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Intramuscular injections go directly into your muscles using a 1-1 needle into muscles located at your shoulder, thighs, hips and buttocks

But research also shows that collagen supplements you take by mouth may help your skin stay moist and elastic, especially if you're older than 30

It does several things at once, and the relative importance of each effect to any given clinical outcome is not yet pinned down

[1] The Human Evidence Gap and Where Research Is Heading The most intellectually honest statement about BPC-157 is this: an unusually robust preclinical literature has established a plausible and broadly consistent mechanistic picture, while the human clinical trial evidence remains essentially absent