About half of kids with epilepsy who start the classic ketogenic diet get stomach problems like constipation, diarrhea, or nausea in the first 3 months, making it the most common side effect.

When children with epilepsy follow a special high-fat diet called the ketogenic diet for more than 3 months, about 44% of them develop stomach problems like constipation, diarrhea, or nausea - these digestive issues are the most common long-term side effects.

About 1 in 4 kids with epilepsy who go on the classic keto diet develop brain-related side effects like headaches or dizziness within the first 3 months, which is the second most common problem they experience.

When kids with epilepsy go on the classic ketogenic diet, most of the side effects they might get can be handled or fixed, and most kids don't have to stop the diet because of really bad side effects.

Kids with epilepsy who try the classic keto diet often get some side effects like stomach problems or tiredness, but these usually go away or can be fixed easily. This means doctors can adjust the diet for each child to help them stick with it and control their seizures better.

A special high-fat, low-carb diet called the ketogenic diet can help people with epilepsy who haven't responded to regular medicines. It works by changing how the brain uses energy, which helps reduce seizures.