Ashwagandha vs Omega-3
for cognition
Stronger evidence: Ashwagandha
Stronger effect: unknown
Safety: Omega-3 has the more serious interaction profile (moderate vs serious).
For cognition, Ashwagandha has the stronger evidence grade.
Ashwagandha
grade C low certainty
preliminary improvements in memory/executive function; small trials
300–600 mg/day, adults
sources: PMID:42220661