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Evidence

Limited evidence

Common protocol20–21.5 mg/day PQQ disodium salt——

Protocols mapped

1 goal-specific

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Timing

Once daily; no proven special clock time or meal pairing

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Expected effect

8–12 weeks in cognitive trials

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Primary uses

Cognition researchMitochondrial claimsHealthy-aging claims

Watch for

Short trials reported few adverse events · Long-term safety data remain limited

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