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Swanson Premium

L-Tryptophan

L-Tryptophan

Item: SW1502

  • L-Tryptophan from Swanson Premium



  • Supports sleep and serotonin levels*



  • 500 mg per capsule


500 mg 60 Caps
Caps Size: 00

$10.99
MSRP $14.99
Save 27%
I would like Free Standard Shipping on orders over $50 with Easy Refill! Plus 10% off future orders!  days. Learn more
Quantity
In Stock

Featured review

"...at Swanson you get better products that really work at a very competitive price, and you can not beat the quality, or the price. With the Premium L-Tryptophan you sleep like a baby and wake up refreshed with no problems..." ~product review by Ttod

See all reviews

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

  • L-Tryptophan from Swanson Premium



  • Supports sleep and serotonin levels*



  • 500 mg per capsule


Looking for effective 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.

Swanson Premium L-Tryptophan Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

L-Tryptophan is rated 4.6 out of 5 by 50.
Rated 5 out of 5 by from Great product! It's great to get this very useful product at a reasonable price.
Date published: 2017-05-29
Rated 1 out of 5 by from 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.
Date published: 2016-12-09
Rated 5 out of 5 by from 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.
Date published: 2015-09-13
Rated 5 out of 5 by from 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.
Date published: 2015-08-13
Rated 2 out of 5 by from 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.
Date published: 2015-06-27
Rated 5 out of 5 by from slows brain chatter Helps fall asleep and stay asleep.
Date published: 2015-06-02
Rated 5 out of 5 by from L-Tryptophan enables me to get to sleep faster and sleep longer each night I use it.
Date published: 2014-12-29
Rated 5 out of 5 by from 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.
Date published: 2014-12-17
Rated 5 out of 5 by from 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.
Date published: 2014-09-17
Rated 2 out of 5 by from 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.
Date published: 2014-08-22
Rated 5 out of 5 by from Great nighttime remedy to help you sleep
Date published: 2014-08-14
Rated 5 out of 5 by from 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!
Date published: 2014-06-12
Rated 3 out of 5 by from 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.
Date published: 2014-02-22
Rated 5 out of 5 by from 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.
Date published: 2014-02-19
Rated 5 out of 5 by from 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."
Date published: 2014-02-17
Rated 5 out of 5 by from Already pruchased for my niece! Has really helped me to feel better. Will always keep some in the cabinet!
Date published: 2013-12-22
Rated 4 out of 5 by from Tryptophan Works well toward relaxing the body but does not put you to sleep
Date published: 2013-12-21
Rated 5 out of 5 by from good product This product really helps me sleep.
Date published: 2013-12-08
Rated 5 out of 5 by from 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.
Date published: 2013-12-04
Rated 5 out of 5 by from Really helps Use a couple of these at bedtime to help me sleep soundly. It really works.
Date published: 2013-11-30
Rated 5 out of 5 by from Love it This & some occasional melatonin have really help make a difference in my ability to get to and fall back sleep.
Date published: 2013-10-30
Rated 5 out of 5 by from L-tryptophan this supplement really helps me with sleep and the price is not too bad either. Swanson products have good prices.
Date published: 2013-10-19
Rated 5 out of 5 by from Unbelievable Best product I have ever used for helping me to sleep. Try it, you wont be disappointed.
Date published: 2013-10-05
Rated 5 out of 5 by from 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.
Date published: 2013-08-28
Rated 5 out of 5 by from 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!
Date published: 2013-07-22
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Our lab evaluates every product to make sure it’s compliant with strict standards and government regulations, and we fully believe in and stand behind our products. If you’re dissatisfied for any reason, we’ll give you a full refund and pay return shipping.

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500 mg 60 Caps
Caps Size: 00

Looks like this is the only size we have. Click here to request a new size.
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*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.

For our website and catalog, the MSRP is the "Manufacturer's Suggested Retail Price." The MSRP is understood to mean the price at which a manufacturer will recommend a retailer sell a product for in stores, on the internet, or in catalogs. The MSRP of National brand items are dictated to Swanson by each manufacturer. For Swanson brand items, the MSRP is calculated based on a varying percentage above the product's base price.

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