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14 reviews
Due to an influx of orders, shipping may be delayed by a couple of days.
What is Phenylalanine?

Phenylalanine, also known as LPA, is an essential amino acid that plays an important part in the formation of neurotransmitters in the brain. It can be found naturally in the milk of mammals and in many foods, including eggs, chicken, beef, and soybeans.

Phenylalanine Benefits

Phenylalanine helps support brain function, aids in maintaining healthy mood, and may promote a 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
Supplement Facts
Serving Size: 500 milligrams
Servings Per Container: -
Amount Per Serving % Daily Value
L-Phenylalanine 500 mg *
* Daily Value not established.
Other Ingredients: None
Free of: Added Sugar, Soy, Dairy, Yeast, Gluten, Additives

Suggested Use: As a dietary supplement, take 500 mg (about 1/5 tsp) one to three times daily, or as directed by a physician.

Store in a dry, cool place


Phenylketonurics - contains phenylalanine

Always consult your health care provider before taking any supplements. Pregnant or lactating women, people with existing medical conditions, or people taking medications should consult their health care provider/s before taking any dietary supplement. If you experience any adverse condition after taking this dietary supplement, discontinue use immediately and consult your health care provider.

Keep out of reach of children.

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.

Customer Reviews
4.9 Based on 14 Reviews
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brett d.
United States United States
Life is good

Works as anticipated

Jeff T.
United States United States
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.