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Source Naturals

DLPA DL-Phenylalanine

Item | SN592

  • A 50/50 blend of the D- and L- form of the amino acid phenylalanine



  • A precursor to two neurotransmitters that help support an alert state



  • 375 mg per tablet


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Supplement Facts

Serving Size 2 Tablets

Servings Per Container 60

Amount Per Serving   % Daily Value
Calcium 86 mg 9%
DL-Phenylalanine 750 mg

†Daily Value not established.

Other ingredients: dibasic calcium phosphate, sorbitol, stearic acid, magnesium stearate, colloidal silicon dioxide, and modified cellulose gum.

Suggested Use: 1 to 2 tablets 1 to 2 times daily.

WARNING: Contains phenylalanine. Not to be used by phenylketonurics, women who are pregnant, may become pregnant, or breastfeeding, or with antidepressant drugs such as MAOIs or SSRIs. If you have chronic high blood pressure, take after meals and/or consult your health care professional.

Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.

  • A 50/50 blend of the D- and L- form of the amino acid phenylalanine



  • A precursor to two neurotransmitters that help support an alert state



  • 375 mg per tablet


Source Naturals DLPA DL-Phenylalanine is an equal blend of the D- and L- forms of the amino acid phenylalanine. Some researchers believe that D-phenylalanine (DPA) inhibits the action of an enzyme that breaks down endorphins and enkephalins, which are proteins that bind to opioid receptor sites in the brain. DPA may extend the life of endorphins and enkephalins, which are known for their positive influence on comfort levels.

Terms and Ingredient Definitions

Shipping Weight: .26 lbs

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

MSRP: $19.50

For our website and catalog, the MSRP is the "Manufacturer's Suggested Retail Price." The MSRP is understood to mean the price at which a manufacturer will recommend a retailer sell a product for in stores, on the internet, or in catalogs. The MSRP of National brand items are dictated to Swanson by each manufacturer. For Swanson brand items, the MSRP is calculated based on a varying percentage above the product's base price.

Disclaimer: Product reviews are provided for informational purposes only. The information or opinions expressed therein are solely those of the contributors and do not necessarily represent those of Swanson Health Products and its employees. Please read full product reviews disclaimer.

Swanson Health started in 1969 in Fargo, ND with a mission to offer pure and potent health products at a great value. Over 50 years later, we continue to innovate science-backed vitamins and supplements, delivering wellness solutions that help people live simply healthier together, and find vitality at any age. Click here to learn more about us.

For over 50 years, Swanson Health's research and development team has delivered science-backed health and wellness products to people around the world. Our innovation is guided by clinical research, scientific consensus, emerging research and usage traditions, creating products that help you find vitality at any age. At Swanson, we don't hide our science behind proprietary formulas — we believe in easy-to-read, transparent labelling. What's printed on our labels, is exactly what you'll find in our products.

Swanson Health's purity and potency testing begins with our ingredient sourcing, continues through manufacturing, and goes beyond when a product hits the shelf. Our testing exceeds industry standards, ensuring each product meets our quality guarantees for purity and potency. Swanson facilities are Good Manufacturing Practices (GMP) certified, and we voluntarily participate in third-party, independent laboratory testing. With Swanson, you can be sure you're getting the most pure and potent health products at a great value. Click here to learn more about our quality standards.

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