Question: is 5 htp water soluble?
Answer: 5-hydroxy-L-Tryptophan (5-HTP) is supplied as a crystalline solid. A stock solution may be made by dissolving the 5-HTP in the solvent of choice. 5-HTP is soluble in organic solvents such as methanol and acetic acid (2%). The solubility of 5-HTP in these solvents is approximately 0.1 and 1 mg/ml, respectively.