Showing posts with label AGP Glucose Pattern Analysis. Show all posts

7/19/2026

My Type 1 Diabetes Journey: Mastering Blood Sugar Control

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[Facing My Fears: The Data and Emotional Rollercoaster of My Re-hospitalization & Precision Needle Biopsy]

My hospitalization was triggered by persistently high IgG4 levels—suggesting possible Autoimmune Pancreatitis (AIP)—along with a visibly swollen pancreas on my contrast CT and MRI scans. To get a definitive answer, I was put under close observation.
IgG4 Reference Levels: 146 (At admission) → 135 (1 month later)
The thought of an Endoscopic Ultrasound-Guided Fine-Needle Aspiration (EUS-FNA)—where a fine needle is passed through the stomach wall to harvest tissue—was absolutely terrifying. The mere mental image stressed me out. A knowledgeable friend even warned me, "If it's a tricky procedure, you should swap hospitals to find a high-volume specialist." I was torn, but ultimately stuck with my original doctor. Funnily enough, when I researched it a few days beforehand, I realized this is actually a very standard procedure and not nearly as daunting as I'd feared (lol!).
On the day of the procedure, the sedative knocked me right out, and the next thing I knew, I was back in my hospital room. It felt just like getting a routine endoscopy. Aside from a slightly bloated tummy, I felt completely fine. I breathed a huge sigh of relief when my doctor confirmed, "Everything went perfectly." If the results came back positive, I would have faced the ultimate challenge for a Type 1 Diabetic: steroid therapy and the explosive blood sugar spikes that come with it. Waiting for the results was an absolute nerve-wracking ordeal.

[The Verdict: My Test Results]

Two weeks later, the biopsy results came back. (According to medical guidelines, they look at things like the rate of abnormal cell infiltration). The verdict? "The pancreas does not present like AIP. Pathology is negative for AIP. => No issues detected." In that single moment, the dark cloud of cancer and autoimmune pancreatitis fears completely vanished.
Fast forward three months: a follow-up MRI scan officially confirmed that the swelling and inflammation in my pancreas had completely subsided and resolved.
While the root cause of the "fulminant type 1 diabetes" that suddenly struck me remains a mystery, we cleared up its connection to my pancreatic swelling. Now, I can focus solely on managing my blood sugar with insulin, without needing any unnecessary extra treatments.

【Summary】

Since being discharged, my daily routine has revolved around insulin injections before every meal and finger-prick blood sugar checks.

But after getting through that follow-up hospitalization and biopsy, I received the ultimate peace of mind: my biggest fears (pancreatic cancer and autoimmune pancreatitis) were completely ruled out. Best of all, I don't need steroid therapy anymore. Now, I can pour 100% of my energy into my daily insulin routine and mastering my blood sugar control.

Survived the dreaded needle biopsy and got a clean bill of health, putting my biggest worries to rest.
Successfully avoided steroid treatments that would have sent my blood sugar levels through the roof.
The final MRI confirmed that the pancreatic inflammation from when my fulminant diabetes first struck has fully cleared up.

⚠️ Disclaimer & Important Notice

The blood sugar data and charts shared in this blog represent my personal records and experiences. They are not intended as medical advice, dietary recommendations, or a guarantee of specific medical outcomes. Blood sugar responses and bodily reactions vary greatly from person to person. If you are currently undergoing medical treatment or managing a restricted diet, please consult your primary physician or a registered dietitian. This blog assumes no responsibility for any actions taken based on the information provided here.

ℹ️ Note for International Readers:
• Portion Sizes: The food portions and nutritional data featured in this blog are based on standard Japanese serving sizes, which may be smaller than typical Western servings.
• Net Carb Calculation: Net Carbs = Total Carbs - Dietary Fiber.

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Japanese Food The T1D Diaries: Real-Life Blood Sugar Tracking & Insights

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I decided to track my blood sugar levels after treating myself to Chateraise's "Freshly Squeezed Milk Bar - Coffee Flavor." As expected, my numbers shot up post-indulgence. Thanks to the high fat content of the ice cream, my glucose spiked quickly and then lingered at a high level for quite a while.

Ingredients & Nutrition: This treat is officially classified as premium "ice cream" with a relatively high milk fat content of 9.0%. Since dietary fat slows down digestion and delays carb absorption, my blood sugar didn't just spike immediately—it remained elevated well into the night.

[Quick Summary]

Right before 10:00 PM, I was heading into low blood sugar territory. My glucose had dipped to 69 mg/dL, but it spiked dramatically after eating the ice cream bar.
At its peak, my glucose reached 199 mg/dL, creating a massive spike with a total fluctuation of +105 mg/dL.
Even past 11:30 PM, my levels refused to come down, staying elevated for quite some time.

[Blood Sugar Data After Eating the Ice Cream]

Around 10:00 PM: Started on the lower side, right around 69 mg/dL just before eating.
10:00 PM – 11:30 PM: Levels began climbing immediately after eating, steadily rising over the next hour and a half.
Around 11:30 PM: Reached my peak for the night at 199 mg/dL, where the rise finally plateaued.
After Midnight: Although it dropped slightly past the peak, my glucose hovered stubbornly around 140 mg/dL even by 1:00 AM.

⚠️ Disclaimer & Medical Note
The blood sugar data and graphs featured in this post are based purely on my personal tracking and experiences. They are not intended to recommend or guarantee any medical treatment, diet, or diagnosis. Blood sugar responses vary greatly from person to person. If you are undergoing medical treatment or are on a restricted diet, please consult your physician or registered dietitian. The author of this blog assumes no liability for any actions taken based on this information.

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7/09/2026

Type 1 Diabetes: My Blood Sugar Battle and a Terrifying Pancreas Scare

Although my blood sugar levels slowly began to stabilize after starting insulin therapy, my ordeal was far from over. In fact, subsequent detailed MRI scans revealed that my 'pancreas was severely swollen,' raising suspicions of another serious illness. This time, I'll share details about this other alarming change in my body and the concerning test results.

[Swollen Pancreas and Suspected Autoimmune Pancreatitis]

Detailed MRI imaging of my internal organs revealed that my pancreas was generally enlarged (swollen and bloated).
My doctor informed me of the possibility of pancreatic cancer, as well as 'my own immune system mistakenly attacking my pancreas (autoimmune pancreatitis).
Hearing that the sudden onset of fulminant Type 1 Diabetes might be deeply connected to this severe inflammation of my pancreas, I was shocked to realize just how much my body was deteriorating.
Was it diabetes first, or pancreatitis? The cause of fulminant Type 1 Diabetes is often unclear, making it hard to say...

[Terrifying Abnormal Numbers]

Among my blood test results, one alarming number was CA19-9.
This value is typically used as a marker for cancer (tumor marker), with a reference range of 37.0 or less. However, I astonishingly registered an off-the-charts 401.0 U/mL.
I vividly remember my heart pounding when the doctor explained, 'It's unclear if this is a serious illness, or just a temporary spike due to your severely swollen pancreas.'

⚠️ Important Notes on Usage
The blood sugar data and graphs published in this article are solely personal measurement records and impressions, and do not recommend or guarantee specific medical treatments, dietary therapies, or diagnoses. Blood sugar fluctuations and bodily reactions vary among individuals. If you are currently undergoing treatment or on a restricted diet, please consult your primary physician or a registered dietitian according to your own health condition. This blog assumes no responsibility for any damages incurred through the use of this information.

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6/28/2026

Think Fruit Is Always Safe? The Shocking Mango Blood Sugar Spike (with Charts!)

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I decided to add just two slices of gifted mango to my usual breakfast routine—low-fat milk, yogurt with banana, a fried egg, and whole-wheat toast—and my blood sugar spiked to an astonishing degree.

Seeing my normally stable glucose levels shoot up alongside the sweetness of the mango was a stark reminder of just how powerful natural fruit sugars can be.

Using this spike as a learning experience, I want to explore some tips on how we can enjoy our favorite fruits more mindfully and strategically.

Summary

Adding mango to my morning routine triggered a massive post-meal blood sugar spike.
Even though I consumed dietary fiber from the whole-wheat toast, it wasn't enough to buffer the high sugar load from the fruit itself.
This experience made me realize I need to rethink eating mango like a dessert and start being smarter about portion sizes and timing.

Analyzing Mango's Nutrients & Blood Sugar Impact

Mangoes are rich in fructose and glucose, which digest and absorb incredibly fast, making them a high-risk food for sudden blood sugar spikes.
With a relatively high glycemic index (GI), combining it with my usual breakfast pushed my total carb intake too high, causing my levels to skyrocket.
While fruit is widely viewed as healthy, the rapid absorption of concentrated natural sugars can actually put quite a strain on your body.
To avoid these post-meal spikes, I've found it's best to either limit the portion size or enjoy them as a standalone snack when baseline blood sugar levels are already low.

⚠️ Important Disclaimer
The blood sugar data and charts presented in this article are solely based on personal measurements and experiences. They do not constitute, nor should they be used as, medical advice, dietary therapy, or diagnosis. Blood sugar responses vary greatly from person to person. If you are currently undergoing medical treatment or have dietary restrictions, please consult your primary physician or a registered dietitian before making changes. This blog assumes no responsibility for any actions taken based on the information provided herein.

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6/25/2026

My Insulin Switch Story: From Glargine to Tresiba

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Insulin

In diabetes treatment, the choice of basal insulin directly impacts the quality of daily life. This time, I've compiled my personal experience with switching insulin preparations and a comparison between them.

Comparing the Preparations

Feature	Glargine (Lantus, etc.)	Tresiba (Degludec)
Mechanism of Action	Once-daily, consistent effect	Ultra-long acting (42+ hours)
Dosing Time Flexibility	Same time each day is preferred	Tolerant of minor deviations

The Value of "Peace of Mind" from My Experience

Initially, I used Glargine during my hospitalization, but after discharge, my doctor at the outpatient clinic suggested switching to Tresiba. While Tresiba's drug cost is slightly higher, the "peace of mind" it offers—knowing that its effects overlap even if dosing times are slightly off, and there's no anxiety about the effect wearing off—is, I believe, worth more than the price difference.

Important Considerations When Using Tresiba

Key Points to Be Aware Of:

Prolonged Hypoglycemia: Due to its very long-acting nature, if hypoglycemia (low blood sugar) occurs, it may take a longer time for blood glucose levels to return to normal.
Injection Site Management: As this medication remains in the body for an extended period, it's crucial to properly rotate injection sites and protect the subcutaneous tissue.

*This content is based on personal experience. Any changes to medication or administration methods should always be discussed and decided upon with your primary physician.

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6/21/2026

Japanese Food Blood Sugar Test: Does Chateraise's 70% Low-Carb Chocolate Ice Cream Actually Work? (Part 2!)

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Hi everyone!

Following up on my previous test of Chateraise's "70% Low-Carb Chocolate Ice Cream," today I'm testing another treat to see how it compares.

Here is my honest report on how my blood sugar responded after giving it a taste test!

Today's Results

Here is my blood sugar chart after eating the ice cream. Use this to compare how it differs from the previous "low-carb ice cream"!

▼ Key Takeaways From the Graph

My glucose level peaked with an increase of +43 mg/dL.
The levels rose gradually, taking some time to reach the peak.
My average blood sugar hovered around 130 mg/dL, clearly showing the impact of this snack.

Comparing It to the Previous Low-Carb Ice Cream

Compared to the "70% Carb-Cut" ice cream I tested last time, there was a stark difference in how my blood sugar spiked.

It turns out the total carb count
makes a massive difference in blood sugar fluctuations!

Looking at today's numbers, it's incredibly clear that carb content directly determines the peak glucose level. Comparing this to regular ice cream really made me appreciate just how well low-carb products are formulated to prevent massive glucose spikes.

Wrapping Up: Key Takeaways from Part 2

Treating yourself to ice cream once in a while is great for mental health, and knowing how your body responds to blood sugar makes enjoying these treats so much more worry-free!

◆ Today's Lessons ◆

✓ The higher the carb count, the higher the glucose peak
✓ Choosing snacks that match your unique body chemistry is key
✓ Continuous Glucose Monitoring (CGM) makes tracking beautifully visual

⚠️ Disclaimer / Please Note

This article is a personal record of my own experiences and thoughts and does not guarantee or recommend any specific diet or medical outcome. Blood sugar responses vary from person to person. If you are undergoing medical treatment or strictly managing your carbs, please consult with your doctor or a registered dietitian before making dietary changes.

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6/15/2026

Weekly Glucose Report (2026/06/14)

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[Weekly Report] A Healthy Step! ~Positive Changes and Future Tips from Your Blood Glucose Report~

Hello everyone, thank you for your hard work this week! Let's analyze this blood glucose report together and find tips for leading a healthy life. The data clearly shows your efforts and wonderful changes!

Report Period: Monday, June 8, 2026 ~ Sunday, June 14, 2026

1. Overall Trend from the Weekly Trend Graph

First, let's look at the weekly trend of your blood glucose levels. This graph provides an at-a-glance view of how your blood glucose has changed over the week.

📈 Positive Points

While there was a tendency for higher levels in the first half of the week, it's clear that blood glucose levels have significantly stabilized towards the latter half of the week! Especially from Friday onwards, a stable trend is observed. This is a wonderful result of your daily efforts!
Hypoglycemia (below 70mg/dL) was only observed once, slightly on Sunday, and avoiding severe hypoglycemia is a testament to excellent control.

💡 Areas for Improvement and Future Tips

The average blood glucose was 211mg/dL, and Time In Range (TIR: 70-180mg/dL) was 36.9%. While this indicates room for improvement, the improving trend in the latter half of the week offers great hope!
Particularly at the beginning of the week (Monday), hyperglycemia (378mg/dL) was observed, suggesting that post-meal blood glucose spikes and early morning hyperglycemia (dawn phenomenon or nocturnal hyperglycemia) are still occurring.
The blood glucose variability (CV: 34.1%) is somewhat high, so by reducing this variability, you can aim for more stable blood glucose control.

Next Action: Identify the timing of high blood glucose in the first half of the week (especially after breakfast or at night), and reconsider your meal content, portion sizes, and exercise timing. For instance, eating fiber-rich vegetables first, or taking a light walk after meals, can be effective.

2. Daily Changes from the Daily Summary

Next, let's examine the daily average blood glucose and its fluctuations. This clearly shows how your daily lifestyle habits are influencing your blood glucose levels.

✨ Amazing Improvement and Daily Efforts!

Starting with a high average of 315mg/dL on Monday, there was a significant improvement to 195mg/dL by Tuesday! Furthermore, average blood glucose steadily decreased in the latter half of the week, reaching excellent numbers close to the target on Friday (175mg/dL), Saturday (172mg/dL), and Sunday (153mg/dL)! This is truly a remarkable achievement, clearly demonstrating your daily awareness and changes in behavior!
Notably, Sunday's average of 153mg/dL is the lowest value this week, indicating ideal blood glucose control very close to the target range.

🔍 Key Points for Further Improvement

The first half of the week (Monday-Thursday) still shows a tendency for higher levels. To prevent high numbers like Monday's from recurring, reflect on your diet and activities for those days.
On Sunday, a hypoglycemic event of 53mg/dL was observed once. While this can be a sign of good blood glucose control, hypoglycemia can also lead to discomfort, so caution is advised.

Next Action: Extend the good habits from the latter half of the week to the entire week! Specifically, it's important to identify the cause of Monday's hyperglycemia (e.g., weekend activities, breakfast content) and formulate countermeasures. Also, if there are signs of hypoglycemia, like on Sunday, be sure to take appropriate action, such as having a quick snack.

3. Your "Average Day" of Blood Glucose from the AGP Graph

The AGP (Ambulatory Glucose Profile) graph overlays a week's worth of data to show the average pattern of your blood glucose fluctuations. It's a highly useful resource for planning future strategies.

🌱 Understanding Trends and Next Steps

Looking at this graph, it's evident that blood glucose levels tend to rise significantly and peak between 6 AM and 9 AM. This could be due to breakfast content, or hormonal influences during the morning (dawn phenomenon), among other factors.
While levels stabilize during the day, a rising trend is observed again at night (after 9 PM).
The overall variability (darker shaded area) is still wide, but identifying these patterns makes it easier to formulate more specific strategies.

Next Actions:

Revisit Breakfast: To manage morning hyperglycemia, choose fiber-rich, low-GI foods and try to eat slowly. Light exercise after meals can also be effective.
Evening Strategies: Check if your dinner time is too late or if you're having snacks before bed. To suppress nocturnal blood glucose spikes, consider a lighter dinner or incorporating some physical activity after eating.
Hydration: When blood glucose is high, the body tends to be dehydrated. Remember to hydrate frequently.

Summary: Remarkable Progress and the Path to Further Health!

This week, you have truly made remarkable progress! The stabilization of blood glucose levels, especially towards the latter half of the week, is a testament to your high level of awareness and daily efforts. Let's use these positive changes as confidence to strive for an even healthier lifestyle.

While there are still areas for improvement, these should not be seen as "negative points," but rather as "opportunities for further growth." Using the trends revealed in this report as a guide, review your lifestyle habits one by one, at your own pace.

Future Goals

Further improve Time In Range (TIR)!
Reduce blood glucose variability and maintain a stable state.
Control hyperglycemia, especially in the first half of the week and in the morning.
Manage the risk of hypoglycemia and continue control safely.

I wholeheartedly support your healthy future! I look forward to seeing new positive changes in the next report.

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6/12/2026

Weekly Glucose Report (2026/06/07)

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Reflecting on a Week of Blood Glucose Trends! Positive Steps Towards a Healthier Future

Hello everyone! Managing blood glucose is incredibly important for maintaining a healthy daily life. Today, let's analyze a week's blood glucose report together and uncover the "good points" and "areas for improvement" that emerge. Let's find hints from a positive perspective to make the next week even better!

Checking This Week's Overall Blood Glucose Trends!

First, please take a look at this graph. It displays an overview of your blood glucose movements for the week. During this period (June 1st - June 7th), your average blood glucose was 216 mg/dL, with a maximum of 418 mg/dL and a minimum of 63 mg/dL.

What Went Well!

Looking at the overall graph, there are clear periods, especially mid-week (Thursday and Friday), where blood glucose remained within the target range (the light green band) for extended periods! This is a wonderful achievement. The diet and activities during these days might hold clues for stable blood glucose levels.
Although hypoglycemia (below 70 mg/dL), which is below the target, was observed once on Sunday morning, it appears to be infrequent. This indicates a low risk of discomfort due to low blood glucose, which is a positive trend.

Areas for Further Improvement!

The red dots (hyperglycemia) and yellow areas (hyperglycemia exceeding the target range) on the graph are particularly frequent at the beginning of the week, on weekends, and after meals. If you can moderate post-meal blood glucose spikes a bit more, it would reduce the burden on your body and help you feel more comfortable.
The overall blood glucose variability (CV value 32.0%) also seems a bit high. It would be ideal to increase the time spent stable within the target range and reduce this variability.

Daily Blood Glucose: Turbulent or Stable?

Next, let's take a closer look at the daily blood glucose movements. You'll notice differences in blood glucose trends from day to day.

Daily Highlights!

Thursday (Avg 163 mg/dL) and Friday (Avg 172 mg/dL) were truly "Excellent Health Days"! Your blood glucose remained within the target range for most of the time, and the average values were the best of the week. This is truly wonderful! Try to recall how you spent these days and what you ate, then apply those insights to other days.
The stability, especially from Thursday night into the morning and throughout the day, is remarkable.

Tips for Improvement!

At the beginning of the week (Monday, Tuesday, Wednesday) and on weekends (Saturday, Sunday), average blood glucose tends to be slightly higher, with a significant rise particularly after breakfast and dinner. Reviewing your meal content, portion sizes, and activity levels on these days might help suppress sudden blood glucose spikes.
There are also periods during the day, such as Saturday morning and Sunday evening, where high levels persist.

Discovering Hidden Patterns! A Day Through the AGP Graph

Finally, let's look at the AGP (Ambulatory Glucose Profile) graph, which summarizes your blood glucose trends over a 24-hour cycle for the entire week. This shows not only specific days but also the average blood glucose movement and variability for each time segment.

Positive Trends and Discoveries!

The thick central line on the graph indicates your median blood glucose (average movement). Looking at this line, you can see that from around 12:00 PM to 3:00 PM, blood glucose is relatively stable and approaches the target range (70-180 mg/dL). You might have some good habits during this time!

Next Steps!

Since the median value exceeds the upper limit of the target range (180 mg/dL) for most of the time, calming your blood glucose overall a bit more would lead to an even better state.
Particularly, there's a tendency for blood glucose to be high from night into the early morning (around 0:00 to 9:00 AM) and after dinner (after 6:00 PM). Furthermore, the width of the graph (shaded area) is wide during these times, indicating significant day-to-day variability in blood glucose. The timing and content of dinner, as well as pre-sleep activities, might be influencing your blood glucose.
Reducing blood glucose variability is crucial for lessening the burden on your body and leading a stable life.

Towards the Next Week! Tips for Aiming for Healthy Blood Glucose Levels

This week's report brought many discoveries. Based on this information, here are some tips to help you spend the next week even healthier.

1. Moderate Blood Glucose Spikes with Dietary Adjustments

Let's focus particularly on post-breakfast and post-dinner blood glucose, which tends to be high. You can suppress sudden blood glucose spikes by practicing "vegetable first" (eating fiber-rich vegetables before other foods) or by reviewing your carbohydrate choices (e.g., opting for whole grains).
For weekend meals, too, please try to incorporate the "good habits" you practiced on weekdays (Thursday and Friday).

2. Incorporate Light Exercise

Light physical activity after meals is very effective in moderating the rise in blood glucose. For example, how about taking a 15-minute walk after your meals?

3. Pay Attention to Nighttime Blood Glucose!

A tendency for high blood glucose from night into the early morning was observed. Moving your dinner time slightly earlier, avoiding snacks before bed, or adjusting dinner portion sizes might be effective.

4. Extend Good Habits to Other Days!

The excellent blood glucose control on Thursday and Friday is surely the result of your daily efforts. Reflect on what was different on those days, what you ate, and what activities you engaged in. Then, try to extend those good habits to other days.

Summary: Let's Move Forward Positively, Step by Step!

Managing blood glucose is like a marathon. It's important not to get too caught up in highs and lows, but to utilize the insights gained from data and move forward positively, step by step.

We hope this analysis serves as a helpful step in supporting your healthy lifestyle. If you wish to know more about insulin adjustments or dietary therapy, please always consult with a specialist doctor or a registered dietitian.

Let's all have another healthy and fulfilling week, both in body and mind!

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How Just ONE Slice of Whole Wheat Bread Sent My Blood Sugar Soaring Past 220! The 'M-Spike' of Terror Caused by Insulin Lag.

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Glucose Metrics Analysis

[Experiment] Does Whole Wheat Bread Really Spike Blood Sugar?
The "Diabolical M-Spike" Caused by Insulin Time Lag

CGM Data Verification Report

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Whole wheat bread is generally considered "rich in dietary fiber and less likely to raise blood sugar." However, my Continuous Glucose Monitor (CGM) captured a shocking graph of a rapid surge, with a peak blood sugar of 220 mg/dL. I thought I was choosing a healthy food, so why did it cause such a spike? Hidden behind this phenomenon was a subtle "time lag" between the action time of rapid-acting insulin and the timing of my meal. Let's logically examine this based on actual data.

1. Tracing the Day's Timeline and Overall Statistics from the Log

First, let's organize the menu I consumed, the timing of insulin administration, and the overall statistics obtained for this experiment. What appeared to be ideally controlled morning blood sugar levels would drastically change just a few hours later.

Peak Blood Sugar

220mg/dL

Average Blood Sugar

172mg/dL

Lowest Blood Sugar

97mg/dL

06:30 Administered 8 units of rapid-acting insulin "Humalog," then had breakfast (200ml milk, 1 egg, banana yogurt).

08:00 Reached the first peak (approx. 205 mg/dL). Afterward, blood sugar steadily decreased due to the insulin's effect.

09:30 Blood sugar dropped steadily to 97 mg/dL. At this time, I consumed a single slice of whole wheat bread (equivalent to one 8-slice portion) baked in a home bakery, by itself.

11:00 Recorded the second peak (highest value 220 mg/dL).

Figure 1: My beloved home bakery and the freshly baked, aromatic whole wheat bread

2. Blood Sugar Graph Analysis: Why the "Diabolical M-Shape" Formed

The CGM graph recorded clearly shows two distinct peaks, forming what's known as an "M-shaped pattern." What's noteworthy here is that the second peak, after eating just one slice of supposedly healthy whole wheat bread, is clearly higher and sharper than the first peak, which occurred after consuming dairy and fruit.

Figure 2: The steep M-shaped spike shown by CGM data (yellow shaded area indicates the trend after bread intake)

The First Peak (06:30-09:30): Precise Insulin Action

Due to the lactose in dairy products (milk, yogurt) and fructose in the banana, my blood sugar temporarily rose to approximately 205 mg/dL. However, the 8 units of Humalog administered at 06:30 took full effect, bringing the blood sugar down smartly to an extremely ideal baseline of 97 mg/dL by 09:30. Up to this point, it was perfect control.

The Second Peak (09:30-12:00): Carbohydrate Intake in a Vulnerable State

The problem began immediately after I consumed the freshly baked whole wheat bread at 09:30, just when my blood sugar had settled. As the yellow shaded zone on the graph shows, the number recorded a rocket-like surge of +123 mg/dL in just an hour and a half, skyrocketing past 220 mg/dL.

3. The Clinical Perspective: The Insulin "Blind Spot"

There's no doubt that whole wheat has a lower Glycemic Index (GI) and is absorbed more slowly than refined white rice or white flour. Nevertheless, the cause of such a significant spike was not the quality of the food itself, but rather a "gap in the body's insulin dynamics."

Rapid-acting insulin preparations like "Humalog," which I used, begin to act approximately 15 minutes after administration, peak within 1 to 3 hours, and then lose their effect within about 3 to 5 hours.

The insulin administered at 06:30 was already in the final stages of its activity by 09:30, three hours later. In other words, my body was in a "vulnerable state with almost no insulin remaining to process additional carbohydrates." When I introduced bread, which is still a carbohydrate despite being low GI, the body couldn't process the sugar, and it directly flooded my bloodstream, reflecting in the drastic numbers.

■ Key Takeaway from This Experiment

It's the realization that "just because current blood sugar is low (97 mg/dL) doesn't mean it's safe to eat additional carbohydrates." What's crucial isn't merely the current number, but rather the timeline perspective: "how much active insulin remains in the body to handle the carbohydrates you are about to consume."

4. Future Measures and Conclusion

It's not easy to maintain composure in front of the wonderful aroma of freshly baked bread wafting from a home bakery. If I were to split my staple food intake (as a snack) with a time delay, as I did this time, I reflect that the following approaches would have been necessary:

1. Reduce the 06:30 insulin dose to match breakfast only, and "split-dose" a small amount of additional insulin to coincide with the 09:30 bread intake.
2. Alternatively, delay bread consumption until the next meal (lunch) to avoid needing additional insulin.

The biggest advantage of CGM is its ability to visualize the "wave of insulin's effectiveness" in your body. This experiment affirmed my belief that mastering this "time-axis control," in addition to knowing how to choose quality ingredients, is the key to more refined blood sugar management.

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7/19/2026

[Facing My Fears: The Data and Emotional Rollercoaster of My Re-hospitalization & Precision Needle Biopsy]

[The Verdict: My Test Results]

【Summary】

[Quick Summary]

[Blood Sugar Data After Eating the Ice Cream]

7/09/2026

[Swollen Pancreas and Suspected Autoimmune Pancreatitis]

[Terrifying Abnormal Numbers]

6/28/2026

Summary

Analyzing Mango's Nutrients & Blood Sugar Impact

6/25/2026

Insulin

Comparing the Preparations

The Value of "Peace of Mind" from My Experience

Important Considerations When Using Tresiba

6/21/2026

Today's Results

▼ Key Takeaways From the Graph

Comparing It to the Previous Low-Carb Ice Cream

Wrapping Up: Key Takeaways from Part 2

◆ Today's Lessons ◆

6/15/2026

[Weekly Report] A Healthy Step! ~Positive Changes and Future Tips from Your Blood Glucose Report~

1. Overall Trend from the Weekly Trend Graph

📈 Positive Points

💡 Areas for Improvement and Future Tips

2. Daily Changes from the Daily Summary

✨ Amazing Improvement and Daily Efforts!

🔍 Key Points for Further Improvement

3. Your "Average Day" of Blood Glucose from the AGP Graph

🌱 Understanding Trends and Next Steps

Summary: Remarkable Progress and the Path to Further Health!

Future Goals

6/12/2026

Reflecting on a Week of Blood Glucose Trends! Positive Steps Towards a Healthier Future

Checking This Week's Overall Blood Glucose Trends!

What Went Well!

Areas for Further Improvement!

Daily Blood Glucose: Turbulent or Stable?

Daily Highlights!

Tips for Improvement!

Discovering Hidden Patterns! A Day Through the AGP Graph

Positive Trends and Discoveries!

Next Steps!

Towards the Next Week! Tips for Aiming for Healthy Blood Glucose Levels

1. Moderate Blood Glucose Spikes with Dietary Adjustments

2. Incorporate Light Exercise

3. Pay Attention to Nighttime Blood Glucose!

4. Extend Good Habits to Other Days!

Summary: Let's Move Forward Positively, Step by Step!

[Experiment] Does Whole Wheat Bread Really Spike Blood Sugar? The "Diabolical M-Spike" Caused by Insulin Time Lag

1. Tracing the Day's Timeline and Overall Statistics from the Log

2. Blood Sugar Graph Analysis: Why the "Diabolical M-Shape" Formed

The First Peak (06:30-09:30): Precise Insulin Action

The Second Peak (09:30-12:00): Carbohydrate Intake in a Vulnerable State

3. The Clinical Perspective: The Insulin "Blind Spot"

4. Future Measures and Conclusion

[Experiment] Does Whole Wheat Bread Really Spike Blood Sugar?
The "Diabolical M-Spike" Caused by Insulin Time Lag