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[PMC free article: PMC2684818] [PubMed: 18423697] 191

GIP receptors are present in the endocrine pancreas, heart, adipose tissue, brain, lung, kidney, bone, gastrointestinal tract, adrenal glands, and eyes [8]

The human tripeptide GHK and tissue remodelling

Theres no use for them in sports medicine until theyre approved. Do hydrolyzed collagen peptide powders that people mix into their coffee or other drinks work, and are they safe

For treating a deficiency, injections are usually given frequently at the start, for example, several times per week or every other day for a couple of weeks, to quickly build up body stores