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For topical GHK-Cu, that usually means applying a small, consistent amount once or twice daily
Each molecule has its unique role in maintaining biological balance, though both support cellular health through different mechanisms
It cannot be sold as a dietary supplement (not a legal dietary ingredient)
Yet decades later, researchers still do not have a clear understanding of how DSIP may work, whether it has a meaningful physiological role in humans, or whether the early findings represent a reproducible biological effect
Xu Z, Wu C, Sun-Waterhouse D, Zhao T, Waterhouse GIN, Zhao M