What can you say about phosphatidylserine in your ads and on your site?

The library supports 1 wording for phosphatidylserine; the strongest is “Helps support cognitive function” (limited, 300 mg a day). Avoid wording that names or implies a disease, a drug or a treatment, such as “Prevents or treats dementia or Alzheimer’s disease”.

Reviewed 15 October 2026

Not legal advice. This guide shows the wording that published evidence supports at a daily dose, from the sources linked below; it is not a ruling on any claim. Your own product, its form and dose, and your own evidence still need to match the wording you use.

Supported wordings

What you can say.

Limited evidenceWording 1

Claims Facts

“Helps support cognitive function.”

Daily dose	300 mg a day
Support	Health Canada lists it at 300 mg a day, but FDA calls closely related evidence very limited and preliminary.
Dose details	Adults 18 and older; Health Canada gives a single daily amount of 300 mg.
Form	Phosphatidylserine from sunflower seed or soy lecithin, or synthetic
Where sources disagree	Health Canada accepts cognitive wording at 300 mg a day for phosphatidylserine from sunflower, soy lecithin or synthetic sources. FDA, reviewing claims that phosphatidylserine lowers the risk of cognitive dysfunction and dementia in the elderly, called the research ‘very limited and preliminary’ and found ‘little scientific evidence’ (2003), and its 2004 letter notes that soy-lecithin and bovine brain-cortex phosphatidylserine may not be the same substance.
Source	Health Canada monograph: Phosphatidylserine

How strong the evidence is

Strong evidence: At least two listed sources support it independently at a comparable dose and form, and none disagrees.
Moderate evidence: One listed source supports it as an evidence-based use at that dose, and no listed source disagrees.
Limited evidence: The only support is traditional use, the sources disagree, or the source itself calls the evidence weak.

Wordings to avoid

What to leave out.

Claims Facts

Ingredient: Phosphatidylserine

Wording to avoid	Reason
“Prevents or treats dementia or Alzheimer’s disease”Names diseases. FDA allows only qualified risk-reduction wording with its disclaimer (see fda_health_claims).	Disease
“Treats ADHD”Names a disorder; no listed source supports it.	Disease

Disease: names or implies a disease. Drug: names a drug or presents the product as one. Treatment: promises to treat, cure or prevent a condition.

Sources

Where this comes from.

All ingredient guides

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