- 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.
If you’re not 100% satisfied with your product for any reason, we offer a 90-Day Money Back guarantee on all Products purchased through our Website.
You will be responsible for any shipping charges incurred in returning the Product(s). Your refund will be processed once your returned Product(s) has arrived at our shipping facility.
Your guarantee expires ninety (90) days after the shipped date. Please contact our customer service for assistance at 323-667-1894
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations..
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound..