# Best Sleep Supplements Reviewed: What Actually Works Poor sleep is costing you gains and productivity. Here's what the evidence says actually helps. ## Melatonin The most-researched option. 0.5–3mg, 30 min before bed. **Best pick:** Natrol Melatonin 5mg Fast Dissolve ## Magnesium Glycinate Deficiency is common. Linked to poor sleep quality. **Best pick:** Thorne Magnesium Bisglycinate ## Our Recommendation Melatonin + magnesium glycinate. That's it.