Common Myths About Blood Glucose (BG) Levels, Debunked

30 Aug 2025

Common Myths About Blood Glucose (BG) Levels, Debunked Managing blood glucose (BG) levels is crucial for individuals with diabetes and also important ...

Common Myths About Blood Glucose (BG) Levels, Debunked

Managing blood glucose (BG) levels is crucial for individuals with diabetes and also important for those looking to maintain overall health. However, the topic is often riddled with misinformation, leading to confusion and potentially harmful practices. In this article, we'll debunk some of the most common myths surrounding blood glucose levels, providing clarity and accurate information to empower better health management.

Why Understanding Blood Glucose Levels Matters

Before diving into the myths, let’s quickly recap why understanding blood glucose levels is so vital. Maintaining stable blood sugar helps:

Related reading: Diet Changes To Help Lower Your A1C Blood Sugar Level

Related reading: How To Achieve Better Control Of Blood Glucose Levels Naturally

  • Prevent or delay diabetes-related complications: These include heart disease, kidney disease, nerve damage, and vision problems.
  • Optimize energy levels: Avoiding significant BG swings helps maintain consistent energy throughout the day.
  • Support weight management: Stable blood sugar aids in appetite control and can prevent excessive calorie intake.
  • Improve mood and cognitive function: BG fluctuations can affect mood and concentration.

| Benefit | Explanation | | ------------------------------- | ---------------------------------------------------------------------------- | | Prevents Long-Term Complications | Reduces the risk of heart disease, kidney damage, neuropathy, and retinopathy. | | Stabilizes Energy | Prevents energy crashes and fatigue associated with high and low blood sugar. | | Aids Weight Management | Curbs cravings and prevents overeating by maintaining consistent sugar levels. |

Now, let's tackle the misconceptions.

Myth #1: You Only Need to Worry About Blood Glucose Levels if You Have Diabetes

The Truth: While managing blood sugar is especially crucial for people with diabetes, maintaining healthy blood glucose levels is important for everyone. Regularly high blood sugar, even in the pre-diabetes range, can contribute to weight gain, insulin resistance, inflammation, and an increased risk of developing type 2 diabetes in the future.

Many individuals without a diabetes diagnosis can experience reactive hypoglycemia (low blood sugar) after consuming sugary foods, leading to unpleasant symptoms like shakiness, sweating, and confusion. Being mindful of your dietary choices and how they impact your blood sugar can benefit everyone.

For example, consider someone who frequently consumes sugary sodas and processed snacks. Even if they don't have diabetes, their body is constantly working to process these large sugar spikes, which can lead to insulin resistance over time. Making gradual changes, such as swapping sugary drinks for water and opting for whole, unprocessed foods, can have a positive impact on their blood glucose levels and overall health.

Myth #2: All Carbs are Bad for Blood Sugar

The Truth: It’s not all carbohydrates that are the problem, but rather the type and quantity. Simple carbohydrates, such as refined sugars and processed foods, are rapidly digested and can cause quick spikes in blood sugar. Complex carbohydrates, such as whole grains, legumes, and vegetables, are digested more slowly, providing a more gradual release of glucose into the bloodstream.

The key is to focus on incorporating complex carbohydrates in moderation, paying attention to portion sizes, and pairing them with protein and healthy fats, which can further slow down glucose absorption. For example:

  • Instead of white bread, opt for whole-wheat or sprouted-grain bread.
  • Replace sugary cereals with oatmeal or quinoa porridge.
  • Choose sweet potatoes over white potatoes.

Here's a simple comparison:

| Carbohydrate Source | Impact on Blood Glucose | Additional Nutrients | | -------------------- | ----------------------- | ---------------------- | | White Bread | Rapid Spike | Few | | Whole-Wheat Bread | Gradual Increase | Fiber, Vitamins | | Sugary Cereal | Rapid Spike | Few | | Oatmeal | Gradual Increase | Fiber, Minerals |

Myth #3: Fruit is Unhealthy Because it Contains Sugar

The Truth: Fruits contain natural sugars (fructose), but they also provide essential vitamins, minerals, fiber, and antioxidants. The fiber in fruit helps to slow down the absorption of sugar, minimizing its impact on blood glucose. The benefits of eating whole fruits generally outweigh the concerns about their sugar content, especially when consumed in moderation.

Of course, some fruits contain more sugar than others. Berries, for instance, tend to be lower in sugar and higher in fiber compared to tropical fruits like mangoes or bananas. Dried fruits have a higher concentration of sugar than fresh fruits, so portion control is especially important.

Here's a quick guide to fruits and their relative sugar content:

| Fruit | Sugar Content (per serving) | Fiber Content (per serving) | Additional Benefits | | ------------ | --------------------------- | --------------------------- | -------------------------------------- | | Berries | Low | High | Antioxidants, Vitamin C | | Apple | Moderate | Moderate | Vitamin C, Potassium | | Banana | High | Moderate | Potassium, Vitamin B6 | | Mango | High | Low | Vitamin A, Vitamin C |

Myth #4: If My Blood Sugar is Normal, I Don’t Need to Worry About My Diet or Exercise

The Truth: Maintaining healthy blood glucose levels through diet and exercise is an ongoing process, even if your current levels are within the normal range. Consistently poor dietary choices and a sedentary lifestyle can lead to insulin resistance and, eventually, type 2 diabetes. Regular physical activity helps improve insulin sensitivity and regulate blood sugar, while a balanced diet provides the necessary nutrients and helps prevent blood sugar spikes.

Think of it as building a strong foundation for long-term health. You can't just build the foundation once and expect it to last forever. Regular maintenance through consistent healthy habits is key.

Myth #5: Exercise Always Lowers Blood Sugar

The Truth: While exercise generally helps improve insulin sensitivity and lower blood glucose over time, the immediate effect of exercise on blood sugar can vary depending on the type, intensity, and duration of the activity, as well as individual factors such as insulin levels and recent food intake.

  • Aerobic Exercise (e.g., running, swimming): Tends to lower blood sugar during and after the activity.
  • Strength Training (e.g., weightlifting): Can sometimes raise blood sugar temporarily due to the release of stress hormones, but it improves insulin sensitivity in the long run.

People with diabetes need to monitor their blood glucose before, during, and after exercise to understand how their body responds to different types of physical activity and adjust their insulin dosage or food intake accordingly.

Related reading: Cgm For Beginners Is A Continuous Glucose Monitor Worth It

Myth #6: Natural Sweeteners Don't Affect Blood Sugar

The Truth: While natural sweeteners like honey, maple syrup, and agave nectar are often marketed as healthier alternatives to refined sugar, they still contain glucose and fructose and can raise blood glucose levels. The impact might be slightly different than that of white sugar, but these sweeteners should still be used in moderation, especially by individuals with diabetes or insulin resistance.

Some natural sweeteners, like stevia and erythritol, have minimal impact on blood sugar and are often used in sugar-free products. However, it's important to check the ingredient list and be mindful of potential additives that could affect blood glucose levels.

| Sweetener | Impact on Blood Glucose | Calories | Notes | | ------------------ | ----------------------- | ----------- | ------------------------------------------------------------ | | White Sugar | High | High | Rapidly absorbed | | Honey | Moderate | High | Contains some antioxidants | | Maple Syrup | Moderate | High | Contains some minerals | | Stevia | Minimal | Negligible | Natural, may have a slightly bitter aftertaste | | Erythritol | Minimal | Negligible | Sugar alcohol, well-tolerated by most people |

Myth #7: Stress Doesn't Affect Blood Glucose

The Truth: Stress can significantly impact blood glucose levels. When stressed, the body releases stress hormones such as cortisol and adrenaline, which can increase blood sugar. Chronic stress can lead to insulin resistance and make it more difficult to manage blood glucose effectively.

Stress management techniques, such as meditation, yoga, deep breathing exercises, and spending time in nature, can help regulate stress hormones and promote stable blood glucose levels.

Myth #8: More Insulin is Always the Answer for High Blood Sugar

The Truth: While insulin is essential for managing blood glucose in individuals with diabetes, simply taking more insulin without addressing the underlying cause of high blood sugar can be counterproductive and even dangerous. High blood sugar could be caused by:

  • Dietary Choices: Eating too many carbohydrates, especially refined ones.
  • Lack of Physical Activity: Insufficient exercise reduces insulin sensitivity.
  • Stress: Hormonal changes can raise blood sugar.
  • Illness: Infections can increase blood sugar.
  • Medications: Some medications can affect blood sugar levels.

Working with a healthcare professional to identify the root cause of high blood sugar and develop a comprehensive management plan that includes dietary adjustments, exercise, stress management, and medication adjustments (if needed) is the safest and most effective approach.

Myth #9: Once You Have Diabetes, You Can’t Reverse It

The Truth: While type 1 diabetes is an autoimmune condition that cannot be reversed, type 2 diabetes can often be put into remission or even reversed through significant lifestyle changes, such as weight loss, dietary modifications, and increased physical activity. Remission means that blood glucose levels are within the normal range without the need for medication.

Reversal requires sustained effort and commitment but is achievable for many people with type 2 diabetes. Early diagnosis and intervention increase the likelihood of success. Consulting with a healthcare provider or registered dietitian is crucial for developing a personalized plan.

Conclusion

Understanding the truth about blood glucose levels is essential for maintaining good health and preventing diabetes-related complications. By debunking these common myths and providing accurate information, we hope to empower you to make informed decisions about your diet, exercise, and overall health management. Always consult with a healthcare professional or registered dietitian for personalized advice and guidance. Remember, knowledge is power when it comes to managing your blood sugar and optimizing your well-being.