Alpha-GPC vs Phosphatidylserine
Nootropic vs Nootropic · evidence-backed comparison
- • Alpha-GPC has the broader effect profile across the 9 effect categories.
- • Alpha-GPC is cheaper per serving ($0.70 vs $0.80).
- • Phosphatidylserine has a slightly cleaner safety profile.
- • Alpha-GPC has higher bioavailability (better absorption).
Side-by-side traits
| Trait | Alpha-GPC | Phosphatidylserine |
|---|---|---|
Category | Nootropic | Nootropic |
Active compound | L-alpha-glycerylphosphorylcholine | Phosphatidylserine (sunflower-derived) |
Form available | Capsule, Powder | Capsule, Softgel |
Source | synthetic | plant |
Typical dose | 300–600 mg | 100–300 mg daily |
Dose range | 300–600 mg | 100–300 mg |
Loading protocol | — | — |
Best taken with | with food | with food |
Best time of day | morning | evening |
Bioavailability How efficiently the body absorbs and utilizes the compound. | Very High (5/5) | High (4/5) |
Onset time | Acute: 60–90 min | Cumulative: 3–8 weeks |
Half-life | ~6 hours | — |
Evidence level Quality and quantity of human research. | Moderate (some RCTs) | Moderate (some RCTs) |
Overall effect Subjective effect magnitude. | Moderate (3/5) | Low (2/5) |
Muscle / strength | Moderate (3/5) | Very Low (1/5) |
Physical energy | Moderate (3/5) | Very Low (1/5) |
Focus / cognition | Very High (5/5) | Moderate (3/5) |
Mood / stress | Moderate (3/5) | Moderate (3/5) |
Sleep quality | Low (2/5) | High (4/5) |
Immunity | Very Low (1/5) | Very Low (1/5) |
Recovery Post-exercise recovery support. | Low (2/5) | Moderate (3/5) |
Longevity / healthspan | Moderate (3/5) | Moderate (3/5) |
Safety rating 5 = exceptionally well-tolerated; 1 = significant risk profile. | High (4/5) | Very High (5/5) |
Price per serving Approximate USD per typical daily dose. | $0.70 | $0.80 |
Vegan friendly | Yes | Yes |
Gluten free | Yes | Yes |
3rd-party tested | Yes | Yes |
About Alpha-GPC
The most bioavailable choline source for the brain. Boosts acetylcholine for focus, learning, and athletic power output.
About Phosphatidylserine
Cell membrane phospholipid that lowers cortisol and supports memory in aging. Particularly useful for stress-induced poor sleep.
Vetted brands, third-party testing, ships worldwide.
Vetted brands, third-party testing, ships worldwide.
Alpha-GPC safety
Common side effects:
- • Headache
- • Heartburn
- • Insomnia (high doses)
Avoid if:
- • Stroke history (consult MD)
Drug interactions:
- • Anticholinergics
Phosphatidylserine safety
Common side effects:
- • GI upset (high doses)
Avoid if:
- • Anticoagulants
Drug interactions:
- • Anticholinergics
- • Anticoagulants
Common uses
- • Focus
- • Memory
- • Power output
- • Cognitive aging
Stacks well with: Caffeine, Lion's Mane Mushroom
Common uses
- • Memory in aging
- • Cortisol management
- • Sleep
- • Athlete overtraining
Stacks well with: Fish Oil (Omega-3 EPA/DHA), Magnesium Glycinate
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Medical disclaimer
SupplementDuel is for educational purposes only and is not medical advice. Consult a physician before starting, stopping, or combining supplements — especially if you are pregnant, breastfeeding, take prescription medication, or have a chronic condition.