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M., Barry, A

What sets GHK-Cu apart in the research literature is scale: naturally occurring levels of the peptide in human plasma decline from roughly 200 ng/mL at age 20 to about 80 ng/mL by age 60, a drop researchers have used as a starting point for studying its potential connection to age-related changes in tissue repair

Kossman, D

For vitamin B deficiency (e.g., pernicious anemia), a common regimen is to begin with frequent intramuscular injections to replenish body stores

Kovalchuk V, Nacz KA

Doses in preclinical studies have typically ranged from 10 nanograms to 10 micrograms per kilogram of body weight, administered daily