No Thanks

Your 10% Off Promo Code is on the Way! Thanks for signing up for emails.

You're now signed up to receive exclusive deals and savings opportunities!

Thanks again for connecting with us. Keep an eye on your inbox — your first coupon is on its way!

Thank You! This email address is already signed up

You are signed up for the following:

  • Offers
  • Recipes
  • E-Newsletter
  • Updates & Reminders

Thank you for your interest and be assured that you will continue to receive our emails at this address.

Look for your next communication from us within the next week.

Oops!

We are having trouble processing your request.

Our apologies!

Please try again later.

Search Please enter an item number or keyword
All
Shop by
Category
Do You
Need Help?

Source Naturals

L-Tryptophan

L-Tryptophan

Item: SN489

  • Supports healthy sleep



  • Promotes relaxation



  • 30 tablets


500 mg 30 Tabs

$9.48
MSRP $12.75
Save 26%
I would like Free Standard Shipping on orders over $50 with Easy Refill!  days. Learn more
Quantity
Usually Ships Within 2-4 Business Days

Supplement Facts

Serving Size 3 Tablets

Servings Per Container 10

  Amount Per Serving %Daily Value
Calcium 52 mg 5%
Iron (naturally occurring) 570 mcg 3%
L-Tryptophan 1.5 g

†Daily Value not established.

Other ingredients: dibasic calcium phosphate, stearic acid, modified cellulose gum, and silica.

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

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

STORE IN A COOL, DRY PLACE.

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

Shipping Weight

.08 lbs

  • Supports healthy sleep



  • Promotes relaxation



  • 30 tablets


L-tryptophan plays a part in the synthesis of both melatonin and serotonin, hormones involved in mood and stress response. It is an essential amino acid that helps support relaxation and restful sleep, as well as immune health. L-Tryptophan from Source Naturals delivers 500 mg per tablet.

Source Naturals L-Tryptophan Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

L-Tryptophan is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Good Suff L-Tryptopahn is excellent in helping me with my work-outs and a restful sleep.
Date published: 2014-04-25
  • y_2017, m_10, d_17, h_19
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_1
  • loc_en_US, sid_SN489, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_swansonhealth
Swanson Quality Assurance

Why Shop Swanson®?

We know how important your health is to you and your loved ones. That’s why we’re focused on delivering only high quality products you can trust at the best value.

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.

Swanson's Standards

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.

Learn More

500 mg 30 Tabs

500 mg 120 Tabs

Customer Service
About Swanson
T M

Easy Refill

  • Get your favorite products delivered automatically
  • 10% off future orders of Swanson brand products in your subscription
  • FREE standard shipping on all future orders over $50
  • Control the frequency, delivery date, item quantity... or cancel at any time
  • Email reminders before each delivery
See all FAQs here