Best Phosphatidylserine Supplements 2026: Cost per Effective Dose
Top pick for Phosphatidylserine: Doctor's Best Phosphatidylserine (SerinAid) — 100mg phosphatidylserine per 1 capsule, SerinAid® branded raw material (Chemi Nutra, soy-derived, traceable supply chain), $0.25/day.
All Phosphatidylserine Supplements Compared
| Product | Brand | Dose / Serving | Cost / Day | Certification (as labelled) | Pick | Buy |
|---|---|---|---|---|---|---|
| Doctor's Best Phosphatidylserine (SerinAid) | Doctor's Best | 100mg phosphatidylserine / 1 capsule | $0.25 | SerinAid® branded raw material (Chemi Nutra, soy-derived, traceable supply chain) | Buy | |
| NOW Foods Phosphatidyl Serine 100mg | NOW Foods | 100mg phosphatidylserine / 1 capsule | $0.31 | No third-party PS-content testing disclosed; no branded raw material named | Buy | |
| Double Wood Phosphatidylserine 300mg | Double Wood | 300mg phosphatidylserine / 2 capsules | $0.33 | Non-GMO soy, standardized to 20%, HPLC/ISO-17025 tested per brand site | Buy | |
| Swanson Ultra Sunflower Phosphatidylserine (Sharp-PS Green) | Swanson | 100mg phosphatidylserine / 1 softgel | $0.43 | Sharp-PS® Green branded raw material (sunflower-derived, genuinely soy-free, traceable supply chain) | Buy | |
| Jarrow Formulas PS-100 (Sharp-PS) | Jarrow Formulas | 100mg phosphatidylserine / 1 capsule | $0.54 | Sharp-PS® branded raw material (soy-derived, traceable supply chain) | Buy | |
| Nutricost Phosphatidylserine 400mg (Soy-Free) | Nutricost | 400mg phosphatidylserine / 4 capsules | $0.80 | Labeled soy-free; no third-party PS-content testing disclosed | Buy |
Registry check · Phosphatidylserine
Does anyone independently verify Phosphatidylserine supplements?
We did not find these products in the NSF, USP or Informed Sport registries. Yet 2 of them advertise “third-party testing” without naming the certifier that did it — wording no public registry can confirm or deny. A factory-level claim such as “cGMP” audits the plant, not the Phosphatidylserine bottle you would actually receive.
The 6 products on this page checked against all 5,317 US NSF, USP and Informed Sport listings, 2026-08-25. Full method and limitations.
What Phosphatidylserine labels show
Priced per day, these phosphatidylserine products run $0.25 to $0.80 — a 3.2× gap between the cheapest and dearest phosphatidylserine here, across 6 brands.
In-Depth Phosphatidylserine Guides
Go deeper on phosphatidylserine — by goal, by form, and what the evidence actually supports:
Our Picks
Lowest Cost: Doctor's Best Phosphatidylserine (SerinAid)
100mg phosphatidylserine per 1 capsule. SerinAid® branded raw material (Chemi Nutra, soy-derived, traceable supply chain). $0.25/day. 120 servings per container at $29.99.
The shelf · Phosphatidylserine
These Phosphatidylserine servings are not comparable to each other
Doctor's Best Phosphatidylserine (SerinAid) states 100 mg a serving and Nutricost Phosphatidylserine 400mg (Soy-Free) states 400 mg, both occupy one row of the same price column. Doctor's Best Phosphatidylserine (SerinAid) is the lowest here at $0.25 a day, and its serving (100 mg) is not smaller than most, so its low price is not down to a small serving. Before comparing Doctor's Best Phosphatidylserine (SerinAid) with Nutricost Phosphatidylserine 400mg (Soy-Free), check what each calls a serving.
Method: the 6 Phosphatidylserine products above, compared on label facts, serving size, servings per container, form, price. Not a dosing recommendation.
How these 6 Phosphatidylserine products were ranked
Not one of these 6 phosphatidylserine products could be confirmed in the NSF, USP or Informed Sport registries, so verification separates none of them and the ranking falls to cost per day at the labelled serving. Commission does not enter it: the rate is the same whichever phosphatidylserine you buy. Full methodology.