Here’s some studies about how coffee protects your skin from photodamage:

Coffea Arabica Extract and its Constituents Prevent Photoaging by Suppressing MMPs Expression and MAP Kinase Pathway (2011)

Conclusion: Coffee leaf extract stimulates collagen expression and inhibits UV-induced expression of matrix metalloproteinases (MMPs), the enzymes responsible for breaking down collagen and elastin in skin.


Effect of Caffeine on the ATR/Chk1 Pathway in the Epidermis of UVB-Irradiated Mice (2009)

Note: Article providing a technical overview of how oral and topical caffeine protects against UV-induced skin cancer development in hairless mice experiments by enhancing the removal of DNA-damaged cells, increasing cancer cell death (apoptosis), and inhibiting tumor formation.


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