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5 Things that Break Your Fast During Intermittent Fasting that Seem Safe


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Intermittent fasting, particularly the popular 16/8 fasting method, has garnered widespread acclaim for its benefits in health and fitness. However, it's crucial to recognize that not all foods and drinks are created equal when it comes to maintaining the integrity of your fast. In this article, we'll uncover five seemingly safe options that can inadvertently break your fast and disrupt the intended benefits of your chosen fasting time.


1. Fruit Juice and Sugary Drinks

While fruit juice may seem like a healthy choice, it can pack a significant amount of natural sugars. Even in small quantities, these sugars can lead to a spike in insulin levels, breaking the fasted state. Opt for water, black coffee, or herbal tea to stay properly hydrated without compromising your fast.


2. Protein Shakes

Protein shakes are commonly associated with post-workout recovery, but they can also interfere with the fasting process. Most protein shakes, especially those with added sugars or carbohydrates, can lead to an insulin response. If you're using protein shakes as part of your fitness routine, consider consuming them during your eating window.


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Closeup of a man's hand opening a red can of soda on a white background a red can of soda opens

3. Diet Soda and Artificial Sweeteners

While diet soda may be low in calories, it often contains artificial sweeteners like aspartame or sucralose. Research suggests that these sweeteners can stimulate insulin production, potentially breaking your fast. It's best to steer clear of artificially sweetened beverages during fasting periods.


4. Coffee with Milk

Plain black coffee, without any added sugars, creamers, or additives, is generally considered safe during a fast. It contains very few calories (about 2 calories per 8-ounce cup) and is unlikely to significantly affect insulin levels or disrupt the fasting state. Low-Fat or Skim Milk are lower in calories compared to whole milk, but they still contain significant amounts of protein and carbohydrates. As such, they have the potential to break a fast.


5. Bone Broth

Bone broth has gained popularity for its numerous health benefits, but it's not entirely devoid of calories. It contains small amounts of proteins and nutrients that can trigger an insulin response, potentially breaking your fast. If you're a fan of bone broth, consider enjoying it during your eating window to maximize its benefits.


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Safeguarding Your Fasting Window


To maintain the integrity of your fast during 16/8 fasting or any chosen fasting time, it's essential to be mindful of the choices you make. Prioritize water, black coffee, and herbal tea as your primary beverages during fasting periods. When in doubt, consult with a healthcare professional or a registered dietitian who can provide personalized guidance based on your specific health and fitness goals.


Intermittent fasting can be a powerful tool in your health and fitness journey, but it's vital to be aware of the potential pitfalls. By avoiding these seemingly safe foods and drinks, you can safeguard the benefits of your chosen fasting time. Remember, every individual's dietary needs and responses are unique, so it's crucial to tailor your fasting approach to your own body's signals. With knowledge and mindfulness, you can unlock the full potential of intermittent fasting for your overall well-being.

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