Blood sugar

What it is

Blood sugar, or glucose, is the body's main circulating fuel, kept within a narrow band by insulin and other hormones. Chronically high levels define diabetes, while the milder 'prediabetes' range affects more than a third of adults in the United States. Continuous glucose monitors have moved glucose tracking into consumer wellness, where the meaning of a post-meal spike in a healthy person is far less settled than marketing suggests. Coverage here spans diabetes care, diet research, and the physiology of how the liver and muscles handle glucose.

Written by the Alivewire editors from the coverage below, 3d ago. Not medical advice; how the ratings work.