Keto diet and type 2 diabetes: what to know

When the body has little carbohydrate available, it uses stored fat for energy and makes ketones. Nutritional ketosis is different from diabetic ketoacidosis, a dangerous state in which ketones rise alongside marked insulin deficiency and disturbed body chemistry. A glucose-lowering medicine, especially one that increases insulin release, may cause blood glucose to fall while your eating pattern changes. Kidney disease, pregnancy, dehydration and other health conditions can also affect whether this approach is suitable.

Discuss the plan with the clinician who manages your diabetes before starting. Review your medicines, glucose targets, kidney function and how you will monitor glucose and ketones if advised. Keep fluids available and choose nourishing foods rather than relying on processed high-fat products. Do not stop insulin or other prescribed treatment on your own. A gradual, supervised change makes it easier to identify low glucose, dehydration or side effects.

Seek urgent medical help for repeated vomiting, severe abdominal pain, deep or rapid breathing, unusual sleepiness, confusion or inability to keep fluids down. These symptoms can signal ketoacidosis, particularly when diabetes is present, even if a glucose reading is not very high. Shaking, sweating, weakness or confusion may indicate hypoglycaemia and needs prompt action according to your diabetes plan.

Ask whether your current medicines make ketosis unsafe, how often to check glucose, when ketone testing is needed, and which symptoms should trigger same-day advice. You can also ask for a dietitian referral and a written sick-day plan.