As many reports have previously indicated, using indoor tanning beds significantly increases the risk of non-melanoma skin cancer. In fact, a new study found tanning beds are responsible for more than 170,000 new cases of skin cancer each year in the U.S. Researchers say people who begin tanning before the age of 25 have an even higher risk of developing basal cell carcinomas, compared to those who never use tanning beds. Previous studies have already shown indoor tanning is a risk factor for malignant melanoma. The deadliest form of skin cancer.