Life Extension D, L-Phenylalanine, 500 mg, 100 Vegetarian Capsules
— · Item
Prices across 1 retailer
updated dailyCheapest first, using today's offer price where one is running.
Some retailer links are affiliate links — we may earn a commission at no extra cost to you.
Price history
Best price so far: £11.48 at Iherb on 6 Sept 2026
It's at the cheapest we've seen in 90 days.
About this product
Gluten FreeNon GMO LE CertifiedEnhances MoodDietary SupplementWhat Is D, L-Phenylalanine Capsules?Phenylalanine is an essential amino acid, which means your body can’t produce sufficient amounts and requires it from an external source. It’s converted to L-tyrosine in the liver, which is then converted into dopamine, norepinephrine and epinephrine (adrenaline) hormones that can become depleted for a variety of reasons. Replenishing norepinephrine in the brain can support brain health.The neurotransmitters produced from phenylalanine supplementation bring a wide range of cognitive health benefits.D, L-Phenylalanine BenefitsSupports production of L-tyrosine, which is used to make dopamine, norepinephrine & epinephrineHelps promote healthy mood & sleepSupports healthy cognitive functionProvides protection for brain cells