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Now Foods, L-Tryptophan Powder, 2 oz (57 g)

₴538.72 ₴538.72 (Saved ₴359.76)

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Now Foods, L-Tryptophan Powder, 2 oz (57 g)

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Now Foods, L-Tryptophan Powder, 2 oz (57 g)

In Stock
  • Expiration Date: December 2018
  • Shipping Weight:
    0.11 kg
    Switch to Imperial units
  • Product Code: NOW-00263
  • UPC Code: 733739002631
  • Package Quantity: 2 oz
  • Dimensions:
    5.8 x 5.8 x 10.9 cm , 0.09 kg
    Switch to Imperial 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 one or two 1/4 level teaspoons 2 to 3 times daily on an empty stomach, with final dose at bedtime, or as directed by your physician.

Other Ingredients


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.


Caution: 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 beverages or while operating heavy machinery. Keep out of reach of children.

Do not eat freshness packet enclosed.

This product is sold by weight not volume.

Store in a cool, dry place after opening.


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: 1/4 Level Teaspoons (approx. 1 g)
Servings Per Container: about 57
  Amount Per Serving %Daily Value
L-Tryptophan (Free-Form) 950 mg *
* Daily Value not established.
iHerb Customer Reviews

Bitter taste

Posted by iHerb Customer on April 20 2018 | Verified Purchase

But other than that, it's working. And I was looking for powder as there less other ingredients/chemicals.

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Very bad!

Posted by iHerb Customer on March 1 2018 | Verified Purchase

in this "tryptophan" there is no tryprophan, i experience more serotonin boosting of eating 3 ground nuts that are known for high tryprophan. Waste of money, neve will buy Now Foods again

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Only need a little bit!

Posted by iHerb Customer on February 17 2018 | Verified Purchase

For me, I can't take the recommended amount because it's too much. So, I've cut it down to half the two recommended daily doses.

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Helps to get to sleep

Posted by iHerb Customer on December 10 2017 | Verified Purchase

Though L Tryptophan does not keep me asleep - it helps me get to sleep - along with counting backwards from 100 which keeps me from thinking about things as that will fight the sleep. :)

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It works

Posted by iHerb Customer on December 3 2017 | Verified Purchase

My pup has epilepsy and L-Tryptophan helps to resolve this issue, price is reasonable and it works well, my pup doesn't has epilepsy since he is having it, unless stopped for 4 days epilepsy comes back, so pls try not to be OOS.

Thanks for your feedback!