The present disclosure provides new salts of 5-aminolevulinic acid (5-ALA) and new salts of 5-ALA esters, their preparation, formulation and use as photosensitizing agents in photodynamic therapy, diagnosis and cosmetic cares.本公開提供了5-胺基乙醯丙酸(5-ALA)的新鹽和5-ALA酯的新鹽,其製備,製劑,及作為光敏劑在光動力學治療,診斷和美容護理中的用途。