It's a compound with a well-characterized mechanism, positive animal data, and a cluster of smaller human studies pointing in the right direction
Moreover, prolonged use of Glutathione showed depleted zinc levels in some individuals
Tsuji-Naito et al 27 demonstrated that DHLHZn (sodium zinc dihydrolipoyl histidinate, compound of Zn2+/dyhydrolipoic acid derivative complex, which was developed for cosmetic/medical use) serves as a potentially effective skin-lightening agent, an effectiveness that is based on the compounds covalent scavenging of DOPAquinone, resulting in depigmentation
Larbig, W., Gerber, W., & Schoenenberger, G
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