Prediabetes and a Low-Carbohydrate Diet: What to Know

Prediabetes means blood glucose is above the usual range but not in the range used to diagnose type 2 diabetes. Carbohydrates are found in foods such as bread, rice, pasta, potatoes, fruit, beans, milk and sweetened drinks. They are broken down into glucose, so the amount and type eaten can influence after-meal glucose levels.

A lower-carbohydrate pattern is not the same as removing all carbohydrates. Replacing sugary drinks, sweets and highly refined grains with vegetables, pulses, whole-food options and protein can make meals more filling. Unsaturated fats, such as those in nuts, seeds, avocado and olive oil, can also fit into a balanced plan.

Start by recording what you eat and drink for a few days, including portions and snacks. Then make one change at a time: choose water instead of a sweetened drink, add non-starchy vegetables to meals, and pair a smaller carbohydrate portion with protein and fibre. Regular activity and a healthy weight can support the same goals; a weight-management programme may be useful if weight is affecting your health.

Avoid extreme restriction or products that promise a rapid result. Nutrition counselling can help adapt meals to your culture, schedule, preferences and any medicines. If you have kidney disease, are pregnant, or use glucose-lowering medicine, get individual advice before making a major dietary change.

Arrange a clinical review if you have persistent excessive thirst, frequent urination, unexplained weight loss, marked tiredness or blurred vision. These symptoms can occur when blood glucose is high and need assessment rather than a diet change alone. Diabetes screening can clarify your current glucose levels and whether follow-up is needed.

Seek urgent care for vomiting, severe weakness, confusion, difficulty breathing or inability to keep fluids down, especially if you have diabetes or take glucose-lowering treatment. Bring a list of medicines and supplements to your appointment.

Ask which glucose tests are appropriate for you, what carbohydrate pattern fits your health needs, and whether any medicine could make dietary changes unsafe. You can also ask how progress will be checked and when testing should be repeated.