Na2SeO3) was found to protect people from developing Keshan disease but could not reverse heart muscle damage once it had occurred (52)
By removing excess melanin from the skin and preventing new melanin from being produced, skin lightening products and treatments effectively produce a lighter, brighter, more-even toned complexion
When severed nerves in animal models were placed in collagen tubes impregnated with GHK, researchers observed significantly increased nerve outgrowth, elevated production of nerve growth factor (NGF) and neurotrophins NT-3 and NT-4, accelerated regeneration of nerve fibers, and increased axon count and Schwann cell proliferation compared to controls
Ter Arkh
However, another randomized, double-blind, placebo-controlled trial in 181 patients with diabetic neuropathy found that oral supplementation with either 600 mg/day, 1,200 mg/day, or 1,800 mg/day of lipoic acid for five weeks significantly improved neuropathic symptoms (77)
For this group, nasal delivery is sometimes used to: Support respiratory mucosa directly
