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

Strong evidence

Common protocol75–90 mg/day total intake for most adults——

Protocols mapped

1 goal-specific

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Timing

Any consistent time; divide larger amounts

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Expected effect

Days to months when intake or status is inadequate

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Primary uses

Nutritional adequacyDeficiency correctionIron absorption

Watch for

Diarrhea · Abdominal cramps

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