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Source Naturals



Item: SN119

  • Mood, relaxation & sleep

  • Hypoallergenic

  • 500 mg per capsule

500 mg 60 Caps

Retail $22.50
Save 51%
In Stock
  • Mood, relaxation & sleep

  • Hypoallergenic

  • 500 mg per capsule
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. Source Naturals L-TRYPTOPHAN is extremely pure and is regularly tested to ensure the highest standards of quality.

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

Terms and Ingredient Definitions

Supplement Facts

Serving Size 3 Capsules

Servings Per Container 20

  Amount Per Serving %Daily Value
Iron (naturally occurring) 575 mcg 3%
L-Tryptophan 1.5 g

†Daily Value not established.

Other ingredients: gelatin (capsule), dibasic calcium phosphate, microcrystalline cellulose, silica, and magnesium stearate.

Suggested Use: 1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 capsules before bed.

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


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.

  • HYPOALLERGENIC: contains no yeast, dairy, egg, gluten, corn, soy or wheat.
  • Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.

Shipping Weight

.15 lbs

Source Naturals L-Tryptophan Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

Rated 4.4 out of 5 by 8 reviewers.
Rated 5 out of 5 by It really works I was looking for a natural source to help me to relax and sleep @ night time, and this pill work with excellency without giving me any problems. Easy to swallow, you just have to follow the indication to take it . September 4, 2016
Rated 5 out of 5 by Very Good Product Does exactly what I need it to. It gently helps me sleep better at night. April 24, 2013
Rated 1 out of 5 by ineffective this product did not work at all. I have used another brand and though it costs more at least it worked. January 30, 2012
Rated 5 out of 5 by Great product Very satisfied with this product. Will order again. April 10, 2011
Rated 5 out of 5 by excellent for relaxation This product helps me relax at night so I can get a good night's rest. Amazing product! I wake up refreshed in the morning and not drowsy. September 27, 2010
Rated 4 out of 5 by Good stuff I've been taking it to fall back asleep if I wake up early in the morning, and it has been working just fine. Very good product, highly recommended. October 3, 2009
Rated 5 out of 5 by This has been working well for me in promoting a better quality of sleep. I prefer tabs and am happy with this product. August 1, 2009
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Why Shop Swanson® Brands?

"With my personal 100% money-back satisfaction guarantee, you have nothing to lose and great savings to gain."

Lee Swanson, Founder of Swanson Health Products

Risk-Free Purchase Guarantee on Source Naturals L-Tryptophan

If you are dissatisfied for any reason, we'll give you a full refund and pay return shipping.

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We are dedicated to offering the highest quality products at the best price. Find out more about how we ensure such a high standard in everything we do.

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