Intermittent fasting is not a currently recommended treatment for those post-bariatric surgery. Typical fasting limits the eating window to 6, 8, or 10 hours. This will limit the hours that an individual has to obtain all micro and macronutrients throughout the day, which may be challenging given the smaller portion sizes after bariatric surgery. Micro and macronutrient deficiencies pose health risks, such as loss of lean muscle, poor healing, increased risk for fractures, neurological damage, and more. In addition, fasting may make it challenging to meet the exercise recommendations of at least 150 minutes of cardio and 2 days per week of resistance training for Americans.
For optimal health, the recommended pattern of eating includes eating at regular times that are consistent on a daily basis. This may look like breakfast within an hour of waking, lunch, dinner, and a couple healthy snacks if needed. It is recommended to consume 45-65% carbohydrates, 20-35% fat, and 10-35% protein, depending on specific recommendations from your healthcare team. Fasting may be a health risk for individuals who are pregnant, breastfeeding, have diabetes, or eating disorders. It is recommended to discuss this practice of fasting with your healthcare provider, especially if you are taking medications, which may need to be adjusted. Also, intermittent fasting may leave you feeling tired and may affect emotional well being. Eating within an hour of waking and then planning regular meals and snacks every 3-4 hours throughout the day gives you the fuel you need to feel good and think clearly. Skipping meals and going for long periods of more than 5 hours between meals and snacks may promote eating too much and too quickly at the next meal time.
While there are many diets and ways of eating advertised, consult with a registered dietitian to help create a nutrition plan that is specific to you and your health goals.
