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Phosphatidylserine Dosage in Studies: Numbers and Limits

Quick answer

Phosphatidylserine dosage in studies is usually reported as 100 mg or 300 mg a day. One small trial used both for six months. Those are research numbers, not advice. A capsule with no printed amount cannot be matched to them at all, so check the panel first.

Written by the MemoPryl label deskUpdated · 4 min read

Label A of the MemoPryl bottle: Cognitive Support Formula, 30 capsules
Label A of the MemoPryl bottle (Cognitive Support Formula, 30 capsules). It prints no milligram amount.

What phosphatidylserine dosage did the trial use?

The trial gave soy phosphatidylserine at 100 mg a day to one group and 300 mg a day to another, for six months.

It enrolled 78 adults aged 50 to 69 who had memory complaints. Seventy-three finished. A placebo group was included, and nobody knew who got what (Kato-Kataoka 2010, soy PS trial).

The results were modest. Scores rose in every group, including placebo. Gains over the starting point showed up only in people who began with lower memory scores, mainly on delayed word recall. Across the whole sample, one memory test showed no difference from placebo.

  • Phosphatidylserine

    Amount per capsule unknown
    Used in human studies, a day100 to 300 mg
    On the bottle imagesNot printed

    Study amounts from published trials; each row has its own scale. (Kato-Kataoka 2010, soy PS trial)

  • Ginkgo biloba leaf extract

    Amount per capsule unknown
    Used in human studies, a day240 mg
    On the bottle imagesNot printed

    Study amounts from published trials; each row has its own scale. (DeKosky 2008, GEM trial, JAMA)

  • Bacopa monnieri extract

    Amount per capsule unknown
    Used in human studies, a day300 to 600 mg
    On the bottle imagesNot printed

    Study amounts from published trials; each row has its own scale. (LiverTox, Bacopa monnieri)

  • Acetyl-L-carnitine

    Amount per capsule unknown
    Used in human studies, a day1,000 to 3,000 mg
    On the bottle imagesNot printed

    Study amounts from published trials; each row has its own scale. (NIH ODS, Carnitine)

Gold bars: daily amounts used in human studies; the light part shows the range. The dashed bar is empty because no bottle image prints an amount. No study has tested MemoPryl itself.

Is there a typical phosphatidylserine dose?

Cleveland Clinic cites 100 to 200 mg a day as a typical adult intake. That is a description, not a prescription.

Notice the gap. The trial went up to 300 mg, while the clinic cites a range topping out at 200 mg. No single "right" amount has been settled, because the evidence is thin.

Higher amounts do not come with a safety promise (Cleveland Clinic, Phosphatidyl.).

Do not copy a study number.

Trial capsules were made and checked for the trial. A retail capsule may differ in source, purity and strength. Follow the directions printed on your own bottle, and ask a pharmacist if you are unsure.

How do trial amounts compare with a bottle?

You can only compare them if the bottle prints a milligram figure per serving. Many labels print it only as part of a blend, and some print nothing.

A figure on the label is the company's statement, not a lab result (FDA 101: Dietary Supplements).

Reading amounts: studies versus a label
ItemStudy or sourceMemoPryl images
Amount a day100 mg and 300 mg in the trialNot published
Serving sizeSet by the trialNot published
Source of the ingredientSoy in the trialNot published
Length of useSix monthsNot published

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What does this mean for MemoPryl?

It means you cannot know how MemoPryl's phosphatidylserine compares with any study. The amount is not printed on any image we have.

Phosphatidylserine is one of six names linked to MemoPryl through a sibling pack, and it is unconfirmed for the bottle you receive. Read the panel on arrival. The how to use page walks through directions, and the ingredients page lists all six names.

Keep taking any prescribed medicine, and ask your doctor or pharmacist before you start a new supplement.

Thinking about MemoPryl?Check your medicines with a pharmacist first. Prices and the 60-day window are confirmed at checkout.

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FAQ01

MemoPryl questions people ask

How many milligrams of phosphatidylserine are in MemoPryl?

The amount is not printed on any image we have, so the honest answer is unknown. Six ingredient names are linked to MemoPryl through a sibling pack, but no milligram figure is attached to any of them. Read your bottle's panel.

Does more phosphatidylserine work better?

There is no evidence in the cited trial that a higher amount worked better. Across the whole sample, one memory test showed no difference from placebo. More of a supplement can also mean more side effects, so higher is not safer.

How long did the phosphatidylserine trial last?

The trial lasted six months and used 100 mg or 300 mg a day. It enrolled 78 adults aged 50 to 69 with memory complaints, and 73 finished. That is a small, short study, so treat it as a hint.

Who wrote this02

Written and reviewed by

Written byThe MemoPryl label deskMemopryl.one, Official stocking desk for MemoPryl

Pages built from the bottle images, the seller's product notes and linked NIH, FDA, FTC and peer-reviewed sources.

Medically reviewed byDr. Neelum Aggarwal, MD, PhysicianRole: Medical reviewerReview date: October 19, 2026

Last updated . Learn about our editorial standards and how we check reviews. This website is run by Official stocking desk for MemoPryl, not by the manufacturer or the distributor of the bottle. We make money when you buy through our order links.

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