PhosphatidylSerine Supplement 300mg Per Serving, 120 Capsules (Phosphatidyl Serine Complex) by Double Wood

Clinical trials typically use 100-300mg daily. Double Wood PhosphatidylSerine 300mg delivers 300mg PS per serving (2 capsules), which we classify as Therapeutic relative to that range.

See the "Also consider" section below for two alternatives. Choose based on form preference (Capsules vs alternatives), dose adequacy, and third-party testing.

Yes — NSF Certified, Third-Party Tested. Third-party testing verifies ingredient identity and label accuracy.

Yes — Amazon Subscribe & Save is available for this product. Enrolling locks in a recurring delivery at a reduced per-unit price.

Yes, phosphatidylserine has a strong safety profile backed by extensive clinical research. Double Wood PS is NSF Certified, which is rare for PS supplements and provides independent verification of purity and potency. The FDA allows a qualified health claim for PS and cognitive decline.

Phosphatidylserine may interact with blood-thinning medications and cholinergic drugs used for Alzheimer's treatment. The 300mg dose can affect neurotransmitter balance. Consult your doctor before combining with anticoagulants, antidepressants, or acetylcholinesterase inhibitors.

Most users tolerate PS well. Occasional reports include mild digestive discomfort or insomnia at higher doses. The 2-capsule serving allows you to start with just 150mg (1 capsule) and increase gradually to the full 300mg dose to assess tolerance.

This product uses soy-derived phosphatidylserine, which may not be suitable for those with soy allergies. It is NSF Certified for purity. If soy is a concern, consider sunflower-derived alternatives like Jarrow Formulas PS 100 with Cogni-PS.

Phosphatidylserine is a natural component of brain cell membranes and is considered safe for long-term daily supplementation. Clinical studies have run 6-12 months without safety concerns. The FDA qualified health claim supports the role of PS in long-term cognitive health.

The full clinical dose is 300mg per serving, which requires 2 capsules (150mg each). Most cognitive studies use 300mg daily. You can start with 1 capsule (150mg) to assess tolerance before increasing to the full 2-capsule serving.