It produces the most consistent results, allows precise dose titration, and matches the route used in nearly all preclinical research
Generally, a daily dose of 500-2,000 mg of L-carnitine or acetyl-L-carnitine is considered safe and effective for most adults
Schneider F et al
Copper peptides, and specifically GHK-Cu, are one of the more interesting compounds in that marketplace because they are not new, they are not synthetic, and they have a body of research stretching back over fifty years
Unlike other beneficial natural substances (like collagen), glutathione production declines with age
The ratio of reduced glutathione to oxidized glutathione is often a measure of health, as having high amounts of oxidized glutathione is present in times of extreme stress or injury, shock, and in neurodegenerative diseases