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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

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Evidence

Strong evidence

Common protocol25–35 mcg/day adequate intake for adults——

Protocols mapped

1 goal-specific

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Timing

With food

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Expected effect

Days to months when intake or status is inadequate

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Primary uses

Glucose-metabolism researchNutritional exposureDeficiency in specialized clinical nutrition

Watch for

Gastrointestinal upset · Rare kidney or liver injury reports

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