L-tryptophan was discontinued Feb 2016.
See attached label for further information.
- 5-HTP Capsules: https://www.seekinghealth.com/5-htp-100-capsules
- 5-HTP Lozenges: https://www.seekinghealth.com/5-htp-lozenge-100-lozenges
- 5-HTP Extended-Release: https://www.seekinghealth.com/5-htp-extended-release-30-tablets
5-HTP is a derivative of tryptophan, an intermediate in neurotransmitter production from tryptophan. Note that while tryptophan can be used for either neurotransmitter production or niacin synthesis, 5-HTP can only be used for the former. So, the 5-HTP products may not be suitable for those customers who may have been taking the tryptophan to support niacin levels. You consult with a healthcare professional prior to using a new product like 5-HTP, even if you are familiar with taking the tryptophan prior.