Because that figure comes from rodent research, many start patients at the low end (about 5 mcg/kg or a flat 250 mcg) and adjust over one to two weeks
Vegans, vegetarians, people over the age 50, anyone with stomach/bowel issues like chronic gastritis, leaky gut, IBS or celiac, and anyone who regularly takes medications such as Metformin, PPIs (used for GERD), H2 Receptor Antagonists (used for peptic ulcers), or anything that interferes with stomach acid production are actually at risk for vitamin B12 deficiency, and should supplement B12 regularly
This does not mean GHK-Cu cannot help in these cases, but it frames the starting point more accurately
The only human trial ever registered (NCT02637284) was cancelled in 2016 without publishing results
Its like having a skincare coach guiding you every step of the way
Glutathione injections are mainly used for skin lightening, detoxification, reducing pigmentation, and improving overall skin health