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Does coffee affect blood sugar?

The average U.S. adult drinks about two 8-ounce (240-milliliter) cups of coffee a day, which can contain around 280 milligrams of caffeine. For most young, healthy adults, caffeine doesn't appear to noticeably affect blood sugar (glucose) levels, and having up to 400 milligrams a day appears to be safe.

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Does caffeine affect blood sugar? Answer From M. Regina Castro, M.D.

The average U.S. adult drinks about two 8-ounce (240-milliliter) cups of coffee a day, which can contain around 280 milligrams of caffeine. For most young, healthy adults, caffeine doesn't appear to noticeably affect blood sugar (glucose) levels, and having up to 400 milligrams a day appears to be safe. Some studies suggest that drinking coffee — whether caffeinated and decaffeinated — may actually reduce your risk of developing type 2 diabetes. If you already have diabetes, however, the impact of caffeine on insulin action may be associated with higher or lower blood sugar levels. For some people with diabetes, about 200 milligrams of caffeine — or the equivalent of one to two 8-ounce (240-milliliter) cups of plain, brewed coffee — may cause this effect. Caffeine affects every person differently. If you have diabetes or you're struggling to control your blood sugar levels, limiting the amount of caffeine in your diet may provide a benefit.

With M. Regina Castro, M.D.

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Can diabetics have 2 slices bread?

Contrary to popular belief, people with type 2 diabetes can, in fact, eat bread — the right kinds, in moderation. The American Diabetes Association (ADA) puts it this way: “Starchy foods can be part of a healthy meal plan, but portion size is key.

If you have type 2 diabetes, at some point someone has probably looked disapprovingly at your toast and told you, “You can’t eat that.” Ignoring for a moment the audacity of this know-it-all, most of the time the remark is simply untrue. Contrary to popular belief, people with type 2 diabetes can, in fact, eat bread — the right kinds, in moderation. The American Diabetes Association (ADA) puts it this way: “Starchy foods can be part of a healthy meal plan, but portion size is key. Breads, cereals, pasta, rice (whole-grain options are better), and starchy vegetables like potatoes, yams, peas, and corn can be included in your meals and snacks.” If you’ve been nervously avoiding the bread aisle at the supermarket until now, fear not. Once you get label-savvy, you’ll be able to find the healthiest, most satisfying bread for you.

RELATED: 11 Vitamin-Packed Superfoods for People With Type 2 Diabetes

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