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Head-to-head evidence comparison — which supplement is right for you?
Phosphatidylserine wins 1 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
4 of 4 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mostly mechanism / observational
1 of 1 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (2)
Outcomes where both Oxiracetam and Phosphatidylserine have evidence — compare verdict strength side-by-side.
800-2400mg daily in divided doses
Morning and early afternoon, Divided into 2-3 doses, With choline source
Oxiracetam powder or capsules
100-300mg daily
With meals, Evening or post-workout for cortisol
Soy or sunflower-derived phosphatidylserine
1-2 weeks
1-2 weeks
1-2 weeks
If choline-deficient
4-12 weeks
2 weeks
4-8 weeks
Clinical efficacy and safety of nicergoline combined with oxiracetam in the treatment of vascular cognitive impairment
Pakistan journal of pharmaceutical sciences (2020) · Rct · n=120
The combined group had the highest effective rate and the total effective rate was 93.3%.
A Meta-Analysis of Au/Polypropionic Acid Nanoparticles Loaded with Olacetam for the Treatment of Vascular Cognitive Impairment
Journal of nanoscience and nanotechnology (2020) · Meta analysis
The results of the meta-analysis showed that compared with placebo and other medications, oxiracetam significantly improved the mental status of patients, Concise Mental State Checklist score [mean difference (MD)= 5.29, P < 0.01] and Montreal Cognitive Assessment score (MD = 4.32, P < 0.01).
The treatment of cognitive dysfunction in dementia: a multiple treatments meta-analysis
Psychopharmacology (2018) · Meta analysis · n=44854
The pooled standardized mean difference of the treatment effects on cognitive dysfunction was 0.439 (95% confidence interval 0.374, 0.504).
Effects of a food supplement containing phosphatidylserine on cognitive function in Chinese older adults with mild cognitive impairment: A randomized double-blind, placebo-controlled trial
Journal of affective disorders (2025) · Rct · n=190
A total of 190 participants (mean [SD] age, 67.95 [5.62] years; 70 (36.8 %) male and 120 (63.2 %) female) were randomized to the placebo group (n = 95) and intervention group (n = 95).
Phosphatidylserine containing omega-3 fatty acids may improve memory abilities in non-demented elderly with memory complaints: a double-blind placebo-controlled trial
Dementia and geriatric cognitive disorders (2010) · Rct · n=157
157 participants were randomized to receive either PS-DHA or placebo for 15 weeks.
Phosphatidylserine for the Treatment of Pediatric Attention-Deficit/Hyperactivity Disorder: A Systematic Review and Meta-Analysis
Journal of alternative and complementary medicine (2021) · Meta analysis · n=216
Four studies met the inclusion criteria for the narrative review (n = 344) and three for the meta-analysis (n = 216).
Based on multiple meta-analyses showing cognitive improvements in vascular dementia and stroke populations. One major RCT (n=500) showed no benefit for post-stroke cognitive impairment, limiting confidence. Effects may be population-specific and less pronounced in healthy individuals.
Based on RCT in 190 Chinese older adults with mild cognitive impairment and systematic review of neuronutrients. Limited by small number of direct studies and population-specific findings.
AI-estimated from published studies. Interpret as directional guidance.
Phosphatidylserine has a higher evidence score (6/10 vs 5/10) and wins in 1 of 3 categories.
For improve memory & learning, Phosphatidylserine has a higher relevance score (80 vs 62).
No known interactions between Oxiracetam and Phosphatidylserine have been documented in our database. However, always consult a healthcare provider before combining supplements.