A: GHK-Cu plasma levels decline ~60% between ages 20-60
E.HoytD
The most significant marker, considered a gold standard, was F2-isoprostane and this was significantly more reduced by oral Acetylglutathione than with the IV glutathione.[11],[12] Oral S-Acetyl Glutathione, dosed 200mg daily for 7 days, AM IV 1400mg, single dose Serum and urine tested after 1 week of administration N=6, (4 female, 2 male, average age 45) Markers chosen are measures of Antioxidants F2-Isoprostane is the Gold Standard of oxidative stress markers Conclusion: Oral S-A GSH compares favourably to a one-time, equivalent dose of IV administered Glutathione GSH : Blood levels are lower in the A-GSH group as compared to the IV group because the A-GSH is being taken up by the cell.[13] This is substantiated by the following markers: F2-Iso : (F2- isoprostane ) measurement of redox status and oxidative stress
The FDA has not evaluated these products
Young, D., Deems, R., Deacon, R., McIntosh, R
Tirzepatide is the most direct comparison, operating as a dual GIP/GLP-1 receptor agonist