Q10: How many clinical trials have been conducted using 5-HTP?
A10: Sixty-three, all reporting no adverse effects in blood chemistry. In 1995, Researchers at the Medical University of Lubeck in Germany gave 39 patients
1,000 mg/day for 10 months.
"Except for minor gastrointestinal side effects in 8 patients that did not cause serious problems in the treatment,
no relevant side effects were noted with long-term administration of the 5-HTP in a dose of 1,000 mg/day. In particular, none of our patients showed symptoms of eosinophilia-myalia syndrome. Eosinophil counts did not consistently rise or fall, and there was no change in routine blood cell counts and in findings from urinalysis, blood chemistry studies, and electrocardiograms.
REFERENCE: "Double-blind crossover study with levorotary form of hydroxytryptophan in patients with degenerative cerebellar diseases."
Wessel, K.; Hermsdorfer, J.; Deger, K.; Herzog, T.; Huss, G. P.; et al.
Arch. Neurol. 52(5):451-455 (1995)
Q11: What is ?Peak X??
A11: Peak X is a peak or blip on a high-pressure liquid chromatogram (HPLC) of an impurity in 5-HTP. 5-HTP from natural sources may have many compounds that are associated with it, and can be considered impurities. The compound that produces Peak X in chromatograms may possibly be 6-hydroxy-1-methyl-1,2,3,4-tetrahydro-beta-carboline, although this has not been confirmed.
Q12: What is ?Peak E??
A12: Peak E is a peak or blip on a high-pressure liquid chromatogram (HPLC) of the contaminated L-tryptophan associated with EMS. There were more than 60 peaks in the chromatograms representing more than 60 impurities. Several of these impurity peaks are statistically associated with the development of EMS. Further studies suggested that the compound responsible for producing Peak E, 1,1'-ethylidene-bis[tryptophan], commonly called EBT, was associated with the development of some ? but not all ? of the symptoms of EMS. Thus, Peak E has come to be considered due to the compound that causes EMS.
Q13: Is Peak X the same as Peak E?
A13: No! Peak E is due to a compound called EBT (1,1'-ethylidene-bis[tryptophan] ), while the compound (or compounds) that produces Peak X could possibly be 6-hydroxy-1-methyl-1,2,3,4-tetrahydro-beta-carboline, it has not been confirmed. However, it has been determined that Peak X is NOT EBT.
FROM:
http://www.solgar.com/qanda.html