Circadian Regulation of Metabolism: Commitment to Health and Diseases.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing mechanistic and translational literature without new empirical data
PubMed 37253106 · doi:10.1210/endocr/bqad086
What was done
This narrative review summarizes basic and translational evidence examining how central and peripheral circadian clocks regulate systemic metabolic homeostasis, the metabolic consequences of circadian disruption (such as shift work and jet lag), and the role of chrononutrition.
What was found
The abstract reports no primary experimental data or statistical estimates. It outlines mechanistic concepts, noting the suprachiasmatic nucleus contains approximately 20,000 neurons, and states that circadian misalignment increases the risk of obesity and type 2 diabetes while food timing acts as an independent zeitgeber to entrain peripheral clocks.
Why it matters
It emphasizes meal timing as an independent non-photic cue for synchronizing peripheral metabolic rhythms, positioning chrononutrition as an actionable strategy to support metabolic health.
Limits
As a narrative review, it lacks systematic search criteria, meta-analytic pooling, and risk-of-bias evaluation. No primary human trial data, sample sizes, or quantitative effect sizes are reported in the abstract.
Cited by
- contradicts The human suprachiasmatic nucleus is composed of approximately 100,000 neurons and measures about one cubic millimeter.