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Magnesium, ashwagandha, L-theanine, and the evidence.
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Magnesium is an essential mineral with an established Recommended Dietary Allowance. Supplement forms differ in how much elemental magnesium they deliver per capsule.
2 products Nutrition and supplement labelsAshwagandhaAshwagandha is an herb sold as a root or leaf extract. NCCIH notes that most studied preparations use the root, and that products differ in extract ratio and standardized withanolide content.
2 products Nutrition and supplement labelsL-theanineL-theanine is an amino acid derived from tea. A 2026 systematic review and meta-analysis of 31 randomized trials found a short-term attention benefit in healthy adults, while effects on stress, anxiety, fatigue, and depressive symptoms were smaller, inconsistent, or less certain.
2 productsRelated label guides: Magnesium glycinate, Ashwagandha.