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Since growth hormone release is regulated by the hypothalamus and pituitary gland, any influence on these neural systems might indirectly affect GH secretion

It is what the peptide was originally studied for

Choosing poorly here undermines everything downstream

The goal is to dissolve the lyophilized peptide while minimizing unnecessary agitation, contamination, and mechanical stress

When GHK-Cu application stops, copper supplementation ceases potentially reducing these enzymatic activities if dietary copper intake and natural skin copper levels prove insufficient for maintaining treatment-level effects

As you can see, they aren't really competitors