The Ketogenic diet has become one of the most popular eating plans for people looking to lose weight or manage their diabetes. But can very low carbs and high fats raise your cancer risk? There is no simple answer to this as many headlines would have it. Research has been done on the potential benefits of Keto for some cancer type. Few have highlighted concerns about long-term dietary patterns, processed foods and nutrient deficiencies.
What is the keto diet?
A ketogenic diet is rich in fat and low in carbohydrates. It includes:
Eggs
Meat and fish
Dairy products
Nuts and seeds
Avocados
Non-starchy vegetables
Eating things like bread, rice, pasta, sugary foods, and most fruits is typically restricted to keep the body in a state of ketosis.
Does the keto diet increase cancer risk?
Right now, there is no evidence that the keto diet has a link with cancer. There are several risk factors associated with cancer, such as age, genetics, smoking, alcohol, obesity, physical inactivity, and exposure to the environment. Focusing on food that is rich in nutrients can make the diet healthier and more balanced.
Keto Diet - Cure or Prevention?
A 2026 study published in the journal Nature found that a ketogenic diet in genetically susceptible mice to intestinal cancer actually promoted tumour development in the small intestine, but slowed it in the colon.
A ketogenic diet is not suitable for everyone. Talk to your doctor before beginning keto if having cancer treatment. The ketogenic diet is not directly connected to cancer. Meanwhile, the evidence to suggest it's a form of cancer prevention or treatment is insufficient.
Instead of focusing on a specific diet, concentrate on a healthy, balanced diet filled with nutritious fats, vegetables, and little processed foods. For people undergoing cancer treatment, always speak to a doctor or registered dietitian before starting a ketogenic diet to ensure that it is nutritionally adequate and safe.