MENU Review Article on L-Tryptophan and 5-HTPReview Articles
L-Tryptophan and 5-Hydroxytryptophan (5-HTP) Review Article

Choosing the Best L-Tryptophan and 5-Hydroxytryptophan Supplements

L-Tryptophan Supplements Are Back -- But Are They Safe?  And Do They Work?

Learn More About
 L-Tryptophan and 5-HTP
See the report now

More about this report

L-Tryptophan was a popular sleep aid in the 1980s until over 1,500 people became ill, several dozen died, and L-tryptophan was removed from the market as an over-the-counter product.

L-Tryptophan has made a comeback in recent years and is widely available again. Why? Are the supplements safer than before? Do risks for L-tryptophan remain? provides answers to these and other important questions about L-tryptophan, its effects, and potential side-effects. 

5-HTP, a related supplement with different uses, including a role in treating depression, is also reviewed -- along with potential risks. Due to the difficulty of testing these products for potential impurities (as discussed in the report) did not analyze specific brands of L-tryptophan or 5-HTP.

You must be a member to get the report on L-tryptophan and 5-HTP. In this comprehensive review article, you'll discover:

    • The evidence for and against L-tryptophan and/or 5-HTP for sleep, depression, anxiety, smoking cessation, migraine headache, and weight loss.
    • Dosage for specific uses.
    • Problems caused by L-tryptophan supplements in the past and more recently, what may have caused them, and concerns that remain.
    • Who should be particularly cautious about using L-tryptophan or 5-HTP supplements. 
    • Side-effects and potential drug interactions of L-tryptophan and 5-HTP supplements.
    • Good food sources of L-tryptophan.

See the report now