what glutathione does to skin works for by reducing melanin production, which helps lighten the skin and reduce pigmentation. It acts as an antioxidant, protecting the skin from oxidative damage, which can cause aging and Glutathione Tablets For Skin Whitening:

Most of the info I am reading is associated with dogs but it says it is also for cats

Boosting energy and immune function: In addition to their skin benefits, Vitamins injections can also help boost your energy levels and immune function

See common peptide mistakes for more troubleshooting scenarios

The pentapeptide dissolves cleanly in aqueous buffer at neutral pH, with no need for DMSO or other organic co-solvents at typical working concentrations

A: Typically 12-16 weeks after sample confirmation: 7-10 days: Sampling 4-6 weeks: Design & certification 4-8 weeks: Production & shipping Expedited options available