Spending more time in natural daylight may help people with Type 2 diabetes manage their blood sugar more effectively, according to new research. Scientists found that daylight exposure through windows helped keep blood sugar levels steadier throughout the day. The findings suggest that light exposure may support metabolic health alongside diet and exercise.
In the study, people with Type 2 diabetes worked in an office setting for several days. Some sat near large windows with natural daylight, while others stayed under standard indoor lighting. Average blood sugar levels were similar, but those exposed to daylight spent more time in a healthy glucose range. They also burned more fat for energy and relied less on carbohydrates, a sign of better metabolic flexibility.
Researchers believe daylight helps align the body’s internal clock, especially in muscle cells that process nutrients. When these rhythms are better synchronized, the body handles blood sugar more efficiently. Although the study was small, it suggests that regular exposure to natural light could be a simple, supportive tool for blood sugar control when combined with medical care and healthy habits.
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