Ashwagandha vs Iron

for cognition

Stronger evidence: tie

Stronger effect: tie

Safety: Ashwagandha carries a moderate interaction; Iron has none recorded.

For cognition, the two are evidence-matched; the difference is in effect and safety.

grade C low certainty

preliminary improvements in memory/executive function; small trials

300–600 mg/day, adults

grade C low certainty

improves attention/cognition when iron deficiency is present; no benefit if replete

18–65 mg/day, iron-deficient adults

sources: PMID:42220661 · PMID:20000115