Research
Hormonal
Early Time-Restricted Feeding (eTRF) alters the expression of circadian clock genes (BMAL1, CRY1, CRY2, RORA) and increases expression of longevity (SIRT1) and autophagy (LC3A) genes in the morning, suggesting a shift toward cellular repair and aging resistance pathways.
This node explains the biological mechanism: eating early may trigger your body's internal repair and aging-resistance genes (like SIRT1 and LC3A) in the morning. This supports the practical advice of N1 but is not a standalone intervention.
ModerateSupportsMEDIUM confidence
eTRF significantly increased the expression of the circadian clock genes BMAL1 (8 ± 3%; p = 0.007), CRY1 (14 ± 2%; p < 0.0001), CRY2 (8 ± 4%; p = 0.02), and RORA (12 ± 4%; p = 0.003) in the morning... eTRF also increased levels of SIRT1 (10 ± 3%; p = 0.004) and LC3A (22 ± 5%; p = 0.001) in the morning
Why this rating
Small sample size (n=8 for gene expression), exploratory nature of some genes, but statistically significant results.
Source
Early Time-Restricted Feeding Improves 24-Hour Glucose Levels and Affects Markers of the Circadian Clock, Aging, and Autophagy in Humans
Humaira Jamshed et al. · Nutrients · 2019
DOI 10.3390/nu11061234
crossover · n=11Cited 639×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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