Intermittent fasting has gained popularity as a weight loss and health strategy, especially for people with Type 2 diabetes. Research has shown that it can be effective for weight loss and improving various health indicators. However, the safety and suitability of intermittent fasting vary depending on individual circumstances, especially for those with diabetes.

One of the key risks associated with intermittent fasting is the potential for hypoglycemia, or low blood sugar. People with Type 2 diabetes, especially those taking medications to lower blood sugar, are at an increased risk of hypoglycemia during fasting. It’s important to monitor blood sugar levels closely and collaborate with a healthcare provider to manage this risk. The study suggests that the medications used may be more responsible for hypoglycemia than the fasting itself.

For individuals with Type 2 diabetes who aren’t on blood sugar-lowering medications, the risk of hypoglycemia appears to be lower. However, it is still recommended to consult with a healthcare provider, such as an endocrinologist or nutritionist, to ensure proper monitoring and guidance when attempting intermittent fasting. It’s not a question of whether they should fast but rather how closely they need to be monitored during the process.

Another concern is dehydration. High blood glucose levels can cause dehydration, and people with Type 2 diabetes are already at an elevated risk. Intermittent fasting may increase these risks if individuals consume less fluid during fasting periods. Adequate hydration is crucial, and individuals should ensure they are drinking enough water.

“With dehydration, people with diabetes can have a variety of negative outcomes,” Horne says. Stroke, migraine headaches, and kidney damage as potential problems, especially if a person with diabetes has other health conditions related to these risks. “So, if someone already has a problem with their kidneys—and oftentimes people with diabetes have some kind of kidney issue, if not full-blown kidney disease—dehydration can potentially cause harm,” he explains. While drinking water or other noncaloric liquids while fasting can reduce these risks, people who have Type 2 diabetes along with other chronic diseases—such as heart disease or kidney disease—probably shouldn’t attempt fasting diets. The same goes for older, frail people with diabetes. “Fasting puts stress on the body and organs,” he says. If you’re weak or unwell, going without food is probably a bad idea.

In addition to these risks, intermittent fasting can potentially lead to nutrient deficiencies and inadequate protein intake, particularly in older individuals. Proper nutritional planning is essential to address these concerns.

The safety of intermittent fasting is not well-documented for certain groups, including pregnant or breastfeeding women and young children. These populations have specific nutritional requirements that differ from the general population, and fasting may not be suitable for them. As a result, experts recommend caution and avoiding fasting until more is known about the potential risks and benefits in these groups.

In summary, intermittent fasting can be beneficial for some individuals with Type 2 diabetes, especially for weight management and blood sugar control. However, it should be approached with caution, and consultation with a healthcare provider is crucial, particularly for those on medications. Individualization, monitoring, and proper hydration are essential to ensure the safety and effectiveness of intermittent fasting.


The information contained in this article is for educational and informational purposes only and is not intended as a health advice. We would ask you to consult a qualified professional or medical expert to gain additional knowledge before you choose to consume any product or perform any exercise.

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