Eating food or drinking caloric beverages can significantly affect our blood glucose levels. After eating, blood glucose (postprandial glucose) usually rises for about 30 minutes and then decreases back to normal. If blood glucose levels are too high when fasting or after eating, it could indicate problems like diabetes or insulin resistance. Normally, blood glucose should return to pre-meal levels within two hours. However, if it stays high (above 140 mg/dL), it could be a sign of diabetes.
Non-fasting blood glucose levels can give a better picture of overall blood glucose control than fasting levels, especially in people with insulin resistance. This is because insulin resistance can prevent muscle tissues from properly using glucose, causing blood sugar levels to gradually increase over time. Also, having high blood glucose levels after meals (postprandial hyperglycemia) can be an early sign of diabetes, even before fasting blood sugar becomes abnormal.
Monitoring blood glucose after meals is crucial as high levels are linked to heart disease, stroke, and other serious health issues. Even a small reduction in post-meal blood glucose can significantly lower the risk of heart attacks and other complications.
Managing blood glucose levels is not just about controlling diabetes; it's also about preventing it and other related health problems. This can involve lifestyle changes like diet, exercise, and, in some cases, addressing hormonal imbalances like thyroid disorders.
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