Sleep Supplement Ingredients: What You're Actually Buying

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Multi-ingredient sleep products can make it difficult to tell which ingredient is responsible for an effect—or a side effect.

Melatonin and magnesium

Melatonin relates to circadian timing; magnesium is an essential mineral. Their roles and evidence are different, despite frequently appearing together.

Valerian, GABA and 5-HTP

These ingredients appear in many sleep formulas, but evidence and safety considerations differ. 5-HTP in particular may interact with serotonergic medications, so medication users should seek professional guidance.

Lavender and herbal ingredients

Lavender and other botanicals may be used for aroma or as supplement ingredients. Route of administration and formulation matter when evaluating evidence.