Swanson Vitamins DL-Phenylalanine, 500 mg, 100 Capsules
100 capsules · Capsules
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Price history
Best price so far: £9.66 at Iherb on 6 Sept 2026
It's at the cheapest we've seen in 90 days.
About this product
Brain SupportDietary SupplementTotal Wellness Since 1969Unsurpassed Purity & PotencyScience-Backed Quality Since 1969Get a nutritional boost with Swanson DL-Phenylalanine (DLPA)! A great source of amino acid precursors for neurotransmitters that support brain health, DL-phenylalanine is an essential amino acid that cannot be made in the body and must be supplied by food. Your body converts phenylalanine into L-tyrosine, which is then used to make dopamine, norepinephrine and adrenaline. Supplementing with phenylalanine may support a positive outlook.