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Known for their antioxidant properties, they are water-soluble, meaning they are quickly metabolized and therefore unlikely to leave a mark on the skin.

Once the body has metabolized the alcohol, there's often a "rebound effect" in which the body tries to compensate for the alcohol-induced changes in physiological functions and sleep.

This sensitivity is in part due to a genetic predisposition estimated to exist in up to 50% of the population that determines whether people metabolize caffeine faster or slower.

When alcohol is metabolized in the body, it breaks down into a chemical called acetaldehyde that can attach itself to DNA.

Only a relatively small amount of ethanol is metabolized in the intestines, where probiotics do their work.