Plant protein intake is associated with improved sleep quality, while animal protein, particularly from processed red meat and poultry, is linked to worse sleep, with no significant effect from total protein intake on sleep quality.
By Dr. Sanchari Sinha Dutta, Ph.D.Mar 10 2024Reviewed by Benedette Cuffari, M.Sc. In a recent study published in the European Journal of Clinical Nutrition, researchers report that protein intake from plant sources may improve sleep quality. In contrast, increased animal protein intake worsens sleep quality.
An adult requires seven to eight hours of sleep daily to reduce the risk of chronic diseases and mortality. However, a significant reduction in sleep duration in the general population has been reported in recent decades, with many individuals reporting difficulty initiating and maintaining sleep and waking up multiple times at night and early morning.
In these cohort studies, the participants' dietary intake was assessed every four years using validated food-frequency questionnaires. Sleep quality was evaluated using the original or modified version of the Pittsburgh Sleep Quality Index. Related StoriesRegular use of sleep medication was reported by 5-6% of study participants. The presence of sleep apnea was more common among participants with the highest protein intake, with the prevalence of this condition higher among males than females.
Among different animal protein sources, dairy protein intake had divergent associations. While no association between dairy protein intake and sleep quality was observed in the NHS and HPFS cohorts, a position association was observed in the NHS2 cohort.
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