Zinc intake is positively associated with deep sleep duration in night-shift medical residents
In a cross-sectional study of 50 medical residents, zinc intake was positively correlated with deep sleep duration (r = 0.434, p = 0.010). This suggests that higher zinc consumption may be linked to increased deep sleep in this population.
This article is automatically generated from the structured evidence profile behind the claim above. Scores reflect the quality and quantity of available research, not clinical advice.
Zinc intake is positively associated with deep sleep duration in night-shift medical residents The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 34/100 (low).
The Claim
Zinc intake is positively associated with deep sleep duration in night-shift medical residents
This conclusion is most relevant to: 50 medical residents aged 24-34 years from Jordan University Hospital, Amman, Jordan.
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Dietary intake, lifestyle behaviors, and sleep architecture among night-shift medical residents: a cross-sectional study. (Frontiers in nutrition, 2026) —
How It Works
The proposed biological pathway:
- ▸Dietary zinc is consumed and absorbed
- ▸Zinc may modulate neurotransmitter systems involved in sleep regulation
- ▸Zinc influences GABAergic and glutamatergic signaling
- ▸Result: Increased deep sleep duration
Who Might Benefit
Evidence fit by population:
- ▸50 medical residents aged 24-34 years from Jordan University Hospital, Amman, Jordan
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Cross-sectional design prevents causal inference
- ▸Small sample size (n=50) limits generalizability
- ▸Dietary intake and sleep were self-reported or device-measured over only 3 days
Frequently Asked Questions
What was the main finding regarding zinc and sleep?▼
Zinc intake was positively associated with deep sleep duration (r = 0.434, p = 0.010) in medical residents.
How was sleep measured in this study?▼
Sleep parameters including deep sleep were measured using a wearable sleep-tracking device over 3 days.
Who were the participants in this study?▼
50 medical residents aged 24-34 years from Jordan University Hospital in Amman, Jordan.
What other dietary factors were linked to sleep?▼
Higher energy, carbohydrate, and fiber intake were associated with more nocturnal awakenings, and frequent junk food consumption predicted longer total sleep and light sleep duration.
References
- 1.Rousan MY, Ghazzawi HA, Al Oweidat K, Alawamleh RA. “Dietary intake, lifestyle behaviors, and sleep architecture among night-shift medical residents: a cross-sectional study..” Frontiers in nutrition, 2026. PMID: 42339357 DOI: 10.3389/fnut.2026.1851443