The research team speculates that contaminants in fish – like mercury – could possibly explain the link, but they don’t examine that in the study. The authors don’t recommend eating less fish based on this study alone, as they did not take into account some key risk factors for melanoma, including sun-related behaviours.
This is a companion discussion topic for the original entry at https://www.sciencemediacentre.co.nz/2022/06/10/could-eating-more-fish-raise-your-melanoma-risk-expert-reaction/