At standard doses (12 mg/day), copper loading from GHK-Cu is minimal and unlikely to be clinically significant
The caution is that this whole area still sits on a spectrum from promising to poorly regulated, depending on where and how it is being offered
An explanation of how we came to these new recommendations can be found in Vitamin B12: Rationale for Recommendations
If youve been exploring peptides for skin health, you may have come across GHK-Cu , also known as copper peptide
This comprehensive process, utilizing reagents and instruments from various suppliers including Shenggong (Shanghai) for xylene and paraffin, Dingguo (Beijing) for 4% paraformaldehyde, and both Shenggong and Dexinkang for alcohols, ensures a detailed morphological assessment of the brain tissues response to treatment
Examples include Marmite and Nutritional Yeast