You can get cat-specific supplements such as Pet-tinic (US), Hemovet or Tonivit (EU), Thorne's B-Complex vet, etc
Cysteine is often considered the "rate-limiting" amino acid for glutathione synthesis
One is dermatology journals, cautious, hedged, full of phrases like "inconclusive" and "further research needed." The other is skin clinics selling injection packages, confident, glossy, and light on caveats
FIGURE 6 Activation of Adaptive Stress Responses by AQ-QI and DEAQ-QI and Effects of GSTP1 The stress responses induced by AQ-QI and DEAQ-QI exposure were measured with a high-content image-based BAC-GFP stress responses reporter assay for oxidative stress, ER stress, DNA damage stress and inflammatory stress ( Figure 2 )
M.LedgerwoodE
Its broad biological activity has made GHK-Cu an important research tool for understanding how cells coordinate repair and remodeling processes