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Now Foods, L-Tryptophan, 500 mg, 120 Veg Capsules

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Now Foods, L-Tryptophan, 500 mg, 120 Veg Capsules

In Stock
  • Expiration Date: May 2019
  • Shipping Weight:
    0.35 lbs
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  • Product Code: NOW-00167
  • UPC Code: 733739001672
  • Package Quantity: 120 Veggie Caps
  • Dimensions:
    4.6 x 2.7 x 2.7 in, 0.3 lbs
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Product Overview


  • Supports Relaxation
  • Premium Grade
  • Encourages Positive Mood
  • Promotes Restful Sleep
  • GMP Quality Assured
  • A Dietary Supplement
  • Vegetarian/Vegan

L-Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet. L-Tryptophan is critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function. Every lot of NOW L-Tryptophan is tested to be free of Peak E and microbial contamination.

Suggested Use

As a dietary supplement, take 1-2 capsules 2 to 3 times daily on an empty stomach, with final dose at bedtime, or as directed by your physician. Consider taking these other NOW products: Inositol and Magnesium.

Other Ingredients

Cellulose (capsule), cellulose powder and stearic acid (vegetable source).

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.


Store in a cool, dry place after opening after opening.

For adults only. Consult physician if pregnant/nursing, taking medication (especially antidepressants such as SSRIs and MAOIs), or have a medical condition. May cause drowsiness. Do not use with alcoholic beverage or while operating heavy machinery. Keep out of reach of children.

Do not eat freshness packet. Keep in bottle.

Supplement Facts
Serving Size: 2 Veg Capsules
Servings Per Container: 60
  Amount Per Serving % Daily Value
L-Tryptophan (Free-Form) 1.0 g (1,000 mg) *
* Daily Value not established.
iHerb Customer Reviews

this product is working

Posted by 4673584821035830884 on Jul 15, 2017 | Verified Purchase

I sleep a lot better .

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excellent sleep aid

Posted by iHerb Customer on Jun 29, 2017 | Verified Purchase

if you have trouble getting to sleep L-tryptophan along with magnisiam are excellent safe sleep aids.

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I love this product

Posted by 5397121920711082775 on May 19, 2017 | Verified Purchase

I have been using Tryptophan for a few years and find it gives me consistantly restful sleep with no side effects. It is easy to purchase from iherb and delivery has always been prompt. It is also reasonably priced. Thank you :)

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love this stuff

Posted by 5375783669111175622 on Feb 26, 2017 | Verified Purchase

This is definitely the best tryptophan I've ever taken. Wonderful sleep and mood support supplement.

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Great product

Posted by 5252844991161810676 on Jan 25, 2017 | Verified Purchase

This was suggested to me as I have a difficult time sleeping. It has been so helpful! My Dr. said that I could take up to 6 capsules before bed but I really only need two. I get to sleep quicker and stay asleep longer! I love this product.

Thanks for your feedback!