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Now Foods, L-Tryptophan, Double Strength, 1,000 mg, 60 Tablets

Now Foods, L-Tryptophan, Double Strength, 1,000 mg, 60 Tablets

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In Stock
  • Expiration Date: Dec 2018
  • Shipping Weight:
    0.3 lbs
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  • Product Code: NOW-00169
  • UPC Code: 733739001696
  • Package Quantity: 60 Tablets
  • Dimensions:
    2.4 x 2.4 x 4.4 in, 0.25 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
  • GMP Quality Assured

NOW Double Strength L-Tryptophan has twice the L-Tryptophan (1000 mg per tablet) as in our regular strength product (500 mg per capsule).

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 can help to support 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 combination.

Suggested Use

As a dietary supplement, take 1 tablet 1 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, stearic acid (vegetable source), croscarmellose sodium, magnesium stearate (vegetable source), silica and vegetable coating.

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.

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. Keep in bottle.

Supplement Facts
Serving Size: 1 Tablet
  Amount Per Serving % DV
L-Tryptophan (Free-Form) 1 g (1,000 mg) *
* Daily Value not established.
iHerb Customer Reviews

Good for sleep

Posted by 5113275771700385711 on Apr 18, 2017 | Verified Purchase

Nice priduct, my second time

Thanks for your feedback!


Posted by 5138730944999455860 on Mar 24, 2017 | Verified Purchase

It's good for me. I'm sleep very well

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Posted by 5561646142795126113 on Dec 01, 2016 | Verified Purchase

This is another good all natural sleep aid. I have had a brain anurism (still can't spell) and two strokes. I have difficulty sleeping every since. But with this & the Melatonin has helped me a lot. I am very pleased with both of these products

Thanks for your feedback!

I don't feel a difference

Posted by 5216431609626874923 on Oct 30, 2016 | Verified Purchase

I don't actually feel a difference. I have ordered it for the sleeplessness, but it didn't help. So L- Tryptophan doesn't work for me.

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Helped me to get to sleep.

Posted by 5393777309260806760 on Oct 15, 2016 | Verified Purchase

This item was recommended by a sleep clinic as a natural way to help getting to sleep which i have a problem with.When taken as directed i find it does help for me,but as with any type of remedy it does not always work for every one,but if you do not try it you won' t know if it will work for you.

Thanks for your feedback!