Natural light exposure could help improve blood sugar control in individuals with type 2 diabetes, according to a new study presented at the EASD meeting. The research suggests that natural daylight positively affects metabolic functions, potentially aiding in the treatment and prevention of metabolic diseases.
Reviewed by Danielle Ellis, B.Sc.Oct 1 2023 Exposure to natural light could help treat and prevent type 2 diabetes, new research being presented at the annual meeting of the European Association for the Study of Diabetes in Hamburg, Germany suggests.
To explore this, Mr. Habets and colleagues in the Netherlands and Switzerland carried out a range of metabolic tests on a group of people with T2D when they were exposed to natural light and when they were exposed to artificial light and compared the results. The 13 participants stayed in research facilities, which allowed their light exposure, meal, and activity patterns to be tightly controlled.
Evenings were spent in dim light , and the sleeping period in darkness. The participants were provided with standardized meals, meaning they ate the same food in both interventions. Blood sugar levels were continuously recorded by monitors worn on the upper arm, and a range of other tests were performed on the final day and a half of each intervention.
Blood glucose levels were within the normal range for longer during the natural daylight intervention than in the artificial light intervention . Resting energy expenditure and core body temperature followed similar 24-hour patterns in both light conditions. Serum insulin levels measured during the MMT were similar in both light conditions, but the pattern of serum glucose and plasma free acids significantly differed between conditions.
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