Avoid high-protein diets
Additionally, avoid high-protein diets. Lots of dietary protein can cause higher concentrations of oxalate in the urine and can also lead to lower concentrations of magnesium and calcium. This is doubly harmful since magnesium and calcium bind to oxalate and reduce its availability and also because available oxalate stays in the GI tract. Lastly, high-fat diets may increase inflammation for those with Crohn’s. According to a study published in 2015, while many physicians encourage taking an omega-3 supplement for Crohn’s, be sure that it does not contain omega-7 fatty acids, as they may trigger inflammation.