In this case, I recorded and analyzed blood glucose changes using CGM (Continuous Glucose Monitoring) during a BBQ where I limited carbohydrates and mainly consumed meat, vegetables, and alcohol. This experiment clearly showed how carbohydrates, protein, and fat affect blood glucose levels, which should be helpful for future blood glucose management.
Update on 2025/05/11
Table of Contents
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Actual Meal
I had a meal with several people at the rooftop BBQ venue in the shopping mall. We bought the ingredients from the supermarket inside the shopping mall. The BBQ venue provided everything including grills, charcoal, and tableware.
Here's what I ate:
- About 300g of beef
- Vegetables (carrots, bell peppers, onions, pumpkin, corn)
- 1 can of Budweiser 350ml
- 1 can of Heineken 350ml
- 3 cans of whiskey highball 350ml
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Blood Glucose Measurement
The graph below shows the post-meal blood glucose changes.
Compared to the reference data of 150g white rice, the blood glucose rise was more gradual and the peak value was lower. I consumed meat, vegetables, a small amount of corn, and for drinks, 2 bottles of beer (350ml each) and 3 cans of whiskey highball (350ml each). The main reason for the suppressed blood glucose rise compared to 150g of white rice is thought to be the lower carbohydrate intake.
- BBQ (purple line)
- 150g white rice (blue line)
Comparison and Analysis
The graph below compares blood glucose changes after the following meals:
- BBQ (purple line)
- 150g white rice (blue line)
- 150g white rice & 100g cabbage (green line)
- 150g white rice & 20g butter (gray line)
- 150g white rice & 30g protein (yellow line)
In all combinations, compared to white rice alone, the blood glucose increase was more gradual and the peak values were lower.
The components found in cabbage (dietary fiber), butter (fat), and protein appear to have an effect on suppressing post-meal blood glucose elevation.
Interestingly, contrary to the common explanation that "vegetable fiber suppresses blood glucose elevation," we found that fats and proteins were more effective at suppressing blood glucose elevation than vegetables (cabbage). In other words, consuming a balanced intake of dietary fiber, fats, proteins, and carbohydrates is effective in suppressing post-meal blood glucose elevation.
In this BBQ, it appears that blood glucose was suppressed after the meal because we consumed sufficient dietary fiber (vegetables), fats (meat), and protein (meat) while limiting carbohydrates.
Summary
We confirmed that blood sugar levels after meals can be suppressed by maintaining a balanced intake of dietary fiber, fats, protein, and carbohydrates.
Even with BBQ, sudden spikes in blood sugar levels can be prevented by being mindful of nutritional balance.
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