A June 2022 study published in Cancer Causes & Control found a positive link between eating fish—specifically non-fried fish and tuna—and the risk of developing melanoma, which is the deadliest type of skin cancer.
The study included 491,367 Americans ages 50-71 who were part of the NIH-AARP Diet and Health Study—a research collaboration that began in the 1990s with the goal of examining the link between diet and cancer. Participants recorded their fish intake over the course of 15 years. The group who reported eating the most fish—an average of about 14 grams per day—were 20 percent more likely to develop malignant melanoma.