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But high intake of Folic Acid on its own can cover up an underlying Vitamin B12 deficiency

Copper Peptide Serums What to Look For (And Avoid) GHK-Cu vs AHK-Cu What's the Difference
10.1016/j.ijbiomac.2020.01.239 Int J Biol Macromol

According to the CIRS diagnostic framework, approximately 24% of the population carries specific HLA-DR genetic variations that prevent their immune systems from properly identifying and eliminating biotoxins

This is where the concept of synergy comes in

Because B12 in the blood is continuously removed, the concentration gradient remains relatively constant
