High content of the ACE inhibitory peptide (ASPYAFGL) was isolated from five different species of mushrooms, including straw, enoki, wood ear, oyster, and shiitake mushrooms (Zhang et al., 2017)
As a result, direct oral GSH administration does not result in significant systemic elevation of GSH levels, curbing its utility in treating neurodegenerative diseases
It means you are buying a research-stage peptide product from a brand that describes its manufacturing and testing to documented standards, not an FDA-approved drug with decades of clinical trial data behind it
However, when oxidative stress becomes too high due to external factors like UV rays or processed foods, it can lead to cellular fatigue
Willey A, Mehta S, Lee PK