The oral glucose tolerance test (OGTT), or glucose tolerance test is a blood test used (not routinely however) to diagnose diabetes, and gestational diabetes. Information in regard to reliability of the oral glucose tolerance test is important, as some conditions (common cold), or food (caffeine), or lifestyle habits (smoking) may alter the results of the oral glucose tolerance test.

#8. COFFEE—Several studies have found coffee, whether regular or decaf, reduces risk of type 2 diabetes. Some research has found that those drinking 6 or 7 cups a day have about a 35% lower risk of getting diabetes than those drinking less than 2 cups.10 Drink wisely, Weisenberger says. Unfiltered coffee has compounds that raise your bad (LDL) cholesterol, so use a paper filter with methods such as French press. And don't undo the benefits by adding too much sugar, cream or syrup.
If your mood, sleep, blood sugar, and energy are being affected, limiting intake may be advised. The most important thing when choosing coffee for people with diabetes or those managing their weight is to pay attention to the carbohydrate content from milk and added sweeteners. Cutting back or eliminating artificial sweeteners is advised as these have shown to disrupt gut bacteria, cause cravings and overeating, and negatively impact weight and blood sugar management.
In general, prediabetes is not associated with any specific symptoms. However, there may be indicators of problems in blood sugar metabolism that can be seen years before the development of overt diabetes. Health-care professionals in the field of endocrinology are now routinely looking at these indicators in patients who are high risk for developing diabetes.
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