While oral supplements provide overall cellular support, topical forms help target external ageing signs like fine lines and dullness directly on the skins surface
HydraFacial: A three-in-one treatment that cleanses, extracts, and hydrates
doi:10.1006/cbir.2002.0861
GHK-Cu Topical Application in Laboratory Research A fair number of published studies test GHK-Cu using topical models, meaning the compound is applied directly to skin tissue samples or animal models rather than studied purely in a cell culture dish
BPC-157: primarily for gut inflammation, tendon and ligament repair
For patients pursuing systemic regenerative protocols, wound healing support, or broader anti-aging applications where body-wide distribution is the goal, injectable has a legitimate clinical role under physician supervision through an accredited compounding pharmacy