Topic
Sleep Supplements
Evidence-based nutritional supplements that support healthy sleep architecture and circadian function.
Deep Research Articles
Research Feed
Which Foods Naturally Contain Melatonin? A Scoping Review of 19 Studies
A 2026 scoping review in Food Science & Nutrition found that Montmorency tart cherries, Jerte Valley cherries, tomatoes, and kiwifruit naturally contain melatonin. Regular consumption can improve sleep quality, duration, and efficiency, particularly in individuals with sleep disturbances.
Low-Dose Melatonin Improves Climacteric Symptoms and Sleep in Female Shift Workers: Randomized Controlled Trial
A 2026 RCT in Journal of Pineal Research found that low-dose melatonin (3mg/day for 12 weeks) significantly improved climacteric symptom scores (Kupperman index -38%), sleep efficiency (+9.2%), and mood in female shift workers, with good safety profile.
How Your Gut Microbiome Affects Sleep: RCT Evidence for Probiotic Interventions
A 2026 systematic review in Nutrients (18 RCTs, 1,247 participants) found that probiotic supplementation — particularly Lactobacillus GG and Bifidobacterium BB-12 strains — significantly improves sleep efficiency, reduces sleep onset latency by ~12 minutes, and improves subjective sleep quality in people with insomnia, with strain-specific effects.