NOW L-Phenylalanine - 500 mg - 120 Veg Capsules

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Benefits and Results:

  • 500 mg †
  • Free-Form †
  • Nervous System Support †
Frequently Bought Together

NOW Foods L-Phenylalanine - 500 mg - 120 Veg Caps - Amino Acids

What Is NOW L-Phenylalanine?

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

Natural color variation may occur in this product.

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

  • Soy Free
  • Nut Free
  • Vegan/Vegetarian
  • Non-GMO
  • Egg Free
  • Dairy Free
  • Made W/O Gluten


  • L-Phenylalanine (Free-Form)

How do I take it?

Dosage and Directions:

Take 1 capsule 1 to 3 times daily as needed, preferably between meals. Store in a cool, dry place after opening.

What's In NOW L-Phenylalanine?

Supplement Facts / Label (Varies Product to Product):

NOW L-Phenylalanine Supplement Facts

Warnings and Side Effects:

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


PLEASE NOTE: Product images represent the product offered but may not contain exact attributes. Please read the product description for the specific attributes of this product.

†PLEASE NOTE: The intention of the information above is for reference only. It is our goal to maintain and display accurate information. Yet, we can't guarantee it represents the latest formulation of the product. If you have any concerns, please visit the manufacturer's website. The information above is not a representation of our views at Same Day Supplements. These are the views and information provided by the product's manufacturer. The Food and Drug Administration has not evaluated these statements. The intention of this product is not to diagnose, treat, cure or prevent any disease or illness.

*Prices are subject to change at any time and items may limit to stock on hand.


  • Keisuke Ueda, Chiaki Sanbongi, Makoto Yamaguchi, Shuji Ikegami, Takafumi Hamaoka, and Satoshi Fujita (2017 Sep 12) The effects of phenylalanine on exercise-induced fat oxidation: a preliminary, double-blind, placebo-controlled, crossover trial
  • Penelope C. E. Fitzgerald, Benoit Manoliu, Benjamin Herbillon, Robert E. Steinert, Michael Horowitz, and Christine Feinle-Bisset (2020 Jun 16) Effects of L-Phenylalanine on Energy Intake and Glycaemia—Impacts on Appetite Perceptions, Gastrointestinal Hormones and Gastric Emptying in Healthy Males
  • Dongqin Ding, Yongfei Liu, Yiran Xu,1 Ping Zheng, Haixing Li, Dawei Zhang, and Jibin Sun (2016 Aug 25) Improving the Production of L-Phenylalanine by Identifying Key Enzymes Through Multi-Enzyme Reaction System in Vitro
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More Information
SKU NOW-0065
Weight 0.2800
Manufacturer NOW Foods
UPC 733739001320
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Customer Reviews
  1. Love these!
    Overall Product Review
    I purchased this to take for anxiety and for tapering off of antidepressants. It seems to work pretty well for both. I started off taking 1 in the morning and 1 in the evening, but now I just take 1 in the morning. I am taking less as symptoms lessen.

    Review by Missy L.

    Posted on

  2. Energy & Focus
    Overall Product Review
    I suffer from low dopamine. That means I crave a lot of carbs and often feel sleepy. From day one I could feel a difference. Lots more energy and much lower cravings. My whole family now takes it (adults that is). We all feel it helps with concentration, reducing cravings, lowers irritability, and just in general makes you want to do more.

    Review by Sal V.

    Posted on

  3. Highly Recommend
    Overall Product Review
    This amino acid when combined with L-Tyrosine gave me superb amounts of energy the first couple weeks. After that my short term memory increased ten fold. I realized my homework assignments were getting easier to do. My focus and overall mood increased for the better. Highly recommend.

    Review by Jack R.

    Posted on

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