Keto can dramatically improve type 2 diabetes — but it requires careful medical management, especially if you take insulin or certain oral medications.
The case for keto
- HbA1c reductions of 1.0–1.5% in clinical trials
- Significant weight loss without calorie counting
- Many people reduce or stop diabetes medications
- Lower triglycerides, higher HDL
The risks
### Hypoglycemia If you're on insulin or sulfonylureas, cutting carbs without reducing doses causes serious lows. Always coordinate with your doctor first.
### Diabetic ketoacidosis (DKA) Different from nutritional ketosis. Type 1 diabetics on SGLT-2 inhibitors face higher DKA risk on low-carb diets.
### Kidney function If you have stage 3+ kidney disease, the protein and dehydration risk needs monitoring.
### Lipid changes A small subgroup ("lean mass hyper-responders") sees LDL climb significantly on keto. Test lipids at 3 and 6 months.
Who should not try keto without medical supervision
- Type 1 diabetics on SGLT-2 inhibitors
- Anyone on insulin (without dose adjustment plan)
- Pregnant or breastfeeding
- History of disordered eating
- Stage 3+ kidney disease
- Recent gallbladder surgery
The middle path
Many diabetics get most of keto's benefits at 50–100g net carbs/day — a more sustainable "low-carb" approach with less hypo risk.
Talk to your doctor first
This is not optional. Diet changes that affect blood sugar this much need professional oversight.