Type 1 diabetes and nutrition

Eating well with type 1 diabetes

A practical approach to carbohydrate counting, balanced eating, glucose management and maintaining a healthy relationship with food.

Reviewed June 2026

There is no single type 1 diabetes diet. People living with type 1 diabetes can eat a varied and enjoyable range of foods. The challenge is learning how food, insulin, activity and other factors interact.

Nutrition care should help you meet your nutritional needs and manage glucose without making food unnecessarily rigid, frightening or complicated.

Type 1 diabetes is an autoimmune condition. It is not caused by eating sugar, and insulin remains essential treatment.

Nutrition priorities for type 1 diabetes

1. Understand carbohydrates rather than avoiding them

Carbohydrate foods are broken down into glucose and usually have the most immediate effect on blood glucose levels. They also provide energy, fibre, vitamins and minerals.

Learning how much carbohydrate is in meals, snacks and drinks can help you match food with insulin more accurately. This is known as carbohydrate counting.

Bread, wraps, rice, pasta and noodles
Breakfast cereals and oats
Potato, sweet potato and corn
Fruit
Milk and yoghurt
Beans, chickpeas and lentils
Biscuits, cakes, sweets and sweetened drinks

Important: The aim is usually to count carbohydrates, not automatically cut them out. Your insulin-to-carbohydrate ratio and insulin timing should be determined with your diabetes team.

2. Consider carbohydrate quality as well as quantity

Two meals may contain a similar amount of carbohydrate but affect blood glucose and fullness differently.

Higher-fibre, minimally processed carbohydrate foods can support digestive, cardiovascular and overall health. Foods with a lower glycaemic index may produce a slower rise in glucose for some people, although portion size, insulin timing and the rest of the meal still matter.

Wholegrain or high-fibre breads
Oats and higher-fibre cereals
Basmati rice, quinoa and other grains
Beans, chickpeas and lentils
Fruit
Milk and yoghurt
Vegetables, including starchy vegetables

3. Include protein regularly

Protein supports growth, muscle maintenance, tissue repair and recovery. Including protein at meals can also make food more satisfying.

Eggs
Fish and seafood
Chicken and lean meat
Milk, yoghurt and cheese
Tofu, tempeh and edamame
Beans, chickpeas and lentils
Nuts and seeds

Important: Protein does not usually cause the same immediate glucose rise as carbohydrate, but large amounts of protein and fat can affect glucose several hours after a meal. Review recurring patterns with your diabetes team rather than making large insulin changes by yourself.

4. Choose fats that support cardiovascular health

People living with diabetes benefit from looking after their heart and blood vessels. Replacing some saturated fat with unsaturated fat can support cardiovascular health.

Extra virgin olive oil
Avocado
Nuts and seeds
Natural nut pastes
Fish, particularly oily fish

Important: Butter, coconut oil, fatty and processed meats, pastries and many takeaway foods are higher in saturated fat. They do not have to be forbidden, but frequency and overall dietary pattern matter.

5. Build meals that are nutritionally complete

There is no single meal pattern that suits everyone with type 1 diabetes. A useful starting point is to combine carbohydrate with protein, vegetables or fruit and a source of healthy fat.

Wholegrain toast with eggs and tomato
Yoghurt with fruit, oats and nuts
A sandwich or wrap with chicken, tuna, egg or tofu and salad
Rice or noodles with vegetables and a protein food
Pasta with lean mince, lentils or beans and vegetables

6. Use glucose information without expecting perfection

Continuous glucose monitoring and blood glucose checks provide useful information, not a judgement about whether you have eaten well.

Glucose responses are influenced by insulin dose and timing, food, activity, stress, illness, hormones, sleep and many other factors. One unexpected result does not mean a food must be removed.

Look for repeated patterns rather than reacting to one reading
Consider meal timing, insulin timing and recent activity
Discuss recurring highs or lows with your diabetes team
Avoid attaching moral labels such as good, bad, clean or cheating to food

Exercise, food and insulin

Exercise can lower, raise or have little immediate effect on glucose depending on the type, intensity and duration of activity, insulin on board, starting glucose and recent food.

Some people require carbohydrate before, during or after activity. Others require an insulin adjustment. These strategies should be personalised with your diabetes team, particularly for prolonged, intense or unfamiliar activity.

Carry fast-acting carbohydrate and ensure the people exercising with you know how to recognise and respond to hypoglycaemia.

Sick days and ketones

Illness can increase glucose and ketone levels even when you are eating less. Everyone with type 1 diabetes should have a personalised sick-day action plan.

Do not stop insulin during illness unless your diabetes team specifically directs you to do so.
Check glucose and ketones as directed in your sick-day plan.
Keep drinking and use carbohydrate-containing fluids when needed.
Have hypo treatment, ketone strips, insulin supplies and emergency contact numbers available.
Contact your diabetes team promptly when ketones, vomiting or glucose levels are not improving.

Protecting your relationship with food

Counting carbohydrates, reviewing glucose data and thinking about insulin around every meal can create a heavy mental load. Food anxiety, rigid rules, binge eating, restriction and insulin omission deserve compassionate support rather than judgement.

Speak with your diabetes team if thoughts about food, body weight or insulin are becoming distressing, or if you are avoiding insulin because of concerns about weight. Early support from clinicians experienced in both diabetes and eating disorders is important.

When can a dietitian help?

Learning or reviewing carbohydrate counting
Understanding food labels and serving sizes
Managing unpredictable glucose responses after meals
Planning for sport, exercise, school, work or travel
Vegetarian, vegan, allergy or intolerance requirements
Coeliac disease or gastrointestinal symptoms
Growth, weight or nutritional concerns
Pregnancy planning, pregnancy or breastfeeding
Frequent hypoglycaemia or fear of hypoglycaemia
Food anxiety, binge eating, restrictive eating or insulin omission

Seek urgent medical help

Follow your sick-day plan and seek urgent assistance for:

Moderate or high ketones that are not improving according to your sick-day plan
Vomiting or being unable to keep fluids down
Rapid or difficult breathing
Severe abdominal pain
Increasing drowsiness, confusion or difficulty waking
Severe hypoglycaemia, seizure or loss of consciousness

Call 000 in an emergency.

References

This information is general and does not replace your personal insulin plan, sick-day plan or advice from your diabetes team.

Resource prepared by Dr Kellie Millard, Accredited Practising Dietitian and Credentialed Eating Disorder Dietitian.