A total of 40 participants were selected and randomized into two sequences in a double-blind, placebo-controlled crossover design, with a one-week washout period between treatments to eliminate carryover effects
Always use methylcobalamin, not cyanocobalamin, as methylcobalamin is pre-activated and immediately available for your body to use, especially important if you have MTHFR genetic variations or methylation issues
If eligible, the physician sends your prescription to the pharmacy
GHK-Cu is studied for collagen synthesis stimulation, wound healing, and skin repair effects associated with firmness, texture, and regeneration
Refines texture without clogging pores 8
Ethics declarations Ethics approval The study protocol was reviewed and approved by the Research Ethics Committee of Henan Agricultural University