A new study claims drinking coffee could have some serious health benefits. The Journal of the National Cancer Institute released results on Tuesday that said it may lower the risk of the skin cancer malignant melanoma. Doctors said malignant melanoma is the fifth most common cancer in the U.S. Researchers, some of whom were from Yale in New Haven, said they looked at data from the National Institute of Health-AARP Diet and Health Study, which involved 447,000 non-Hispanic whites. They said that skin tone is at higher risk of skin cancer. Those people answered questions about what they eat, including the drinking of coffee. Researchers said they found that those who drank four cups or more per day had a 20-percent lower risk of developing the skin cancer. They said decaffeinated coffee did not help. Researchers also said they accounted for other factors, like ultraviolet radiation exposure, weight, age, gender, physical fitness, alcohol drinking and smoking. Despite the results being encouraging to java drinkers, the authors cautioned that the results are far from definitive. They said lifestyle and other small protective measures people took could have impacted the findings.