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A-F grade per outcome, combining overall evidence with goal-specific relevance. A = strong evidence; F = insufficient. Hover a badge for details.
250-500mg daily (varies by form)
Morning or with meals, Alpha-GPC before cognitive tasks
Alpha-GPC or CDP-Choline (Citicoline)
5-50mg daily
Morning (mimics natural production), With or without food
Micronized pregnenolone capsules
2-4 weeks
4-8 weeks
1-2 weeks
2-4 weeks
2-4 weeks
2-4 weeks
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