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Pure Encapsulations



Item: PRN150

  • Promotes emotional wellness and relaxation

  • Supports sleep quality, onset and duration

  • Hypo-allergenic formula

500 mg 90 Veg Caps

Usually Ships Within 3-4 Business Days

Supplement Facts

serving size 1 capsule

servings per container 90

  amount per serving % daily value
niacin (as niacinamide) 5 mg 25%
Tryptopure™ l-tryptophan 500 mg *
pyridoxal 5'phosphate(activated B6) 5 mg *

*daily value not established

other ingredients: vegetarian capsule (cellulose, water)

Recommendations: As a dietary supplement, take 2-6 capsules daily, in divided doses, between meals.


Tamper Resistant: Use only if safety seal is intact.

Warning: Not recommended for pregnant or lactating women. Do not use concurrently with SSRI medications or MAO inhibitors.

Keep out of the reach of children.

  • Sourced and manufactured to avoid:†
    • Artificial Additives
    • Allergens
    • GMOs
    • Environmental Contaminants
    • Added Excipients
    • †See Ingredients Panel for more information
  • hypo-allergenic dietary supplement
  • recyclable packaging

AJIPURE® and TRYPTOPURE™ are registered trademarks of Ajinomoto AminoScience LLC.

Shipping Weight

.21 lbs

  • Promotes emotional wellness and relaxation

  • Supports sleep quality, onset and duration

  • Hypo-allergenic formula

Pure Encapsulations l-Tryptophan is an amino acid used to help enhance serotonin synthesis for emotional well-being and sleep, including sleep quality, onset and duration. It also helps support relaxation. Each serving delivers 500 mg of Tryptopure™ l-tryptophan as well as 5 mg each of niacin and pyridoxal 5'phosphate (activated vitamin B-6).

Terms and Ingredient Definitions

Pure Encapsulations L-Tryptophan Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

Why Shop Swanson® Brands?

"With my personal 100% money-back satisfaction guarantee, you have nothing to lose and great savings to gain."

Lee Swanson, Founder of Swanson Health Products

Risk-Free Purchase Guarantee on Pure Encapsulations L-Tryptophan

If you are dissatisfied for any reason, we'll give you a full refund and pay return shipping.

Swanson's Standards

We are dedicated to offering the highest quality products at the best price. Find out more about how we ensure such a high standard in everything we do.

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About Swanson
© 2017 Ratings based on results of the 2017 Survey of Supplement Users. More information at
© 2017 Swanson Health Products – Terms of Service