L-Phenylalanine Powder

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What is L-Phenylalanine?

L-Phenylalanine, commonly referred to as simply Phenylalanine, is an essential amino acid that plays an important part in the formation of neurotransmitters in the brain. It can be found naturally the milk of mammals and in many foods, including eggs, chicken, beef, milk, and soybeans.


L-Phenylalanine helps support brain function and aids in maintaining healthy mood and may promote calm sense of overall well-being. Phenylalanine also supports healthy liver function.

  • Essential amino acid
  • Supports brain function
  • Aids in maintaining healthy mood
  • May contribute to a calm sense of overall well-being
  • Promotes healthy liver function

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.

WARNING: Phenylketonurics - contains phenylalanine
    Supplement Facts
    Serving size: 500 milligrams
    Serving per container: *
    Amount Per Serving % Daily Value**
    L- Phenylalanine 500mg *
    * Daily Value not established.
    ** Based on 2,000 calorie diet


    Sugar, soy, dairy, yeast, gluten and additives.

    As a dietary supplement, take 500mg one to three times daily between meals, or as directed by physician.


    WARNING: Phenylketonurics - contains phenylalanine

      Since this supplement has the potential to have serious effects on neurotransmitters and emotional responses in the brain, it should not be taken by anyone that is already being medicated for psychiatric conditions such as depression. Taking this along with antidepressants could elevate the blood pressure to very dangerous and possibly fatal levels. If you have been diagnosed with Phenylketonuria (a condition that causes the body to improperly metabolize Phenylalanine), this supplement must not be consumed.

      Ignoring the suggested serving size of L-Phenylalanine or taking too much of it over long periods can cause adverse side effects such as headache, heartburn, heightened blood pressure, mood swings, anger agitation, nausea, insomnia, serious nerve damage and problems digesting Tyrosine. Anyone that routinely experiences high blood pressure or serious headaches like migraines should not take this supplement or consume foods that are high in Phenylalanine content. This product should also not be consumed by women who are pregnant or nursing and those with melanoma.


      This vegetarian product dissolves slowly in water. The hotter the water, the more easily this substance dissolves. It has no discernible taste. It should be mixed with water or juice and then consumed.


      There is no guarantee of specific results and results can vary.

      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.

      California residents: Click Here for Proposition 65 warning.

      Customer Reviews

      4.8 Based on 13 Reviews
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      Jeff T.
      United States United States
      I recommend this product

      App and website

      Same as always Products are great!!! New website and new app are difficult to navigate! Would be better to go back to the old alphabetical order list


      perfect for my needs

      I was looking for a new supplier for my amino-acid powders and happily found " Bulk Supplements". I ordered this L-Phenylalanine (to combine with L-Tyrosine) that I take in the morning for mental clarity and I'm very happy with the results and their product.


      It's helping

      Taking at the recommended dosage, within 2 days it has helped increase focus throughout the day and remove the morning fog. And as always, super fast shipping!


      Fast Shipping

      I'm trying this for anxiety & ADHD. Fast shipping

      Joe K.

      L-Phenylalanine 250 grams

      I find L-Phenylalanine powder very helpful in my ADD and keeping me calm and focused through the day. The Bulk pricing is amazing and is much less than that of any prepackaged store brand and I have confidence in what I am getting. I really love this because of the purity and clean packaging. searching the web to find a quality product is daunting but I am grateful for my finding this site with these products.

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