Randomized crossover trial assesses urinary melatonin in night shift workers, indicating dietary timing effects.
Introduction: Shift work disrupts circadian rhythms and has been associated with metabolic and sleep disturbances. Melatonin, a key hormone in circadian regulation, is influenced by food intake timing. Emerging evidence suggests that in night shift workers, nighttime food intake may act as a secondary zeitgeber, modulating melatonin secretion and potentially reducing the effects of circadian misalignment induced by shift work. This study aimed to evaluate the effect of nighttime fasting versus nighttime eating on urinary melatonin excretion in fixed night workers, contributing to a better understanding of chrononutrition strategies that may mitigate circadian misalignment and improve long-term health outcomes.
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Teixeira et al. (2025) studied this question.
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