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White tea accelerates re-entrainment to phase advances, while dark and black tea improve adaptation to phase delays in mice

In a mouse model of circadian disruption, white tea markedly accelerated re-entrainment to a 6-hour phase advance, whereas dark and black tea improved adaptation to a 6-hour phase delay. Dark tea also exerted the most prominent modulation of core clock genes across tissues. In vitro, tea polyphenols, theophylline, and EGCG prolonged circadian periods and enhanced adaptation to long cycles.

Last updated: Aug 25, 2026•0 RCTs•📖 Read as article →

Evidence Score

Evidence Score24/100
Human RCT☆☆☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. Distinct effects of tea types and components on circadian rhythm entrainment and clock gene regulation.

observational

Zhang J, Li H, Ma C, Zhang S, Wu G, Shen B, Chen B, Chen L, Zhang Q, Yang G · NPJ science of food (2025)

Participants: N/A
Duration: N/A
Intervention: Six major tea types (oolong, dark, green, black, yellow, white) and four components (theanine, theophylline, EGCG, tea polyphenols) administered to mice and cell cultures
Outcome: Re-entrainment speed to phase shifts (6-hour advance or delay), core clock gene expression, circadian period length in cells
Effect Size: N/A
Population: Mice (animal model) and cellular models of circadian disruption

Result:

PubMed: 41315249DOI: 10.1038/s41538-025-00646-x

Mechanism Graph

Tea compounds interact with circadian clock machinery
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Modulation of core clock gene expression (e.g., Per, Cry, Clock, Bmal1)
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Alteration of cellular circadian period length
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Enhanced behavioral adaptation to shifted light-dark cycles

Limitations

  • ⚠Animal and cellular models may not directly translate to human circadian disruption
  • ⚠Specific dosages and bioavailability of tea components in humans were not addressed
  • ⚠Only acute phase shifts were tested; chronic jet lag or shift work effects were not examined

Frequently Asked Questions

Which tea type is best for jet lag after traveling east (phase advance)?▼

According to this study, white tea markedly accelerated re-entrainment to a 6-hour phase advance in mice, suggesting it may be most beneficial for eastward travel.

Do all tea types affect circadian rhythms the same way?▼

No, the study found distinct effects: white tea helped with phase advances, while dark and black tea improved adaptation to phase delays. Dark tea had the strongest effect on clock gene expression.

What tea components are responsible for circadian effects?▼

In vitro, tea polyphenols, theophylline, and EGCG prolonged circadian periods and enhanced adaptation to long cycles, indicating these compounds are active modulators.

Can drinking tea replace melatonin or other sleep aids for jet lag?▼

This study is preliminary and in animals; human trials are needed. Tea shows potential as a natural modulator, but it is not yet a proven replacement for established interventions.

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References

  1. 1.Zhang J, Li H, Ma C, Zhang S, Wu G, Shen B, Chen B, Chen L, Zhang Q, Yang G. "Distinct effects of tea types and components on circadian rhythm entrainment and clock gene regulation.." NPJ science of food, 2025. PMID: 41315249 DOI: 10.1038/s41538-025-00646-x
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.