Coffee has two main benefits for you skin; brightening your face, and de-puffing your eyes.
Impact of coffee on brightening skin
Impact of coffee on de-puffing eyes
Dermatologist, Julia Hunter, MD, believes that the antioxidants consumed when drinking coffee will brighten and improve skin. As well as this, using a coffee scrub can brighten skin, prevent clogged pores, and soften lines. As well as this, coffee is acidic, and therefore works as a very mild chemical exfoliator. On top of brightening the skin, coffee can help de-puff eyes. The skin under the eyes becomes thinner as we age, meaning that the blood vessels become more visible, leading to puffy eyes and bags. Putting coffee on the skin dehydrates and constricts the blood vessels, making them less visible. For this reason, the majority of beauty products that claim to de-puff and brighten eyes, and reduce bags under the eye will contain caffeine.1
Sources1 Prevention - 6 Surprising Ways Coffee Makes You Prettier