Diabetes Diet: Foods to Avoid, What to Limit and What to Choose Instead
Living with diabetes doesn’t mean you can never enjoy your favourite foods again. However, what you eat and how much you eat can have a significant effect on your blood glucose levels.
Certain foods and drinks are particularly high in added sugars, refined carbohydrates, saturated fat, or calories and may make blood sugar management more difficult when consumed frequently or in large portions.
Rather than thinking about diabetes as a life sentence of a list of foods you can never eat, it’s more helpful to understand which foods to limit, what to choose more often, and how portion size affects your blood sugar.
Diabetes affects people differently. Your dietary needs may also depend on the type of diabetes you have, your medications, other health conditions, and your individual blood glucose targets. Use this guide as general information, not as a substitute for personalised advice from your doctor, dietitian, or other qualified healthcare professional.
Diabetes Diet: How Does Food Affect Blood Sugar?
When you eat carbohydrates, your body breaks them down into glucose, which enters the bloodstream.
Foods containing carbohydrates can therefore raise blood glucose levels. However, the amount and type of carbohydrate, portion size, fibre content, and what you eat alongside the carbohydrate can all influence how quickly and how much your blood sugar rises.
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This is why managing diabetes isn’t simply about eliminating sugar.
A balanced approach considers:
- Carbohydrate quantity
- Portion size
- Fibre
- Protein
- Healthy fats
- Overall meal composition
- Individual blood glucose response
Here is a list of foods and drinks to avoid for a diabetes diet
1. Sugary Drinks
One of the easiest sources of excess sugar to overlook is beverages.
Examples include:
- Regular soft drinks
- Sweetened fruit drinks
- Energy drinks
- Sweetened iced tea
- Flavoured drinks
- Sweetened coffee beverages
- Some packaged juice drinks
Liquid carbohydrates can be absorbed relatively quickly and may cause a rapid rise in blood glucose. Instead of these, consider:
- Water
- Unsweetened tea
- Unsweetened coffee
- Sparkling water without added sugar
- Water flavoured naturally with fruit or herbs
2. Sweets, Cakes and Pastries
Foods such as:
- Sweets
- Chocolate bars
- Cakes
- Doughnuts
- Biscuits
- Cookies
- Sweet pastries
can contain substantial amounts of added sugar and refined carbohydrates.
They can also be high in saturated fat and calories.
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This doesn’t necessarily mean these foods must be completely eliminated. Depending on your diabetes management plan, they may occasionally fit into your diet in small portions. Instead of making these foods everyday staples, consider the following:
- Keep portions small.
- Eat them less frequently.
- Pair carbohydrate-containing foods with protein or fibre where appropriate.
- Consider lower-sugar alternatives.
3. Refined Carbohydrates
Refined carbohydrates have had some of the grain’s natural components removed during processing.
Common examples include:
- White bread
- White rice
- Regular pasta
- Many highly processed breakfast cereals
- Refined flour products
These foods can contain substantial amounts of carbohydrate while providing less fibre than their whole-grain alternatives. Where appropriate, consider:
- Whole-grain bread
- Brown rice
- Whole-wheat pasta
- Oats
- Higher-fibre cereals
- Whole grains such as millet or sorghum
Portion size still matters. Even nutritious carbohydrate-rich foods can raise blood glucose when eaten in large quantities.
4. Highly Processed Snack Foods
Many packaged snacks are high in refined carbohydrates, sodium, saturated fat, or added sugar.
Examples include:
- Crisps
- Sweet biscuits
- Flavoured crackers
- Sugary cereal bars
- Packaged cakes
- Some flavoured popcorn products
These foods can be easy to overeat because they are convenient and highly palatable. However, you might want to consider:
- Unsalted nuts
- Seeds
- Fresh fruit
- Plain yoghurt
- Vegetables with a suitable dip
- Air-popped popcorn without excessive added sugar or salt
5. Processed Meats
Foods such as:
- Sausages
- Hot dogs
- Bacon
- Ham
- Luncheon meats
- Other processed meat products
may contain significant amounts of sodium and saturated fat.
Regularly eating large amounts of processed meat isn’t generally recommended as part of a heart-healthy diet, which is particularly important because people with diabetes can have an increased risk of cardiovascular disease. Consider including more:
- Fish
- Beans
- Lentils
- Eggs
- Skinless poultry
- Lean, minimally processed meats
6. Foods High in Saturated and Trans Fats
Diabetes management isn’t only about blood glucose. Cardiovascular health matters too.
Frequently eating foods high in unhealthy fats can contribute to unhealthy cholesterol levels and cardiovascular risk.
Limit foods such as:
- Deep-fried foods
- Fatty cuts of meat
- Commercially baked pastries
- Foods containing partially hydrogenated oils
- Excessive amounts of butter or other foods high in saturated fat
Instead of these, use healthier sources of fat like:
- Avocado
- Nuts
- Seeds
- Olive or other unsaturated vegetable oils
- Fatty fish
where appropriate.
7. Deep-Fried Foods
Fried foods can be high in calories and unhealthy fats.
Common examples include:
- Fried chicken
- Fried plantain
- French fries
- Fried pastries
- Doughnuts
- Some fast-food meals
The issue isn’t simply that these foods are “fried”. Frequent consumption can contribute to excessive calorie intake and may make it harder to maintain a healthy weight and cardiovascular health. Better cooking methods include:
- Grilling
- Baking
- Steaming
- Boiling
- Roasting
- Air frying with minimal added oil
8. Large Portions of Starchy Foods
Many foods commonly eaten in Nigeria can form an important part of a balanced diet but contain substantial amounts of carbohydrates.
Examples include:
- Rice
- Yam
- Potatoes
- Sweet potatoes
- Cassava
- Garri
- Fufu
- Eba
- Amala
- Semovita
- Plantain
The goal isn’t necessarily to eliminate these foods.
Instead, portion control matters.
A meal containing a large portion of a starchy food with little protein, vegetables, or fibre may cause a larger rise in blood glucose than a more balanced meal. Consider making a more balanced plate:
- About half the plate: non-starchy vegetables
- About one-quarter: protein
- About one-quarter: carbohydrate-rich or starchy food
Exact portions should be personalised to your needs.
9. Sugary Breakfast Cereals
Some breakfast cereals contain significant amounts of added sugar.
Always check the nutrition label rather than assuming a cereal is healthy because it is marketed as a “breakfast” or “whole-grain” product. Better choices would include:
- Plain oats
- Unsweetened whole-grain cereals
- High-fibre cereals with little or no added sugar
You can add flavour with fresh fruit, nuts, seeds, and cinnamon.
10. Sweetened Yoghurt and Dairy Desserts
Yoghurt can be a nutritious source of protein and calcium, but some flavoured yoghurts and dairy desserts contain substantial amounts of added sugar. Better Choices like plain yoghurt, unsweetened Greek-style yoghurt or low-sugar options. You can also add fresh fruit or a small portion of nuts for additional flavour and nutrients.
11. Sweetened Condiments and Sauces
Sugar can hide in foods that don’t taste particularly sweet.
Check labels on products such as:
- Ketchup
- Barbecue sauce
- Sweet chilli sauce
- Salad dressings
- Some marinades
You don’t necessarily have to eliminate these products. Instead, check serving sizes and choose lower-sugar options when available.
12. Alcohol
Alcohol can affect blood glucose in different ways depending on the type of drink, how much is consumed, whether it is consumed with food, and which diabetes medicines a person takes.
Some alcoholic drinks also contain significant amounts of carbohydrates or added sugar.
If you drink alcohol, discuss what is appropriate for you with your healthcare professional, particularly if you take insulin or medicines that can cause low blood sugar.
FAQs About Diabetes Diet
Yes. Carbohydrates are not eliminated on a diabetes diet, but the type and portion matter. Whole grains and fibre-rich carbohydrates cause a slower, more manageable rise in blood sugar compared to refined carbohydrates.
No. Healthy fats from sources like nuts, seeds, avocado, and olive oil support cardiovascular health and do not significantly raise blood sugar. Saturated and trans fats, common in fried and processed foods, should be limited.
Fibre slows the digestion and absorption of carbohydrates, which reduces how quickly blood sugar rises after eating. This is why whole grains and whole fruit are generally better choices than their refined or juiced counterparts.
Whole fruit, eaten in moderate portions, is generally safe and provides fibre that slows sugar absorption. Fruit juice and dried fruit concentrate sugar should be limited.
Sugary beverages and refined carbohydrates tend to cause the sharpest blood sugar spikes and are often consumed in larger quantities than people realise.
Diabetes Diet: Products to Explore at Purelife Health
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Vitamins and Supplements
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Important: Supplements should not replace prescribed diabetes treatment or a balanced diet. Some supplements may also interact with medicines.
Traditional foods can still have a place in your diet. The goal is to understand how different foods affect you and make informed choices that you can maintain over time.
If you’re living with diabetes and have questions about your medicines, blood glucose monitoring, supplements, or appropriate healthcare products, visit your nearest Purelife Pharmacy and speak with a pharmacist.