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Swanson Vitamins

DL-Phenylalanine, 500 mg, 100 Capsules

4.7 · 300 reviews
1,337 ₽

Brain Support Dietary Supplement Total Wellness Since 1969 Unsurpassed Purity & Potency Science-Backed Quality Since 1969 Get 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.

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Brain Support Dietary Supplement Total Wellness Since 1969 Unsurpassed Purity & Potency Science-Backed Quality Since 1969 Get 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.

Customer reviews

5.0
verified purchase
Great product

I take it in the morning on an empty stomach for dopamine and against ADHD good it is working. take 2 grams and see the difference but take it with Tauirine and copper please size and packaging is good.

10/16/2025
5.0
verified purchase
Aminoacid for mood

Phenylalanine is my new discovery amino acid that improves my mood and brings more light sometimes when life circumstances are seems to be overwhelming. Swanson brand has a high quality products and provided this supplement with affordable price. No taste, capsule is relatively big size so I use it with yogurt on empty stomach.

11/12/2024
5.0
verified purchase
Wonderful!

By working to regulate the levels of certain endorphins‚ the d-phenylalaine is believed to relax and calm joints or muscles that are stressed. There is no taste, the packaging is convenient as is the size of the capsules. It helps me with the energy levels and regular trainings. The quality is great.

1/27/2024
5.0
verified purchase
Works for Me

This product is becoming more difficult to find, and I’m so glad iHerb has it! I use this for Chronic Fatigue, and it definitely makes a difference. The packaging is fine, benefits work well for me, and my body definitely knows when I haven’t had my dosage for the day. Will be purchasing again. Goes in the smoothie without altering taste.

12/11/2023
5.0
verified purchase
quality from Swanson as expected

First purchase from this herb platform. Second amino acid purchase from the Swanson brand. A mood pill that works quickly and super effectively. As good as 'prescription medication', if not better. Comparable to the effect of GABA. Your preference depends on you. Delivery took seven days.

9/13/2025
5.0
verified purchase
Прекрасно!

I’ve been using Swanson DL‑Phenylalanine for a few weeks and have noticed a marked improvement in my mood and focus during busy afternoons. The 500 mg capsules are the perfect size, and I haven’t experienced any stomach discomfort. I appreciate that the formula feels clean and effective without any unnecessary fillers. This supplement has become a staple in my daily routine for mental clarity and well‑being!

6/29/2025
5.0
verified purchase
Great!

I love the quality of the supplements on iHerb, this one I felt improvement first day taking it. My brain felt more functional and I felt happier overall!

10/28/2024
5.0
verified purchase
DLPH

Great effect! I am so pleased with this product (Swanson, DL-Phenylalanine). I purchased 2 bottles and I will be back for more, for sure. It helped me with my mental state (it helped a lot with my depression).

5/7/2026
5.0
verified purchase
Impressive product

I bought for my dopamine levels and ı using this brand because of performance and the ingredient high quality is very high really! and I recommend for middle age in everyone. Benefits are very good and size the pill are small and dosage is definitely enough. There is also not bad taste i. İts nice and makes my mood great alsonw package enough for very long time. Its also good for protein synthesis and muscle recovery, it’s also gives you more energy when you in training session. Im happy to add this product in my diet

3/23/2026
5.0
verified purchase
My go to

Best quality for dlpa, this protein is great and benefits for energy and muscle training, the size is good enough with no taste, no nonsense just the ratio of ingredients I needed, package is small and good enough to store healthy diet is necessary but many times we miss some proteins and this one is great, if you have a deficiency you'll probably notice in two days

1/19/2026