Side by side

Compare supplements

Put up to three ingredients next to each other. See where the evidence, dosing, timing, and tradeoffs differ.

Supplement 1Supplement 2Supplement 3

Measure

Add a supplement

Evidence

Limited evidence

Common protocol1–2 g before bed in small sleep studies——

Protocols mapped

1 goal-specific

—

Timing

30–60 minutes before bed

—

Expected effect

Study-specific; commonly several weeks

—

Primary uses

Sleep-onset researchMood researchTryptophan nutrition

Watch for

Drowsiness · Nausea

—