Caffeine

* An organic compound that provides antioxidant protection from free radicals

* For more info, read TIA's article about caffeine and skincare.

Functions:

Guaranteed to accompany any candy binge, a caffeine high portends a hard crash. Luckily, when caffeine does not have the same effect when absorbed by the skin. According to Dermaxime.com, caffeine not only aids with the absorption of other ingredients in skin care creams, but the acid in it functions as an antioxidant and may protect against sun-induced skin cancer. Whether delivered orally (in coffee) or topically (in skin cream), caffeine provides antioxidant protection from free radicals.

Also a vascoconstrictor, caffeine tends to reduce puffiness. By increasing blood flow and increasing the lipolytic effect, it blocks enzymes and decreases triglycerides breakage. This anti-inflammatory impact makes a difference when it comes to eye treatments. By constricting the blood vessels in the delicate eye area, caffeine can help temporarily reduce puffiness.

Safety Measures/Side Effects:

Because caffeine is a diuretic, it dehydrates the skin and causes a smoothing effect. This is temporary, however; remember to stay hydrated to counteract caffeine's drying effects. This temporary smoothing effect is one reason caffeine is a popular ingredient in anti-cellulite creams. However, according to Health Central, cellulite is a specific type of fat cell and cannot be dissolved with a skin cream. The dehydration effects of caffeine simply shrink the skin and fat cells, creating a smoother appearance, but no lasting effects.

Recommended Products w/ Caffeine:

Kiehl's Facial Fuel SPF 15 ($20.50), Replenix Retinol Plus Smoothing Serum 10X ($72), Kinerase Clear Skin Regulating Mask ($55)