l'glutathione sulfur acceptors for MPST. l-Cysteine (L-Cys), glutathione (GSH) and L-Glutathione — Natural Health Improvement
Description
Read it as what has been reported , not as what is known to be safe long-term

Darker skin tones can take 1224 months of consistent treatment

He developed a method to concentrate and preserve citrus juice for use by sailors

Fact: The response to glutathione varies based on several factors, including your natural skin tone, overall health, metabolism, and how consistently you use it