Calculate a cognitive stack — choline + phosphatidylserine + omega-3 DHA + B-vitamins — by age and goal. Aimed at adults wanting to preserve cognitive function. Modest effects with consistent use; NOT a substitute for clinical care of cognitive impairment. Math, not medical advice.
Your situation
| Component | Daily target | Best form | Why |
|---|
Why each component matters
- Choline (or alpha-GPC / citicoline): precursor to acetylcholine (memory + attention neurotransmitter). Most adults don’t meet AI (425-550 mg). Eggs (~150 mg/yolk), beef liver, soy are top food sources.
- Phosphatidylserine (PS): phospholipid in cell membranes; brain has high concentrations. Modest cognitive benefit in some MCI trials. Also reduces post-exercise cortisol.
- Omega-3 DHA: structural lipid in brain. Adequate intake supports normal cognitive function. Higher doses (over 1g DHA) tested in MCI with mixed results.
- B12 + folate: homocysteine regulation; deficiency causes reversible cognitive symptoms. Critical for vegans, older adults, those on metformin/PPIs.
- Vitamin D: low D correlates with cognitive decline (observational). Supplementation effect on cognition is modest.
- L-theanine: with caffeine, sharper focus without jitters. See l-theanine-dose-calculator.
- Lion’s mane (optional add-on): see lions-mane-dose-calculator.
Form choices that matter
- Choline forms:
- Choline bitartrate — cheapest, basic; some gut-fermentation odor (TMAO precursor).
- Alpha-GPC — crosses BBB more efficiently, used in cognitive trials (250-500 mg).
- Citicoline (CDP-choline) — clinically tested in stroke recovery, MCI (250-500 mg).
- PS: soy-derived (standard, ~$0.50/100mg) vs sunflower-derived (more expensive, soy-free).
- Omega-3 DHA-rich: for cognitive emphasis, choose DHA-dominant fish oil (or algae oil for vegans). See omega-3-epa-dha-calculator.
Stacking principles
- Take fat-soluble components (omega-3, vit D) with fatty meals for best absorption.
- Caffeine + L-theanine in morning (avoid evening if sleep-sensitive).
- PS + magnesium glycinate evening for cortisol-blunting effect.
- Consistency over months matters. Effect sizes are small; 8-12 weeks minimum to assess.
- Don’t stack with prescription cognitive meds (donepezil, memantine, modafinil) without prescriber coordination.
What this stack is NOT
- Not Alzheimer’s treatment. Active dementia requires neurology care; supplements are adjuncts at best.
- Not study-drug equivalent. Modafinil, methylphenidate have larger cognitive effects but are prescription-only.
- Not a substitute for sleep. Sleep is the dominant cognitive intervention. 7+ hours of quality sleep beats any supplement stack.
- Not a substitute for exercise. Aerobic + resistance exercise → BDNF release → cognitive protection. Larger effect than any supplement.
- Not a quick fix. Effects build over months; subjective improvement varies.