The 2013 Leggett paper used a GHRH-receptor-targeted botulinum-neurotoxin construct to further characterise pulsatile-secretion mechanisms (PMID 23825127)
With a blend of glutathione, vitamin C, and alpha lipoic acid, these capsules help to lighten the skin, even out skin tone, and protect against UV damage
Driessen JH
In double-blind, placebo-controlled trials, daily application of GHK-Cu cream at 3% concentration for 12 weeks produced a 70% increase in skin collagen thickness as measured by ultrasound imaging, a 40% increase in skin elasticity, and visible reduction in fine lines and wrinkles
By boosting glutathione levels, these capsules help to brighten the skin, improve skin texture, and reduce the signs of aging