Categories >> Treatments >> Fasting
Fasting is a practice of restricting food or drink for a period of time. It can be used for religious purposes, medical testing, weight loss, or is increasingly seen as valuable for wellness as well. [1, 2]
How it works [3]
Energy sources
During fasting, the body breaks down fat stores into fatty acids and glycerin to provide energy. The liver then converts these fatty acids into ketone bodies, which are the main energy source for many tissues. [3]
Hormone levels
Fasting increases levels of human growth hormone (HGH) and decreases levels of insulin. [4]
Cellular repair
Fasting initiates cellular repair processes, including autophagy, which is when cells remove old and dysfunctional proteins. [4]
Gene expression
Fasting can change the function of genes related to longevity and disease prevention. [4]
Benefits [5]
• Weight loss: Fasting can help with weight loss. [5]
• Blood sugar control: Fasting can reduce insulin resistance and lower blood sugar levels. [6]
• Protection against disease: Fasting may protect against medical conditions like cancer and neurodegenerative disorders. [5]
• Improved brain function: Fasting may improve brain function. [5]
History [5]
• Fasting has been practiced for centuries and is central to many cultures and religions. [5]
• Ancient fasting practices emerged around 1,500 BC with the Vedic, Hindu, and Jainism religions. [7]
Safety [8]
• There is not enough evidence to recommend fasting as a public health regimen.
• Scientists still have much to learn about how fasting affects people who are not overweight, including older adults.
[1] https://www.webmd.com/diet/ss/slideshow-ketogenic-diet
[2] https://www.steadfastnutrition.in/blogs/news/what-to-eat-on-the-ketogenic-diet-the-complete-keto-food-list
[3] https://www.delish.com/food/a29714370/best-nuts-for-keto-diet/
[4] https://www.healthline.com/nutrition/ketogenic-diet-foods
[5] https://www.eatingwell.com/article/291245/complete-keto-diet-food-list-what-you-can-and-cannot-eat-if-youre-on-a-ketogenic-diet/
[6] https://www.everydayhealth.com/ketogenic-diet/cheeses-you-can-eat-on-the-keto-diet-and-you-cant/
[7] https://www.everydayhealth.com/ketogenic-diet/is-yogurt-keto/
[8] https://www.uchicagomedicine.org/forefront/health-and-wellness-articles/ketogenic-diet-what-are-the-risks