For people with diabetes, post-meal blood sugar management starts with diet. Some everyday eating habits can cause glucose levels to rise sharply without you even realizing it. Here are six habits to watch out for and how to fix them.
1. Eating without portion control
Some people eat until they are completely full, ignoring portion sizes. For those with diabetes, overeating places extra stress on the pancreas and almost guarantees higher post-meal readings.
Better approach: Stick to a fixed amount of food and aim to stop eating when you’re about 70–80% full. At this point, your stomach isn’t stuffed, your interest in food starts to drop, and you won’t feel hungry before your next meal.
2. Overloading on whole grains
Whole grains are rich in fiber and slow down sugar absorption, which is good — in moderation. Eating too much, such as two large whole-grain buns in one sitting, can still raise your blood sugar.
Better approach: Treat whole grains as part of your main carbohydrate allowance. Typically, aim for no more than 100 grams of raw grain-based foods per meal, and reduce this amount if you’re overweight.
3. Eating fruit when blood sugar is already high
Most fruits contain glucose and fructose, which can worsen already high blood sugar levels.
Better approach: If your fasting glucose is under 7.0 mmol/L and your 2-hour post-meal glucose is under 10.0 mmol/L for at least a week, you can reintroduce low-sugar fruits. Otherwise, opt for alternatives like tomatoes or cucumbers.
4. Treating starchy vegetables as side dishes
Vegetables such as potatoes, taro, pumpkin, and lotus root are high in carbohydrates — nutritionally similar to grains. Eating them alongside rice or bread doubles your carb load.
Better approach: When including starchy vegetables in your meal, reduce the amount of other carbs to prevent glucose spikes.
5. Snacking excessively on seeds and nuts
Sunflower seeds, pumpkin seeds, and other nuts are calorie-dense. Just 30 seeds can equal one tablespoon of oil, which contains more calories than lean meat.
Better approach: Limit nuts and seeds to a small handful per day to avoid excess calorie intake.
6. Overeating “healthy” foods
High-protein foods like milk, fish, and shrimp are nutritious, but too much protein can strain the kidneys and add extra calories, raising blood sugar.
Better approach: Stick to around 1 gram of protein per kilogram of body weight daily. Limit milk to about 250 ml a day and keep seafood portions moderate.
By identifying and adjusting these habits, you can better manage post-meal blood sugar and protect your long-term health.
