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Jack GS, et al

Activating Your Collagen-Producing Cells Your skin contains specialized cells called fibroblasts, which are basically little factories responsible for producing collagen and elastin

[DOI] [PMC free article] [PubMed] [Google Scholar] 2.Jenner P

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In both in vitro and animal models, changes in signaling pathways and gene expression have been observed within the first 24 hours