For generations, medicine has measured blood sugar in snapshots — a fasting number, a quarterly average — missing the living rhythm of glucose as it rises and falls through a human day. Researchers at Boston University have now shown, through continuous glucose monitoring data from 1,300 non-diabetic adults in the Framingham Heart Study, that these hidden rhythms carry meaning: higher average glucose and extended time above 140 mg/dL correlate with hypertension and elevated cholesterol, the early harbingers of cardiovascular disease. The finding invites a quiet but consequential question — whe