What should you know about keto and constipation?

A ketogenic diet often reduces grains, beans, fruit and some vegetables. If these are replaced mainly with low-fibre foods, stool may become harder or less frequent. Early diet changes can also alter fluid and salt intake, and dehydration can make constipation worse. Constipation may mean hard stools, straining, a feeling of incomplete emptying or fewer bowel movements than usual.

Keto is not the only possible explanation. Irritable bowel syndrome, hypothyroidism, medicines and changes in activity can also affect bowel habits. Diverticular disease is a separate condition and should not be assumed from constipation alone.

Drink fluids regularly unless a clinician has advised restriction. Add tolerated low-carbohydrate fibre sources gradually, such as leafy vegetables, seeds or other foods discussed with a nutrition professional. Gentle movement and a consistent toilet routine can support bowel function. Increase fibre slowly and monitor bloating or pain.

If symptoms began after changing your diet, Nutrition Counselling can help balance carbohydrate limits with fibre, fluids and overall nutrition. Do not rely on repeated laxative use without advice, especially if pain or vomiting is present.

Seek urgent care for severe or worsening abdominal pain, repeated vomiting, a swollen abdomen, inability to pass stool and gas, black or bloody stool, faintness or fever. Arrange medical review when constipation persists, keeps returning, or comes with unexplained weight change, marked fatigue or a new change in bowel pattern.

Ask whether your diet provides enough fibre and fluid, whether a medicine or thyroid problem could contribute, which bowel treatment is suitable, and how long to continue keto if symptoms do not settle.