A small-scale study published in 2017 raised concerns about breakfast skipping (front-end fasting) creating an acute state of muscle glucose intolerance upon refeeding. There is some evidence, based on natural daily cycles of insulin sensitivity, that it is better to skip dinner or start a prolonged overnight fast early in the evening as opposed to skipping breakfast or fasting until late afternoon. However, acute fasting studies that look at the impacts of 24 to 48-hour fasts on individuals who may not be accustomed to fasting periods of this duration are not necessarily indicative of what would happen for individuals who practice fasting on a regular basis, Dr. Krista Varady says. After a month of alternate day fasting, research participants in intermittent fasting studies overwhelmingly experience reductions in glucose levels and insulin resistance, based on cellular adaptations to the stress of fasting.
Articles in this section
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- Are there any supplements I can take to improve the efficacy of my fast?
- Can fasting negatively impact my bone density?
- Can I have a cheat day?
- Does Intermittent Fasting promote longevity?
- How long can I expect to wait before I experience benefits from Intermittent Fasting?
- How long does it take to get into ketosis?
- How long is it safe to fast for?
- Is Intermittent Fasting safe for me if I'm undergoing cancer treatment?
- Is Intermittent Fasting safe for me?