A 10-hour daily time-restricted eating window for three weeks significantly improves 24-hour glucose control in adults with type 2 diabetes, reducing mean glucose levels from 7.6 to 6.8 mmol/L and increasing time spent in normoglycemia from 12.2 to 15.1 hours per day, without altering insulin sensitivity or hepatic glycogen content.

When food is limited to a 10-hour window each day, the body shifts how it handles glucose after meals. Instead of burning glucose for energy, muscle and liver cells store more of it as glycogen. This pulls glucose out of the blood, lowering overall blood sugar levels without changing how sensitive cells are to insulin or how much sugar the liver stores.