Subjects and methods The systematic review and meta-analysis were performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines (Appendix S1) [12] and were registered with the Open Science Framework ( The literature search, data transfer accuracy, and statistics were each double-checked by at least two of the authors
In the decades since its discovery, DSIP has been studied across a broader range of research domains beyond sleep physiology
10.1073/pnas.1314085111 238 MieyalJ
Here's what the research and clinical practice suggest: Standard oral dose: 250500 mg per day Beginner recommendation: Start at 250 mg daily for the first 12 weeks, then increase to 500 mg if well-tolerated Upper range (used in studies): Up to 1,000 mg/day has been used in clinical research without serious adverse effects, though this is not necessary for most people Best time to take: With a meal, preferably breakfast or lunch this improves absorption and reduces digestive discomfort Duration: Most users supplement for 812 weeks before evaluating results
And whatever you do, don't leave your cooler bag in a hot car while you run errands
