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High NNMT levels (which naturally happen as we age) can become a problem

When side effects do occur, they are often mild and related to the injection itself, such as redness, pain, or swelling at the injection site

Hydroxycobalamin Hydroxycobalamin injections are a powerful form of vitamin B12 that provides longer-lasting benefits than standard B12 treatments

When tested, none is more effective than the other, providing similar results

GHK-Cu, in contrast, delivers copper(II) ions to metalloenzymes such as lysyl oxidase (critical for collagen and elastin cross-linking), superoxide dismutase (antioxidant defense), and cytochrome c oxidase (mitochondrial respiration)