OTX2 restricts entry to the mouse germline
When taken orally, peptides are notoriously unstable and difficult to deliver to the target location, meaning it would be very unlikely that it would reach the nucleus pulposus directly
The authors concluded that GHK and GHK-Cu increased epidermal cell stemness and keratinocyte proliferation, also increasing p63 and integrin expression [ 48 , 49 ]
A: Yes, topical works well for skin benefits specifically
Environmental and molecular mutagenesis , 58 (2), 6071
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