05/10/2019
There is a growing body of research indicating that fasting, when done correctly, activates powerful cellular adaptation mechanisms which promote longevity and wellbeing, and prevent chronic disease. However, research has also yielded unexpected, conflicting and even concerning results, leaving many health professionals wondering what media information is hype and what form of fasting is best suited to their clients.
‘Fasting does not mean no food intake, it reflects the body’s ability to meet nutrient requirements largely from the body’s energy reserves without endangering health.’
In a recent 2017 randomised clinical trial, researchers set out to determine if alternate day fasting was more effective for weight loss and cardiovascular protection when compared with daily calorie restriction. They unexpectedly found that while both methods were successful for weight loss, alternate-day fasting did not produce superior adherence or results and actually increased LDL cholesterol when compared to a standard low-calorie diet.
In contrast, a 2019 randomised controlled trial on overweight adults who practiced early time-restricted feeding (an eating window from 8am-2pm) had significantly superior results when compared to a normal daily eating schedule (from 8am to 8pm), even when both groups consumed the same amount of calories.
Reviews of the most recent research on fasting, suggest at least 8 key stand-out principles which have been shown to work optimally for longevity, disease prevention and weight loss whilst minimising risks. These key principles include:
• The circadian timing of food is important when fasting
• Eating a healthy diet on both fasting and non-fasting days produces better long-term results
• The benefits of fasting can be mimicked from eating specific food groups
Bio-Practica
Complementary and Natural Medicine
Article references:
• Ravussin, E., Beyl, R. A., Poggiogalle, E., Hsia, D. S., & Peterson, C. M. (2019). Early Time‐Restricted Feeding Reduces Appetite and Increases Fat Oxidation But Does Not Affect Energy Expenditure in Humans. Obesity, 27(8), 1244-1254.
• Trepanowski, J. F., et al. (2017). Effect of alternate-day fasting on weight loss, weight maintenance, and cardioprotection among metabolically healthy obese adults: a randomized clinical trial. JAMA internal medicine, 177(7), 930-938.