If the biorhythm is repeatedly out of balance, this can have negative effects on the metabolism in the long term. Researchers agree that there is a link between daylight conditions and sugar metabolism. Studies have also shown that the body’s internal clock influences physiological processes. Hunger, appetite, wakefulness, drowsiness, but also the readiness of the cells to absorb sugar and insulin sensitivity are subject to the day-night rhythm.
Metabolic Balance Blog 