Can you eat fish before a colonoscopy?

Fish is generally considered to be safe to eat before a colonoscopy, as it is a low-fibre food that is easy to digest and does not produce a lot of gas. However, it is important to avoid eating fish that is high in mercury, such as tuna, swordfish, and shark, as these fish can be harmful to your health. Additionally, it is important to avoid eating any fish that is not fresh, as this can increase your risk of foodborne illness. If you have any concerns about what foods to eat or avoid before your colonoscopy, it is best to speak to your doctor or a registered dietitian.