While a recent study demonstrated a lack of correlation between GSH levels in the putamen and body status in patients with PD, whole blood GSH was shown to be sensitive to aging with concentrations being correlated to severity of PD progression (Mischley et al., 2016)
Walker RF, Bercu BB (1998) Comparative effects of GHRH and GHRP2
Rising Adoption in Clinical and Infant Nutrition Clinical applications of L-Carnitine are increasing as hospitals and healthcare providers recognize its benefits in metabolic disorders, cardiovascular health, and recovery therapies
Formally placing the substances on FDA's list of drugs that are safe for compounding would require new regulations, which can take months or years to draft
Supports detox and cellular defense
Injectables (as cyanocobalamin) can be done at your vet's office at home (if you know how to do it)