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They do not, except at one point of overlap

Which tissues respond best (muscle, endocrine, kidney, brain)

The body essentially uses GHK-Cu as an emergency responder, deploying it wherever tissue regeneration is needed

They support cognitive function and can help reduce feelings of irritability and anxiety, promoting a balanced mood

And if they say yes for some substances, the industry will have to learn the difference between compoundable under 503A in limited circumstances and FDA-approved drug. Those are not synonyms

NAD+ supports metabolism, DNA repair, cell defenses, circadian rhythm coordination and other cellular processes which leads to better quality of life