5 Common Diabetes Nutrition Myths, Debunked
Diabetes is one of those health topics surrounded by a lot of nutrition advice, and not all of it is accurate. I hear misconceptions about sugar, carbohydrates, fat, and what people should or shouldn't eat. Some of these ideas have been around for years, and others are repeated so often online that they start to sound like facts.
FAQs About Diabetes and Nutrition
Does eating sugar cause type 2 diabetes?
No. Eating sugar does not directly cause type 2 diabetes. Genetics, insulin resistance, lifestyle, and other factors all contribute to risk. Regularly consuming sugar-sweetened beverages can increase risk, but sugar alone doesn't cause it.
Can people with diabetes eat fruit?
Absolutely! Whole fruits provide fiber, vitamins, minerals, and other beneficial nutrients. Fruit contains natural sugars and carbohydrates, so portion sizes and individual blood glucose responses may be worth considering, but you don't need to avoid fruit.
Do people with diabetes need to avoid bread?
No. Bread can be part of a balanced eating pattern. Whole-grain breads often provide more fiber and nutrients than refined options. The amount of carbohydrate and individual blood glucose response matter.
Is a low-carb diet best for diabetes?
Not necessarily. Lower-carbohydrate eating can help some people manage blood glucose, but it isn't the only effective approach. The best eating pattern supports individual health needs, preferences, and glucose goals.
Can type 2 diabetes go into remission?
Yes. Some people with type 2 diabetes can achieve remission, meaning blood glucose levels return below the diabetes range without glucose-lowering medication for a specified period. However, remission is not a cure, and continued monitoring and medical care are important.
As a Registered Dietitian Nutritionist, I think it's important to separate what we know from what is assumed. Nutrition plays an important role in managing diabetes and reducing the risk of type 2 diabetes, but that doesn't mean there is one specific food to avoid or one eating plan everyone needs to follow.
So here are five common myths and what the evidence actually says.
Myth #1: Eating Sugar Causes Diabetes
This is probably one of the most common misconceptions about diabetes. The idea that eating sugar causes diabetes is an oversimplification of a much more complicated condition.
First, it's important to distinguish between type 1 and type 2 diabetes. Type 1 diabetes is an autoimmune condition in which the immune system attacks the pancreas's insulin-producing cells. It is not caused by eating sugar, consuming too many carbohydrates, or lifestyle choices. Genetics and environmental factors can contribute to its development.
Type 2 diabetes develops differently. It involves insulin resistance and, over time, the body's inability to produce enough insulin to keep blood glucose within a healthy range. Genetics, family history, age, physical activity, body composition, and other health and environmental factors all contribute to risk. Food choices are part of the picture, but they aren't the whole story.
That doesn't mean added sugar is irrelevant. Regularly drinking sugar-sweetened beverages, for example, can contribute to excess calorie intake and increased risk of type 2 diabetes. The American Diabetes Association recommends replacing sugar-sweetened beverages with water or low-calorie alternatives and limiting foods with added sugars.
The takeaway? You don't need to blame a cookie, dessert, or spoonful of sugar for diabetes. Look at overall eating patterns and habits rather than singling out one food.
Myth #2: People with Diabetes Can't Eat Carbohydrates
I wish this myth would go away. Carbohydrates are often treated as something people with diabetes need to avoid, but that simply isn't true.
Carbohydrates affect blood glucose because they break down into glucose during digestion. But that doesn't make them unhealthy or off-limits. Fruits, vegetables, beans, lentils, whole grains, and dairy foods all contain carbohydrates, along with nutrients that contribute to a balanced eating pattern.
The amount and type of carbohydrate matter, as does the overall meal. Higher-fiber, less-processed foods can be useful choices because fiber slows digestion and can help moderate the rise in blood glucose. Examples include whole grains, beans, vegetables, and whole fruits.
It can also help to consider what else is included in a meal. Eating carbohydrates alongside protein, fat, and fiber can change how quickly a meal is digested and how glucose levels respond. However, no single combination works the same way for everyone.
For someone using insulin or certain diabetes medications, carbohydrate amounts and timing may need to be coordinated with medication to help manage blood glucose and reduce the risk of low blood sugar.
You don't need to eliminate carbohydrates. The goal is to find an amount and pattern that works with individual needs, preferences, medications, and blood glucose goals.
Myth #3: A Low-Carb Diet Is the Only Way to Manage Diabetes
Lower-carbohydrate eating patterns can help some people manage blood glucose. For some, reducing carbohydrate intake makes it easier to meet their glucose goals. But that doesn't mean a low-carb diet is the only effective approach.
No single eating pattern works best for everyone with diabetes. A Mediterranean-style eating pattern, a plant-forward approach, a lower-carbohydrate plan, or another balanced approach may be appropriate depending on the person's health, preferences, and treatment plan.
The American Diabetes Association emphasizes individualized nutrition care rather than prescribing one specific distribution of carbohydrates, protein, and fat for everyone.
I also think it's important to consider whether an eating plan is realistic and sustainable. A very restrictive approach may work for some people, but it may not be practical or enjoyable for others. Food preferences, culture, budget, daily routines, and medication use all matter.
Instead of focusing on a particular diet label, consider the overall quality of the eating pattern. Include a variety of vegetables, fruits, legumes, whole grains, lean proteins, and sources of unsaturated fat. Adjust carbohydrate intake based on individual needs and guidance from the healthcare team.
Myth #4: All Fats Are Bad for People with Diabetes
Fat has been blamed for a lot over the years, but not all fats affect health the same way.
Unsaturated fats, found in foods such as olive oil, avocados, nuts, seeds, and fatty fish, can be part of a heart-healthy eating pattern. These foods provide essential fatty acids and other nutrients. Eating patterns that include foods such as nuts, seeds, and fatty fish are encouraged because of their potential benefits for cardiovascular health and glucose metabolism.
Saturated fat deserves more attention. Foods high in saturated fat include butter, coconut oil, fatty and processed meats, and some full-fat dairy products. The American Diabetes Association recommends limiting foods high in saturated fat to help reduce cardiovascular disease risk.
This matters because people with diabetes have an increased risk of cardiovascular disease. Managing diabetes isn't just about blood glucose. Heart health, blood pressure, cholesterol, and other factors are important, too.
Rather than avoiding all fat, focus on the types of fat you're eating and the overall balance of your food choices.
Myth #5: Diabetes Can Be Cured
This one needs some clarification.
There is currently no cure for type 1 diabetes. People with type 1 diabetes need ongoing insulin treatment and medical care.
Type 2 diabetes is a little different. Some people can achieve what is called diabetes remission, meaning their blood glucose levels return to a non-diabetic range and stay there without glucose-lowering medication for a specified period. Remission can occur following significant weight loss or other interventions, including metabolic surgery.
But remission is not a cure. Blood glucose levels can rise again, and the underlying risk of diabetes and related complications may remain. Continued monitoring and regular healthcare visits are still important.
This is so important to distinguish! Promising a cure can create unrealistic expectations. It can also make people feel that they've failed if they don't achieve remission. Diabetes management isn't a matter of willpower, and outcomes depend on many factors beyond individual food choices.
Focus on effective treatment, appropriate nutrition support, physical activity, medication when needed, and ongoing care.
The Bottom Line: Diabetes Nutrition Is Personal
There's a lot of nutrition advice out there about diabetes, but the basics are often more practical than the headlines suggest.
Sugar doesn't directly cause diabetes. You don't need to eliminate carbohydrates. A low-carb diet isn't the only option. Dietary fat isn't automatically unhealthy. And while type 2 diabetes remission is possible for some people, it isn't the same as a cure.
Nutrition can play an important role in diabetes prevention and management, but no single approach works for everyone.
If you have diabetes or are at risk of developing it, working with a Registered Dietitian Nutritionist experienced in diabetes care can help you develop an eating plan that fits your health needs, food preferences, and lifestyle.
You don't need to follow every nutrition trend or avoid entire food groups to make meaningful changes. Reliable information, individualized care, and realistic habits are a much better place to start.
References and Further Reading:
The Glycemic Index: Helpful Nutrition Tool or Just Another Number?
Low-Carb and No-Carb Diets: What They Get Right and What They Miss
How to Build a Balanced Plate When Carbohydrates Are Involved
American Diabetes Association. (2026). Standards of Care in Diabetes: Facilitating Positive Health Behaviors and Well-being to Improve Health Outcomes
Centers for Disease Control and Prevention. (2024). Diabetes Risk Factors
National Institute of Diabetes and Digestive and Kidney Diseases. Type 1 Diabetes
National Institute of Diabetes and Digestive and Kidney Diseases. Risk Factors for Type 2 Diabetes
Riddle, M. C., et al. (2021). Consensus Report: Definition and Interpretation of Remission in Type 2 Diabetes. Diabetes Care, 44(10), 2438–2444. PMID: 34462270
Important Note: As of Fall 2026, the .gov links are accurate. However, there is a banner/heading that says NIH Websites Are Changing, so if these links do not work later, try searching by title.
Real World Nutrition Refreshed. As nutrition science and perspectives evolve, older blog posts are occasionally updated and republished. This post was originally written in November 2023 and has been refreshed and expanded here.
