If you have a hereditary predisposition to colon cancer, you may want to slow your roll with junk food. Researchers say that for those with Lynch syndrome, frequent intake of diet soda and fried foods can lead to even greater risk.

Akke Botma and her co-authors from The Netherland’s Wageningen University are the first to connect specific foods with a higher colon cancer risk among those with Lynch syndrome—”a genetic disorder that predisposes people to cancer at younger ages and that affects up to one in 660 people.” For their study, the researchers surveyed 486 participants with the syndrome and found that among four main dietary styles, those who ate mostly junk food were “twice as likely to develop colon tumors.”

The findings from the study were published in the recent issue of the journal Cancer. Professor at Dartmouth College’s Geisel School of Medicine Christopher Amos says that while it is still too soon to base medical advice on the study, it is a stepping stone for more research of this kind.

[via Chicago Tribune]