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Now Foods, L-Phenylalanine, 500 mg, 120 Veggie Caps

Now Foods, L-Phenylalanine, 500 mg, 120 Veggie Caps

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In Stock
  • Expiration Date: Jan 2020
  • Shipping Weight:
    0.14 kg
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  • Product Code: NOW-00132
  • UPC Code: 733739001320
  • Package Quantity: 120 Veggie Caps
  • Dimensions:
    6.4 x 6.4 x 11.2 cm , 0.11 kg
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Save £1.59 when you purchase these items today for only £10.85
Total: £12.44
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Product Overview


  • Nervous System
  • Free-Form
  • Non-GMO
  • A Dietary Supplement
  • Vegetarian - Vegan
  • Amino Acids
  • Family Owned Since 1968
  • GMP Quality Assured

L-Phenylalanine is an essential amino acid that is necessary for the synthesis of protein. Because L-Phenylalanine can be readily converted into the amino acid tyrosine, which forms part of the structure of the neurotransmitters dopamine and norepinephrine, it is important for the maintenance of a healthy nervous system.

Suggested Use

Take 1 capsule 1 to 3 times daily as needed, preferably between meals.

Other Ingredients

Cellulose (capsule).

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.


Settling of powder may occur in the capsule, which is filled by weight without added fillers.

Store in a cool, dry place after opening.

Caution: For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition [e.g. high blood pressure of phenylketonuria (PKU)].

Keep out of reach of children.

Natural color variation may occur in this product.

Supplement Facts
Serving Size: 1 Veg Capsule
  Amount Per Serving %Daily Value
L-Phenylalanine (Free-Form) 500 mg *
*Daily Value Not Established
iHerb Customer Reviews


Posted by 4875441246087508971 on Jun 20, 2017 | Verified Purchase


Thanks for your feedback!

Can be very useful for brain power

Posted by 4831060705902853635 on Jun 11, 2017 | Verified Purchase

Very good nutrient for work or motivation. A lot more safer than other stimulants. My body takes what it needs with amino acids. I take it in the morning, and at 5 pm I take l-Tryptophan for serotonin. I think it is very important to have enough Tryptophan too in the afternoon for mood. Phenylalanine and Tryptophan are a must have!! Fast shipping, good quality, good ingredients. Perfect. Thanks.

Thanks for your feedback!

Works well for me

Posted by 5652441867970854026 on May 31, 2017 | Verified Purchase

I suffer from ME/CFS and I find that phenylalanine helps. Up until now I have been using DL phenylalanine but my osteopath tested me and discovered that I need more L at this point. He tested me with this brand and my test response showed that it would do the trick. I am due for another test in a week and am looking forward to seeing if I need to increase my dose. I ordered this from the UK and it arrived promptly. The price, even with postage, is cheaper than I can get locally.

Thanks for your feedback!

Improves my mood

Posted by 5343655630868221025 on Apr 13, 2017 | Verified Purchase

I'm trying L-Phenylalanine for the first time to help with depression. I started on one capsule per day, taken upon waking, on an empty stomach, 30 minutes before breakfast. I didn't notice any improvement in my mood, so gradually increased the dose. I now take four capsules each morning and the improvement to my mood is obvious. Less than four capsules seems to have no effect on me. I like this particular brand because the capsules contain no fillers or additives, just the active ingredient.

Thanks for your feedback!

Better Than the Rest

Posted by safetytowhere on Mar 18, 2016 | Verified Purchase

Definitely the best brand in terms of potency, though your mileage may vary when it comes to the overall usefulness of phenylalanine as a supplement. It did provide a mood lift for me, but I don't think the recommended 1 capsule dose is likely to make a dent in cases of truly intractable depression and/or ADHD. At least not by itself.

Thanks for your feedback!