Coffee and skincare has an extended story, with very mixed outcomes. Coffee is acidic and having a large intake can affect your hormones, including stress hormones. These hormones, in turn, have an affect on the skin’s oil production. Coffee can also act as a diuretic and so, cause the skin to feel and become dry, if your coffee consumption is too high.
However, caffeine (a fair amount of which is, of course, in coffee) can be beneficial in skin care. Caffeine can help with issues around cellulite or the appearance of cellulite. Caffeine can be used as an exfoliator : Coffee grounds are rough and help to pull water from the fat layers of the skin, reducing the appearance of cellulite. Of course, Caffeine is a stimulant and stimulates the brain and nervous system making you more active and so, hopefully, more inclined to exercise.
As regards cellulite, caffeine in coffee dehydrates your fatty cells, causing the cellulite to appear diminished and making your skin look much smoother. Studies suggest that skin creams which listed caffeine as an ingredient significantly more effective, of course, this refers to topical application.
Coffee can also help to reduce the appearance of puffiness and dark under-eye circles. From its anti-inflammatory properties, caffeine can helpfully reduce the accumulation of blood under your eyes, so targeting dark circles. That said, dark circles and under-eye puffiness can be caused by a number of factors, including dehydration, sleep deprivation, and allergies. Caffeine cannot diminish dark circles that are caused by any hereditary factors.
Antioxidants are quite rich in coffee and a higher content than even fruits and vegetables. Research suggests that applying coffee on the skin provides a layer of protection from harmful radiation, by inhibiting a certain protein enzyme, thereby possibly even reducing the risk of getting skin cancer. Moreover, coffee’s diuretic properties make it helpful for treating Rosacea, relieving some of the discomfort due to sun damage.
However, like anything else, everything in moderation. As mentioned, coffee is a diuretic so the danger is that of dehydration. Water, as always, should be drunk in abundance - you can never drink too much water!