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However, vitamin B12 may give you the appearance of fuller and thicker hair because the increase in oxygen to hair follicles can help stimulate the replacement of lost strands

In these cases, injectable or nasal routes may offer better delivery

Conclusion AHK-Cu has been the focus of several laboratory studies exploring its potential to modulate collagen synthesis, angiogenesis, and hair follicle biology

Because GHK-Cu interacts with regenerative, collagen-related, antioxidant-support, and tissue-maintenance pathways, observed responses may reflect broader physiological-resilience and recovery-focused signaling mechanisms associated with these pathways