Use one of these guidelines as preparation for colonoscopy:

Recommended diets in gastrointerohepatological diseases

Gluten free diet
Диета кај синдром на иритабилно црево
Диета кај стеатоза
Diet in ulcerous colitis and Crohn's disease
Diet in hiatal hernia
Nutrition in chronic pancreatitis
Nutrition in hepatic encephalopathy and coma
Исхрана на болни со жолчни калкули
Nutrition of patients after stomach surgery
Nutrition of patients with chronic hepatitis
Nutrition of the patient with chronic ulcer of the stomach and duodenum