Notably, eight out of nine studies used FC testing with a significant reduction in FC concentration only being observed in UC patients who were on EEN42 and in CD patients who were on an SCD diet.41 Similarly, most studies also measured CRP and found no difference in levels following the diets except for the UC patients in the EEN group, where a reduction in CRP concentration was observed after just 5 days of the 7-day trial. The gene discussed is CRP; the disease is Schnyder corneal dystrophy.