NOW Foods Supplements, L-Tryptophan 500 mg,...

Price: $19.92 - $15.40
(as of Dec 24, 2025 12:29:26 UTC – Details)


Encourages Positive Mood* Promotes Restful Sleep* 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. Natural color variation may occur in this product.
Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 2.7 x 2.7 x 4.75 inches; 4.23 ounces
Item model number ‏ : ‎ 0167
Department ‏ : ‎ Health and Beauty>Health and Wellness
Date First Available ‏ : ‎ October 2, 2001
Manufacturer ‏ : ‎ NOW Sports – Nutrition and Wellness
ASIN ‏ : ‎ B0019LWV56
Best Sellers Rank: #9,346 in Health & Household (See Top 100 in Health & Household) #87 in Herbal & Nutritional Sleep Supplements #112 in Sleep & Snoring Aids #960 in Sales & Deals
Customer Reviews: 4.6 4.6 out of 5 stars (5,599) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
An essential amino acid that is not synthesized by the body and must be obtained by diet or supplementation.
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 tested to be free of Peak E and microbial contamination
Take 1-2 capsules 2 to 3 times daily on an empty stomach, with final dose at bedtime, or as directed by your physician
Packaged in the USA by a family owned and operated company since 1968.