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Peret et al. 1 showed a phase shift in liver glycogen circadian rhythm induced by timed food intake in the rat. Furthermore, our previous results in rats showed a significant decrease in pancreas fresh weight and its insulin content as well as in basal insulin secretion after two months of nocturnal fasting 2. These observations indicate that the timing of food intake can influence endogenous functions. A review of specific characteristics of Ramadan fasting indicated that it could serve as an excellent research model to investigate the role of daily meal timing in metabolic endogenous bioperiodicity.
Haouari et al. (Fri,) studied this question.