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 protocol300–600 mg/day alpha-GPC——

Protocols mapped

1 goal-specific

—

Timing

Morning or 30–60 minutes before exercise

—

Expected effect

Study-specific; commonly several weeks

—

Primary uses

Choline supplyCognition researchPower-output research

Watch for

Headache · Dizziness

—