NBC news referenced sources that stated that because of a chemical compound that is found in citrus called furocoumarins which can make skin more sensitive to sunlight and psoralen eating too much citrus containing foods can create a higher risk for getting skin cancer. Both of these compounds interact with ultraviolet light to cause melonoma cells to multiply, and psoralen was used as a tanning activator in suntan lotion. In a study Willett and colleagues looked at more than 100,0000 Americans, 40,0000 men and 60,000 women. Both are complicated and detailed studies that have been going on for 25 years they asked questions about their diet, habits and other personal matters. And it was concluded that overall fewer than two precent of the people in the study got melanoma in 25 years but the risk was 36% higher when they drank 1.6 ounces of a citrus daily compared to those who consumed less. Grapefruit was the most concerning as that is a citrus that contained more psoralens and furocumarins.