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When researchers need a well-characterized copper tripeptide with robust published literature, GHK-Cu is the clear choice

Peptides occur naturally in the body but break down quickly after serving their purpose

This is also how researchers were able to discover that GHK declined during the aging process, since the aged cells were not able to begin regeneration until introduced to young blood cells

They are not a standalone solution for any condition

Traditional testosterone therapy replaces your own testosterone, which can suppress sperm production, shrink testicular tissue, create dependency, and lead to hormonal fluctuations