Photoperiod and metabolic health: Evidence, mechanism, and implications

Prashant Regmi, Morag J. Young, Gabriela Minigo, Natalie Milic, Prajwal Gyawali

Research output: Contribution to journalReview articlepeer-review

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Circadian rhythms are evolutionarily programmed biological rhythms that are primarily entrained by the light cycle. Disruption of circadian rhythms is an important risk factor for several metabolic disorders. Photoperiod is defined as total duration of light exposure in a day. With the extended use of indoor/outdoor light, smartphones, television, computers, and social jetlag people are exposed to excessive artificial light at night increasing their photoperiod. Importantly long photoperiod is not limited to any geographical region, season, age, or socioeconomic group, it is pervasive. Long photoperiod is an established disrupter of the circadian rhythm and can induce a range of chronic health conditions including adiposity, altered hormonal signaling and metabolism, premature ageing, and poor psychological health. This review discusses the impact of exposure to long photoperiod on circadian rhythms, metabolic and mental health, hormonal signaling, and ageing and provides a perspective on possible preventive and therapeutic approaches for this pervasive challenge.

Original languageEnglish
Article number155770
Pages (from-to)1-12
Number of pages12
JournalMetabolism: clinical and experimental
Early online date29 Dec 2023
Publication statusPublished - Mar 2024


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