THEY ARE NOT A DRUG, FOOD, OR COSMETICS AND SHOULD NOT BE TREATED AS SUCH
Maquart 1988 J Clin Invest showed that GHK-Cu at nanomolar concentration stimulates type I collagen synthesis by fibroblasts by 60-200 %, of glycosaminoglycans (hyaluronic acid, heparan sulphate) and proteoglycans
[PMID: 13297654] PubMed record related to this compound for laboratory literature review
Li, Z., Wang, X., Teng, D., Mao, R., Hao, Y., Yang, N., et al., Eur
So, if for example you experience worse fatigue after B12 injections, it might be a brief phase where your body is still using the unhealthy red blood cells
The molecule is characterized by molecular formula C201H325N65O67, molecular weight approximately 4598 g/mol, and CAS 2103905-91-3