Foods to avoid with diabetes: a complete guide to foods to limit and healthier alternatives
Searching for foods to avoid with diabetes can make diabetes-friendly eating sound more restrictive than it needs to be. Most foods do not have to be permanently excluded, but some foods and drinks are generally better eaten less often, in smaller portions or replaced with more nutritious alternatives.
Foods high in added sugars, highly refined carbohydrates, saturated fat or sodium may deserve particular attention, while portion size can also matter for carbohydrate-rich foods. The reason for limiting a food therefore depends on its nutritional profile, how much is eaten, how often it is eaten and how it fits into the wider eating pattern.
This guide explains the main foods and drinks commonly worth limiting with diabetes, why they may be less suitable as regular choices and practical alternatives to consider. For help comparing everyday options, use food choices for diabetics, while the diabetic food guide provides a broader food-group reference.
Learn which foods and drinks are commonly worth limiting with diabetes, why they may deserve extra attention and what practical alternatives you can choose more often.
Explore our diabetes food guides
Do people with diabetes need to avoid certain foods?
Most people with diabetes do not need a long list of completely forbidden foods. In many cases, it is more useful to distinguish between foods that can form regular parts of an eating pattern and foods that are generally better eaten less often or in smaller amounts.
The reason for limiting a food can vary. Some foods provide large amounts of rapidly available carbohydrate or added sugar, while others may be high in saturated fat, sodium or energy. Portion size, frequency and the rest of the diet also matter.
Individual needs can differ according to medications, activity, nutritional requirements and other health considerations. Foods used to treat hypoglycaemia, for example, are a specific exception because rapidly absorbed carbohydrate may be required.
Limiting foods is different from avoiding them
The words “limit” and “avoid” can imply very different approaches to eating. For many foods, limiting means considering how often they are eaten and the portion size rather than deciding that they can never be included. An occasional food therefore does not need to be treated in the same way as something eaten several times each day.
The reason for limiting a food also matters. A food may deserve attention because it contains substantial added sugar or refined carbohydrate, while another may be high in saturated fat or sodium. Some nutritious carbohydrate-containing foods may simply require portion awareness rather than restriction.
Looking at these differences helps avoid creating a single list in which very different foods are treated as equally unsuitable. Sugar-sweetened drinks, for example, raise different considerations from fruit, legumes or wholegrain foods even though all can contribute carbohydrate.
A practical approach is therefore to consider the food itself, the amount eaten, frequency and the wider eating pattern. This allows foods that deserve more attention to be identified without turning diabetes-friendly eating into an unnecessarily restrictive diet.
When individual needs may change the advice
General food guidance cannot account for every individual situation. Medications, activity, nutritional requirements and other health considerations can affect which foods, portions or meal patterns are most appropriate for a particular person.
Blood glucose responses can also differ between people. Someone who monitors their glucose may find that particular portions or meals affect them differently, but an individual response should be considered alongside the nutritional value of the food and the wider eating pattern.
There are also situations in which general advice to limit rapidly absorbed carbohydrate does not apply. During hypoglycaemia, for example, rapidly absorbed carbohydrate may be specifically required to raise blood glucose, and the person’s recommended treatment plan should take priority.
The purpose of a general foods-to-avoid guide is therefore to identify choices that commonly deserve attention, not to replace individual medical or nutritional advice.
Rather than judging the diet by an occasional food, consider the choices made regularly over time. Food choices for diabetics explains how to compare everyday options, while diet guidance for diabetics covers the broader principles of diabetes-friendly eating.
What foods should people with diabetes limit?
Certain foods and drinks are commonly worth limiting because they may provide large amounts of added sugar, refined carbohydrate, saturated fat, sodium or energy, or because typical portions can contribute substantial carbohydrate.
The main categories covered in this guide are:
- Foods high in added sugars
- Refined carbohydrates and highly processed grain foods
- Highly processed snack foods
- Sugar-sweetened drinks
- Fried foods and foods high in saturated fat
- Highly processed convenience foods
- Large portions of carbohydrate-rich foods
“Limit” does not necessarily mean “never eat”. How often a food is eaten, the amount eaten and the wider eating pattern all help determine how it fits.
Foods high in added sugar
Foods and drinks high in added sugars can contribute substantial carbohydrate and energy while sometimes providing relatively little fibre or other nutritional value. Depending on the food and portion, they can also contribute to a rapid rise in blood glucose.
Examples include sweets and confectionery, cakes, pastries, biscuits, doughnuts, sweet breakfast cereals, chocolate spreads, jams and syrups. Sugar-sweetened drinks are considered separately below because liquid sources of added sugar deserve particular attention.
Added sugar does not have to be eliminated completely. The amount, frequency and wider eating pattern matter, so foods high in added sugar are generally better treated as occasional choices rather than everyday staples.
When comparing sweet foods, check the portion, total carbohydrate and ingredients rather than relying only on claims such as “low fat” or “natural”. Sweeteners for diabetics and Fruits for diabetics provide more detail on alternative ways to add sweetness.
Refined carbohydrates and highly processed grain foods
Refining grains can remove part of their natural fibre and alter their nutritional profile. Foods made predominantly from refined flour or refined grains may therefore provide less fibre than wholegrain alternatives, although individual products vary considerably.
Examples include white bread, some refined breakfast cereals, crackers made from refined flour, pastries and other baked products. White rice and white pasta are also refined grain foods, but portion size and the wider meal remain important when considering how they fit.
Choosing wholegrain or higher-fibre alternatives more often can increase fibre intake, but “wholegrain” does not make portion size or the rest of the nutritional profile irrelevant.
Compare similar products rather than assuming every refined grain food must be excluded. Grains for diabetics explains how whole and refined grains, bread, rice, pasta and cereals can fit into diabetes-friendly eating.
Highly processed snack foods
Some highly processed snack foods combine refined carbohydrates, added sugars, saturated fat, sodium or substantial energy in relatively small portions. Examples can include crisps, sweet biscuits, confectionery, sugary cereal bars, snack cakes and some flavoured crackers or snack mixes.
Processing alone does not determine the nutritional quality of a food. Packaged foods vary considerably, and some convenient snacks can provide useful fibre, protein or unsaturated fats.
When comparing snacks, consider the portion, carbohydrate, fibre, added sugar, saturated fat and sodium where relevant. Nuts, seeds, plain yoghurt, fruit, vegetables with hummus and roasted pulses are examples of alternatives that may provide a different nutritional profile.
The most suitable alternative will depend on what the snack is intended to provide and how hungry the person is. A snack does not need to meet a particular formula, but comparing similar options can help identify choices with more fibre, protein or unsaturated fat and less added sugar, saturated fat or sodium where appropriate.
Sugar-sweetened drinks
Sugar-sweetened drinks can provide substantial amounts of rapidly available carbohydrate without the fibre found in whole carbohydrate-containing foods. Regular fizzy drinks, sweetened fruit drinks, energy drinks, sweetened teas and coffees, some flavoured milk drinks, cordials and squashes can all contain significant amounts of added sugar.
Fruit juice and smoothies also contain carbohydrate and can affect blood glucose even when they do not contain added sugar, so they should be considered according to their ingredients and portion rather than grouped automatically with either water or sugar-sweetened soft drinks.
Water is generally the simplest everyday choice, while unsweetened tea, coffee and other drinks without added sugar can provide alternatives.
Sugar-sweetened drinks have an important exception: they may be used to treat hypoglycaemia because rapidly absorbed carbohydrate is needed. Follow the treatment plan recommended by your healthcare team rather than avoiding sugar when treating a hypo. Drinks for diabetics provides detailed guidance on everyday beverage choices.
Fried foods and foods high in saturated fat
Fried foods do not necessarily have a large immediate effect on blood glucose simply because they are fried, but some fried and highly processed foods can provide substantial saturated fat, sodium and energy. Some also contain refined carbohydrate through coatings, batter or accompanying foods.
Examples can include deep-fried chips, fried chicken, fried snacks, pastries and some fast-food meals. The nutritional profile varies according to the food, cooking fat, preparation and portion.
Choosing grilling, baking, steaming or roasting more often can reduce reliance on deep frying. Replacing some sources of saturated fat with unsaturated fats can also support heart health. Fats and oils for diabetics provides more detailed guidance.
A change in cooking method does not automatically make every food nutritionally balanced, so the ingredients, portion and complete meal still matter. The aim is to reduce reliance on foods high in saturated fat rather than treating all fried food as categorically forbidden.
Highly processed convenience foods
Ready meals, instant noodles, frozen pizzas, takeaway meals and other convenience foods vary considerably. Some can be high in sodium, saturated fat, refined carbohydrate or added sugar, while others may fit reasonably well into a balanced eating pattern.
Convenience itself is therefore not the problem. The nutritional profile, portion and frequency matter more than whether a meal was prepared from scratch.
When comparing packaged meals, use the nutrition information and serving size to assess relevant factors such as carbohydrate, fibre, saturated fat, sodium and added sugars where listed. Adding vegetables or adjusting the portion can sometimes improve how a convenience meal fits into the wider diet.
Convenience foods can also be combined with other foods rather than judged as complete meals in isolation. Adding vegetables, fruit or another suitable side, for example, may help create a more varied meal without requiring every component to be prepared from scratch.
Large portions of carbohydrate-rich foods
Carbohydrate-containing foods do not need to be eliminated from a diabetes-friendly diet, but the amount eaten at one time can influence the amount of carbohydrate in a meal and the resulting blood glucose response.
Portion size can therefore matter for bread, rice, pasta, potatoes, cereals, oats, fruit, milk, yoghurt, legumes and other carbohydrate-containing foods. Many of these foods also provide valuable nutrients, so their presence on this list does not mean they are foods to avoid.
Consider the type of food, portion and complete meal rather than treating all carbohydrate-rich foods alike. Grains for diabetics, Fruits for diabetics, Dairy for diabetics and Legumes and pulses for diabetics provide more specific guidance.
A larger portion is not automatically inappropriate for every person or situation. Individual carbohydrate requirements can vary, so the purpose of portion awareness is to understand how much carbohydrate a meal contains rather than impose one standard serving size on everyone.
These categories show why foods may be limited for different reasons. Added sugar and carbohydrate can matter for blood glucose, while saturated fat, sodium, energy density and overall nutritional quality may be relevant for broader health.
Why do some foods raise blood sugar more than others?
Blood glucose response is influenced most directly by the amount and type of available carbohydrate eaten, but several other factors can affect how quickly and how much glucose rises after a meal.
Relevant factors can include:
- Total carbohydrate
- Portion size
- Fibre content
- Food structure and degree of processing
- Cooking and preparation
- The composition of the complete meal
- Individual differences in glucose response
Carbohydrate amount, type and portion size
The total amount of available carbohydrate eaten is an important factor in the blood glucose response to a meal. Two foods may both contain carbohydrate but provide very different amounts depending on their composition and the portion eaten.
Portion size therefore needs to be considered alongside the type of food. A larger serving generally provides more carbohydrate than a smaller serving of the same food, while different foods can provide substantially different amounts of carbohydrate in apparently similar portions.
Carbohydrate-containing foods also differ in fibre content, food structure and degree of processing. Whole grains, legumes, fruit and dairy foods, for example, have different nutritional profiles and should not be treated as equivalent simply because they all contain carbohydrate.
This is why carbohydrate-containing foods do not need to be categorised simply as foods to eat or foods to avoid. The amount, type and nutritional contribution of the food can all be considered when deciding how it fits into a meal.
Why the complete meal and individual response matter
Foods are often eaten as part of a meal rather than in isolation. The combination of carbohydrate, fibre, protein and fat, together with food structure, preparation and cooking, can influence digestion and the resulting blood glucose response.
Mixed meals can therefore behave differently from an individual carbohydrate food tested on its own. This is one reason why the effect of a complete meal cannot always be predicted from a single ingredient.
Blood glucose responses can also vary between individuals and between different situations for the same person. Portion size, activity, medications and other individual factors may all contribute to these differences.
Where glucose monitoring forms part of an individual’s diabetes management, it can provide information about personal responses to particular meals. This should be interpreted within the person’s wider treatment plan rather than used to label individual foods universally as good or bad.
Glycaemic index can provide additional information about how carbohydrate-containing foods behave under standardised conditions, but it does not describe the complete nutritional quality of a food or predict every individual response.
This is why a food should not be judged only by whether it contains carbohydrate. Food choices for diabetics explains how to compare foods in context, while diet guidance for diabetics covers broader meal-planning principles.
Healthier alternatives to common foods
Choosing an alternative can sometimes increase fibre, reduce added sugar or saturated fat, or improve another aspect of a meal. A swap is not automatically healthier simply because it appears in the right-hand column, so the individual product, portion and personal needs still matter.
The examples below provide practical starting points rather than fixed rules. Some swaps involve choosing a different type of food, while others involve selecting a higher-fibre or lower-sugar version of a similar food.
The most useful alternative will depend on the original food, the rest of the meal and individual preferences. A replacement does not need to be nutritionally perfect to be useful, and familiar foods do not always need to be replaced when adjusting the portion or frequency would achieve the intended goal.
| Instead of | Consider |
|---|---|
| Sugary breakfast cereals | Unsweetened or lower-sugar higher-fibre cereals |
| White bread | Wholegrain or higher-fibre bread |
| Sugar-sweetened soft drinks | Water or unsweetened drinks |
| Sweet biscuits | Nuts, fruit or plain yoghurt |
| Chocolate spread | Nut butter without substantial added sugar |
| Jam | Fresh fruit or a lower-sugar topping |
| Fried snacks | Nuts, seeds or roasted pulses |
| Sugary desserts | Fruit with plain yoghurt |
| Deep-fried foods | Grilled, baked or roasted alternatives |
| Large refined-grain portions | A smaller portion or higher-fibre grain alternative |
These alternatives are options rather than requirements. Sometimes the most practical choice is a different product or cooking method, while in other situations a smaller portion or eating the original food less often may be preferable.
Swaps can also be made gradually. Someone who regularly eats a particular food does not necessarily need to replace it immediately or permanently. Comparing similar products, changing the portion, adjusting how often the food is eaten or changing one part of the meal can all be practical approaches.
Food choices for diabetics provides more guidance on comparing products and making practical swaps.
Frequently asked questions about foods to avoid with diabetes
These common questions look at foods and drinks that may be worth limiting, whether any foods need to be avoided completely, and how portions and practical alternatives can fit into a diabetes-friendly eating pattern.
Should people with diabetes avoid sugar completely?
No. Sugar does not usually need to be eliminated completely, but foods and drinks high in added sugar are generally better eaten less often or in smaller amounts. Total carbohydrate, portion size, frequency and the wider eating pattern all matter.
Sugar also occurs naturally in foods such as fruit and milk, which can provide fibre, protein, vitamins, minerals and other useful nutrients. It is therefore more helpful to consider the complete food and the amount eaten rather than treating every source of sugar in the same way.
Are all carbohydrates bad for diabetes?
No. Carbohydrate-containing foods include grains, legumes, fruit, vegetables and dairy foods that can provide important nutrients. The type and amount of carbohydrate, fibre content, portion and wider meal are more useful considerations than avoiding carbohydrate altogether.
Some carbohydrate foods may deserve more attention because they contain substantial added sugar or are commonly eaten in large portions, while others can contribute fibre and other nutrients. A diabetes-friendly eating pattern can therefore include carbohydrate foods without treating them all as nutritionally equivalent.
Can people with diabetes eat desserts?
Yes. Desserts can fit occasionally rather than having to be permanently excluded. Their carbohydrate content, portion size, frequency and how they fit into the wider eating pattern are more useful considerations than simply labelling all desserts as forbidden.
Desserts also vary considerably. Fruit-based desserts, cakes, pastries, ice cream and other sweet foods can have very different ingredients and nutritional profiles. An occasional dessert does not determine the quality of the overall diet.
What is the worst food for diabetes?
There is no single food that can accurately be described as the worst food for everyone with diabetes. Sugar-sweetened drinks and foods high in added sugar or highly refined carbohydrate may deserve particular attention for blood glucose, while foods high in saturated fat or sodium can matter for broader health.
How often a food is eaten and the amount consumed are also important. It is generally more useful to identify patterns of foods and drinks that deserve attention than to focus on finding one food that everyone with diabetes must avoid.
Are artificial sweeteners better than sugar?
Some artificial and other low-calorie sweeteners can reduce added sugar and carbohydrate when they replace sugar, but their properties and uses vary. Using a sweetener also does not automatically make the complete food or drink nutritionally preferable.
The choice can depend on the particular sweetener, how it will be used and the other ingredients in the product. Sweeteners for diabetics compares the main options and explains their blood sugar considerations and practical uses.
Is fruit too high in sugar for people with diabetes?
Whole fruit can generally form part of a diabetes-friendly eating pattern. Fruit contains naturally occurring sugars and therefore contributes carbohydrate, but it can also provide fibre, vitamins, minerals and other nutrients.
The type, portion and form of fruit can be considered within the wider diet. Whole fruit, fruit juice, dried fruit and fruit products are not nutritionally identical and can provide different amounts of carbohydrate in typical portions. Fruits for diabetics provides detailed comparisons.
Can people with diabetes eat bread, rice and potatoes?
Yes. Bread, rice and potatoes are carbohydrate-containing foods, but they do not need to be excluded automatically. The type, portion and wider meal all matter, and wholegrain or higher-fibre choices can provide more fibre where suitable.
Portion awareness remains relevant even when choosing a more nutritious option. Grains for diabetics provides more detailed guidance on bread, rice and other grain foods, while vegetables for diabetics covers potatoes and other starchy vegetables.
Should people with diabetes avoid processed foods?
Not all processed foods need to be avoided. Processing ranges from simple preparation and preservation to products containing substantial refined carbohydrate, added sugar, saturated fat or sodium, so the word “processed” alone says relatively little about whether a food is suitable.
Frozen vegetables, canned pulses, plain yoghurt and wholegrain bread, for example, are processed foods but can still contribute useful nutrients. Compare the individual product, ingredients, nutrition information and portion rather than judging a food solely according to whether it has been processed.
Is it better to cook at home?
Cooking at home can provide greater control over ingredients, portions and preparation methods, but it is not necessary for every meal to be homemade. Nutritious choices can also be made using convenience foods, ready-prepared ingredients, restaurant meals or takeaways.
What matters is the nutritional profile, portion and wider eating pattern rather than where the food was prepared. Home cooking can be a useful tool, but it should not become another rigid requirement for diabetes-friendly eating.
Foods worth limiting are best considered in context rather than treated as permanently forbidden. Portion, frequency, nutritional quality and the wider eating pattern can all help determine how an individual food fits. The related guides below provide more detailed information about individual food groups and broader diabetes-friendly eating.
Related diabetes food guides
Foods that are commonly worth limiting are only one part of a healthy diabetes-friendly eating pattern. Explore the guides below for more detailed information about fruits for diabetics, vegetables for diabetics, grains for diabetics, dairy for diabetics, nuts for diabetics, seeds for diabetics, legumes and pulses for diabetics, fats and oils for diabetics, condiments for diabetics, herbs for diabetics, spices for diabetics, sweeteners for diabetics, drinks for diabetics and breakfast for diabetics.
You can also explore broader guidance on the best diabetic diet, food choices for diabetics and diet guidance for diabetics, or use the type 2 diabetes diet sheet for practical meal planning. The diabetic food guide provides a food-group reference, while what can a diabetic eat? brings everything together in the site’s master guide.
What can a diabetic eat?
Start with the master guide to diabetic eating, covering food groups, balanced meals, meal planning and clear pathways to every detailed food guide.
Best diabetic diet
Compare different approaches to diabetes-friendly eating, including Mediterranean-style and lower-carbohydrate patterns, with food quality, portions, sustainability and individual needs in mind.
Diabetic food guide
Use a complete food reference organised by food group, with concise category summaries and links to detailed guides on foods and food types.
Diet guidance for diabetics
Learn practical daily eating principles, including balanced meals, carbohydrate choices, portions, meal structure and sustainable diabetes-friendly eating habits.
Food choices for diabetics
Make better everyday decisions through guidance on shopping, food labels, product comparisons, healthier swaps, eating out and balancing meals.
Type 2 diabetes diet sheet
Use a practical framework for planning balanced meals, including meal structure, portion guidance and everyday examples for putting diabetes-friendly eating into practice.
Breakfast for diabetics
Explore healthy breakfast foods and practical meal ideas, including higher-protein, lower-carbohydrate, quick and grab-and-go options for balanced mornings.
Condiments for diabetics
Compare sauces, spreads, dressings and seasonings, with guidance on added sugar, salt, portions and practical diabetes-friendly choices.
Dairy for diabetics
Compare milk, yoghurt, cheese and dairy alternatives, considering carbohydrates, added sugar, protein, saturated fat and suitable portions.
Drinks for diabetics
Compare water, tea, coffee, milk, juices, smoothies, sweetened drinks and alcohol, with guidance on hydration and healthier beverage choices.
Fats and oils for diabetics
Compare cooking oils and fats, with guidance on unsaturated and saturated fats, portions, cooking methods and heart health.
Fruits for diabetics
Compare suitable fruits, serving sizes and glycaemic impact, with guidance on fresh, frozen, canned and dried fruit and practical portions.
Grains for diabetics
Explore rice, oats, barley, quinoa, bread, pasta and cereals, with guidance on whole versus refined grains, serving sizes and portions.
Herbs for diabetics
Explore basil, coriander, mint, parsley, oregano and other herbs, including fresh and dried forms and practical ways to use them.
Legumes and pulses for diabetics
Learn about beans, lentils, chickpeas and peas, including their fibre, protein and carbohydrate content, portions and practical meal ideas.
Nuts for diabetics
Compare individual nuts, their healthy fats and nutrients, suitable portions and varieties without excessive salt, sugar or added coatings.
Seeds for diabetics
Learn about chia, flax, pumpkin, sunflower and sesame seeds, including their nutrition, portions and simple uses in meals and snacks.
Spices for diabetics
Explore cinnamon, turmeric, ginger, cumin, black pepper and other spices, with guidance on everyday use, blends and blood sugar considerations.
Sweeteners for diabetics
Compare stevia, monk fruit, sugar alcohols, artificial sweeteners and other alternatives, including blood sugar considerations, limitations and everyday use.
Vegetables for diabetics
Compare non-starchy and starchy vegetables, their fibre and carbohydrate content, suitable portions, cooking methods and meal ideas.
These guides can help place foods worth limiting within the wider context of diabetes-friendly eating. Use them to compare food and drink groups, explore practical alternatives, understand portions and nutritional differences, and build an eating pattern that does not depend on rigid lists of forbidden foods.
Final takeaway
Foods to avoid with diabetes are better understood as foods and drinks that may be worth limiting rather than a universal list of foods that must never be eaten. Added sugar, refined carbohydrate, saturated fat, sodium, portion size and overall nutritional quality can all influence why a particular food deserves attention.
The reason for limiting a food also matters. Sugar-sweetened drinks and large amounts of rapidly available carbohydrate can be particularly relevant to blood glucose, while saturated fat and sodium are important for broader cardiovascular health. Other nutritious carbohydrate-containing foods may simply require consideration of portion size rather than avoidance.
Practical alternatives can help, but a healthier eating pattern does not require replacing every occasional food with a supposedly perfect substitute. Food choices for diabetics explains how to compare everyday options, while diet guidance for diabetics provides the broader principles for building meals and eating patterns.
The choices made regularly over time matter more than an occasional food. Rather than trying to follow a rigid list of forbidden foods, focus on the foods and drinks eaten most often, appropriate portions and practical changes that can improve the overall eating pattern.
For the site’s complete overview of foods and food groups, continue with what can a diabetic eat?