Eating fiber helps control blood sugar by forming a gel that slows sugar absorption, making helpful acids that affect how your body uses sugar, and boosting hormones that make insulin work better.

Certain types of fiber, like those in oats and apples, help your body control blood sugar and lower cholesterol by forming a gel in your gut and making healthy chemicals.

Dietary fiber reduces postprandial blood glucose spikes by slowing absorption, thereby decreasing insulin secretion and enabling normal renal sodium excretion.