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Swanson Premium



Item: SW1502

  • L-Tryptophan from Swanson Premium

  • Supports sleep and serotonin levels

  • 500 mg per capsule

500 mg 60 Caps
Caps Size: 00

Retail $14.99
Save 33%
In Stock
  • L-Tryptophan from Swanson Premium

  • Supports sleep and serotonin levels

  • 500 mg per capsule

Looking for all-natural sleep support? Swanson Premium offers 500 mg of L-Tryptophan per capsule to help support healthy serotonin levels and provide restful sleep. L-Tryptophan, an essential amino acid, has to be obtained in the diet or in supplement form. Extensive lot tests indicate no Peak-E in this product.

Terms and Ingredient Definitions

Supplement Facts

Serving Size 1 Capsule

  Amount Per Serving % Daily Value
L-Tryptophan 500 mg *

*Daily Value not established.

Other ingredients: Gelatin, brown rice flour, may contain one or both of the following: magnesium stearate, silica.

Suggested Use: As a dietary supplement, take one capsule with water 30–60 minutes before sleeping.

WARNING: Do not take this product if you are pregnant or nursing or taking a prescription antidepressant. Consult your healthcare provider before use if you have a medical condition or if you are taking prescription medications.

Relative Size

Printable Size Guide

Shipping Weight

.15 lbs

Swanson Premium L-Tryptophan Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

Rated 4.6 out of 5 by 49 reviewers.
Rated 1 out of 5 by Not for ME This might work well for someone else but it didn't help me to go to sleep or stay asleep. The next morning I woke up feeling spaced out and I felt nauseous. It took a long time to wear off. Just didn't agree with my chemistry I guess. December 9, 2016
Rated 5 out of 5 by Great Product Good product to take before bed to get a good night's sleep.I cannot take Melatonin and this is a good alternative. September 13, 2015
Rated 5 out of 5 by Works for us! Both my wife and I use Swanson's brand of L-Tryptophan and find it nearly always effective as a sleep aid. Wouldn't be without it. August 13, 2015
Rated 2 out of 5 by Does not seam to improve my delay falling asleep or the quality of sleep compared to other supplements such as Valerian Root and a few others. It also makes me feel weird the next day and I don't like it. The dose is also to low as the recommended dose for sleep is 1-2 grams instead of 500mg. June 27, 2015
Rated 5 out of 5 by slows brain chatter Helps fall asleep and stay asleep. June 2, 2015
Rated 5 out of 5 by L-Tryptophan enables me to get to sleep faster and sleep longer each night I use it. December 29, 2014
Rated 5 out of 5 by I can finally sleep! I was so excited to see tryptophan back on the market! As long as it's available, I will continue to use this product. December 17, 2014
Rated 5 out of 5 by Seems to help sleep I like that this is available in the 500mg dose. 1000mg is usually overkill for this old boy. If taking it for sleep, I recommend also popping a P5P (coenzymated B6 - Swanson makes a good one) and prepared to hit the rack 30 minutes or so after taking it. September 16, 2014
Rated 2 out of 5 by Made me woozy Does relax you before sleep but also makes you a little woozy the next morning and a bit jittery in the early stages of sleep. August 22, 2014
Rated 5 out of 5 by Great nighttime remedy to help you sleep August 14, 2014
Rated 5 out of 5 by Very Helpful! I have been using this product for the past month and have noticed it works very well! I am always pleased with Swanson and the items they carry! If not I know I can send them back. Great customer service! June 12, 2014
Rated 3 out of 5 by Didn't work for us I purchased this product for my wife. For her it doesn't worked and the side effects was bad as in the next day she apparently felt bad. February 21, 2014
Rated 5 out of 5 by Great Product My husband takes these for sleep and if you price them elsewhere, you will be shocked when you see the price here. Another great product at a great price that I don't have to worry about quality since it's a Swanson's product. February 19, 2014
Rated 5 out of 5 by Title:G'Nite - Sleep Tight! Date:February 16, 2014 "I use this product because I sometimes wake up in the middle of the night and cannot go back to sleep. This formula works well for me and also helps me to drop off to sleep faster." February 16, 2014
Rated 5 out of 5 by Already pruchased for my niece! Has really helped me to feel better. Will always keep some in the cabinet! December 21, 2013
Rated 4 out of 5 by Tryptophan Works well toward relaxing the body but does not put you to sleep December 21, 2013
Rated 5 out of 5 by good product This product really helps me sleep. December 8, 2013
Rated 5 out of 5 by great sleep aid I take it nightly and love it. Use to be a really light sleeper not anymore. I only wake up to the sound of my kids now. December 4, 2013
Rated 5 out of 5 by Really helps Use a couple of these at bedtime to help me sleep soundly. It really works. November 30, 2013
Rated 5 out of 5 by Love it This & some occasional melatonin have really help make a difference in my ability to get to and fall back sleep. October 30, 2013
Rated 5 out of 5 by L-tryptophan this supplement really helps me with sleep and the price is not too bad either. Swanson products have good prices. October 19, 2013
Rated 5 out of 5 by Unbelievable Best product I have ever used for helping me to sleep. Try it, you wont be disappointed. October 5, 2013
Rated 5 out of 5 by Effective Product I bought this product to help with sleep. I take 2 at bedtime and it works very well. This product also helped rid me of my sweets habit. August 28, 2013
Rated 5 out of 5 by I am OUT This product has really helped my poor sleep since I started. When I take this I am OUT. I think I'm actually waking up in the morning in the same position that I've fallen asleep. I would recommend anyone who hasn't taken L-Trypt to try it in smaller doses first, though, to make sure you don't end up in hibernation mode! July 22, 2013
Rated 5 out of 5 by L-Tryptophan-good stuff I've purchased and tried the more expense brands of Tryptophan and this one is just as good as those and a much better value. July 6, 2013
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Lee Swanson, Founder of Swanson Health Products

Risk-Free Purchase Guarantee on Swanson Premium L-Tryptophan

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