On the other hand, bergamot has health risks. These risks can include an array of skin issues. Consuming too much of bergamot teas can lead to issues with potassium intake. Lowered potassium in the body can lead to experiencing cramping and muscle twitching. In several studies, application of high concentrations of some brands of bergamot oil directly to the skin was shown to increase redness after exposure to ultraviolet light; however, this should not apply to ordinary oral consumption of Earl Grey tea. Bergamot is a source of bergamottin which, along with the chemically related compound 6',7'-dihydroxybergamottin, is known to be responsible for grapefruit–drug interactions in which the consumption of the juice affects the metabolism of a variety of pharmaceutical drugs.