The whitening process starts inside the skin (dermal layer) going outside (epidermal layer), thats the reason why it takes time to be able to see initial change in your skin tone
Serum B12 alone can be misleading, while methylmalonic acid levels offer a more accurate assessment of whether the body is utilizing available B12
Bosco et al., 2003
B12 injections are typically administered either intramuscularly (IM) or subcutaneously, with common sites being the deltoid, thigh, or gluteal muscles
3 percent GHK-Cu creams deliver approximately 30 to 60 times the copper peptide concentration of leading OTC serums (The Ordinary, Biossance, NIOD)
It plays a critical role in recycling other antioxidants like vitamins C and E, maintaining liver health, and defending against oxidative stress that accelerates aging