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Source Naturals, L-Tryptophan, 500 mg, 120 Tablets

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Source Naturals, L-Tryptophan, 500 mg, 120 Tablets

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Source Naturals, L-Tryptophan, 500 mg, 120 Tablets

In Stock
120 Tablets
120 Tablets
60 Tablets
  • Expiration Date: May 2021
  • Shipping Weight:
    0.3 lbs
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  • Product Code: SNS-01980
  • UPC Code: 021078019800
  • Package Quantity: 120 Tablets
  • Dimensions:
    2.2 x 2.2 x 4 in, 0.25 lbs
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Product Rank:

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Product Overview


  • Dietary Supplement
  • Mood, Relaxation, Sleep
  • Non-GMO Validated

The essential amino acid L-tryptophan helps support relaxation, restful sleep, and feeling better. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response. L-Tryptophan also supports immune functions because it is the body's precursor to the kynurenines that regulate immunity. If needed, L-tryptophan converts to niacin in the body, which supports circulation, a healthy nervous system, the metabolism of food, and the production of hydrochloric acid for the digestive system. Source Naturals L-Tryptophan is extremely pure and is regularly tested to ensure the highest standards of quality.

Suggested Use

1 tablet three times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 tablets before bed.

Other Ingredients

Dibasic calcium phosphate, stearic acid, modified cellulose gum, and silica .

Suitable for vegetarians and Hypoallergenic: Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.


Caution: If you are pregnant, may become pregnant, breastfeeding, or are taking medications such as SSRIs or MAOIs consult your health care professional before using this product.

Store in a cool, dry place.

Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.

Supplement Facts
Serving Size: 3 Tablets
Servings Per Container: 40
  Amount Per Serving %DV
Calcium 52 mg 5%
Iron (naturally occurring) 570 mcg 3%
L-Tryptophan 1.5 g
†Daily Value not established.
iHerb Customer Reviews

Excellent product

Posted by iHerb Customer on March 19 2018 | Verified Purchase

Since using this product i hve been able to sleep peacefully..i had stem cell transplant few years ago n wasn't able to sleep..i was on sleeping medications that harmed my gut n stopped working...however l trypophan is an excellent product..im able to sleep beta..less stress and also cuts the carb cravings..i love this product..i always stock up.. thank you IHerb

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Great Product

Posted by iHerb Customer on January 27 2018 | Verified Purchase

Great product, has helped with my sleep problems.

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Feeling better

Posted by iHerb Customer on January 24 2018 | Verified Purchase

This product gives me a sounder sleep, and does a good job of reducing irritability from low mood .

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Love it

Posted by iHerb Customer on January 6 2018 | Verified Purchase

l-tryptophan is wonderful for anxiety

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be cautious!

Posted by somethingclever on December 24 2017 | Verified Purchase

i took one of these and nearly had a panic attack, my heart was pounding for over an hour. too afraid to take again. be careful if considering

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