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Oral supplements face challenges in the digestive system, where absorption can be low, mainly in those with certain gut issues
GHK-Cu effects on skin and hair build gradually over the cycle
Intranasal BBB bypass is a validated human pharmacological route actively used for other biologics (e.g., intranasal oxytocin and insulin)
Different mechanisms, overlapping tissue endpoints hence the frequent combination in research protocols
Badenhorst T, Svirskis D, Steinberg C, et al
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