Skip to main content

Up to 15% off products when you checkout or sign up


  • Gluten free

  • NSF Certified

  • Dairy free

  • cGMP

  • Milk free

Phosphatidylserine (PS) is essential for healthy brain cell membranes and to maintain an environment required for optimal brain function.* Phosphatidylserine improves cell-to-cell communication in the brain, and thus cognitive function, at least in part by increasing cell membrane fluidity.* Other mechanisms of action include enhancing cell metabolism (such as glucose utilization) and neurotransmitter formation.* Phosphatidylserine also appears to have antioxidant activity, which would protect brain cells from free radicals.* Abundant clinical research has shown this nutrient is important in promoting optimal cognitive function, particularly in the aging brain.* Studies show supplementing with phosphatidylserine can lower cortisol spikes in response to stress.* PS modulates cortisol by blunting the release of the hormone in the brain (ACTH) that normally signals the adrenal glands to secrete cortisol.*


Suggested Use / Directions:
Take 1 capsule two to three times daily or as recommended by your health professional.

Serving Size:
One Capsule

Amount Per Serving:

Phosphatidylserine Isolate ... 100 mg


Other Ingredients:
Hypromellose Capsule, Leucine, Microcrystalline Cellulose, Silicon Dioxide.

Gluten Free and Dairy Free


ALLERGY WARNING
This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.

Iso-phos contains an ingredient derived from soy. Iso-Phos contains no soy protein. There are no other soy-based ingredients in Iso-Phos.

PREGNANCY
If pregnant, consult your health professional before using this product.

INTERACTIONS
There are no known adverse interactions or contraindications at publication date.

Phosphatidylserine (formerly Iso-Phos)

Thorne

$68.99

Sign up for exclusive store pricing

Shop the entire wellness catalog, held to a higher standard

Shop practitioner-grade products, each meeting the same bar for quality through Fullscript's standards.

Powered by
Sign up to shop
  • Verified

    Sourced straight from the brand — no resellers or fakes

  • Enhanced testing

    Select products are tested in-house — get exactly what the label promises

  • Stored and shipped

    From certified facilities, to protect product integrity