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

$23.98 $23.98 (Saved $16.01)

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

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$0.20/Veg Caps
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Now Foods, L-Tryptophan, 500 mg, 120 Veg Caps

In Stock
  • Expiration Date: December 2019
  • Shipping Weight:
    0.35 lbs
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  • Product Code: NOW-00167
  • UPC Code: 733739001672
  • Package Quantity: 120 Veg Caps
  • Dimensions:
    4.6 x 2.7 x 2.7 in, 0.3 lbs
    Switch to Metric units

Product Rank:

Frequently Purchased Together
Product Overview


  • Supports Relaxation
  • Encourages Positive Mood
  • Promotes Restful Sleep
  • Non-GMO
  • A Dietary Supplement
  • Vegetarian/Vegan
  • Amino Acids
  • Family Owned Since 1968
  • GMP Quality Assured

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

Take 1-2 capsules 2 to 3 times daily on an empty stomach, with final dose at bedtime, or as directed by your physician.

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.


Do not eat freshness packet. Keep in bottle.

Natural color variation may occur in this product.

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.


While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb.
Supplement Facts
Serving Size: 2 Veg Capsules
Servings Per Container: 60
  Amount Per Serving % Daily Value
L-Tryptophan (Free-Form) 1 g (1,000 mg) *
* Daily Value not established.
iHerb Customer Reviews

A product that works.

Posted by iHerb Customer on March 23 2018 | Verified Purchase

I am very happy with this product. It has improved my sleep significantly. From a satisfied customer.

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The product has not arrived

Posted by iHerb Customer on March 14 2018 | Verified Purchase

I'm sorry to say, but the product did not arrive. how can I get my money back? I have been shopping for the site for almost 3 years and would not like to change suppliers. however, if it is not indemnified, or with the product, or with the return of the money, I will not make any further request in the Iherb.

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very good product

Posted by iHerb Customer on February 4 2018 | Verified Purchase

this product is good for good mood and clever mind..

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Like it has a VEG caps.

Posted by iHerb Customer on January 22 2018 | Verified Purchase

4 stars just because I did not take it like I should - 2-3 times a day , but only once before bed. and don't know how it will work for me , but I do like it is has VEG caps.

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Good product

Posted by iHerb Customer on January 14 2018 | Verified Purchase

My sleep is much better when I take theese. I will stronglo recommend if you have any trouble sleeping. All in all I also feel more balanced. Will continue use this product.

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