Metabolic Makeover: Intermittent Fasting or Caloric Restriction - Which One's for You

intermittent fasting, alternating fasting, calorie restriction

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Are you ready to start your weight loss journey and become the healthiest version of yourself? You might have heard about your friend's success with intermittent fasting, but you're also curious about calorie restriction. Unfortunately, with all this buzz, knowing where to start is hard! 

Tell me, what are intermittent fasting and caloric restriction?

Intermittent fasting is an eating pattern that cycles between periods of fasting and eating. It focuses on when you eat rather than what you eat. There are various methods, such as the 16/8 method (fasting for 16 hours and eating during an 8-hour window), the alternate-fasting approach entails fasting every other day, and the 5:2 pattern (generally eating for five days and restricting calories for two non-consecutive days). Fasting has been around since ancient times, integrated into many religions. 

Caloric restriction, on the other hand, involves reducing your daily calorie intake without depriving your body of essential nutrients. It's about consuming fewer calories while maintaining a balanced diet.

 So what is so magical about intermittent fasting or a calorie-restricted diet? Do they bestow benefits on our metabolic health?

Research has revealed that intermittent fasting or a calorie-restricted diet can have numerous health benefits, such as:

  • Improved insulin sensitivity: Fasting can help reduce insulin resistance, lowering the risk of type 2 diabetes.

  • Enhanced heart health: Intermittent fasting may reduce inflammation, blood pressure, and cholesterol levels, all of which contribute to a healthier heart.

  • Weight loss: By limiting your eating window or calorie intake, intermittent fasting can lead to weight loss and improved body composition.

  • Brain health: Studies suggest fasting boosts brain function and protects against neurodegenerative diseases like Alzheimer's.

  • Cellular repair: Fasting activates autophagy, a cellular cleanup process that removes damaged cells and improves overall cellular function.

  • Longer, healthier life: Some research has shown that eating fewer calories might help people live longer and age more healthily. In one study, people who ate fewer calories had fewer signs of aging; the caveat was that these individuals were normal-weight.

Alright, that was insightful information. But how can I choose which approach is best for my metabolic health and weight loss goals?

Choosing between intermittent fasting and caloric restriction depends on personal preferences, lifestyle, and specific health needs. Take time to evaluate the following factors before you jump on either train of intermittent fasting or calorie restriction. 

  • Flexibility: Intermittent fasting may be more appealing to those who prefer not to count calories or limit food choices daily. Caloric restriction may be better for those who prefer a more structured eating plan, have obligations of work (work hours), and have an active social life with friends and family (celebrations and dinner plans)

  • Sustainability: Think about which method you can realistically maintain over the long term. Consistency is vital to successful weight loss and metabolic health improvements. 

  • Medical conditions: Consult with a healthcare professional to determine if either method is appropriate for your specific health situation, for example, if you have diabetes or have been diagnosed with an eating disorder. 

Intermittent fasting and calorie restriction have all the advantages; is that correct? No drawbacks to both methods?

While both methods offer numerous health benefits but have potential risks and drawbacks, intermittent fasting may cause hunger, irritability, or fatigue during fasting periods. In addition, it may not be suitable for individuals with certain medical conditions, such as diabetes [read here] or eating disorders.

Caloric restriction, if not done correctly, can lead to nutrient deficiencies or an unhealthy relationship with food. In extreme cases, it may even result in disordered eating patterns. Moreover, maintaining a consistent caloric deficit might be challenging for some people, leading to fluctuations in weight and adherence.

But I have done intermittent fasting/ calorie restriction for the longest, and now I have plateaued with my weight loss journey; why?

You may encounter the dreaded weight loss plateau – a period where your weight loss progress seems to stall. Plateau during the weight loss journey is a common challenge with intermittent fasting and caloric restriction. Plateaus can be caused by muscle gain, water retention, or a decrease in metabolism as your body adapts to a lower caloric intake [read here]. To overcome this pesky plateau, consider adjusting your fasting protocol, increasing physical activity, or seeking guidance from a healthcare professional. 

In conclusion, intermittent fasting and caloric restriction can lead to improved metabolic health and weight loss. However, the most effective approach for you will depend on your personal preferences, lifestyle, and health needs. Remember, a balanced diet, regular physical activity, and a touch of patience are essential to any successful health and weight loss plan. As with any dietary approach, consulting with a healthcare professional before starting is necessary. 

Dr. Gopi Vora

Board Certified by the American Osteopathic Board of Internal Medicine and Diplomate of the American Board of Obesity Medicine.

She specializes in Obesity Medicine in adults.

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