Depending on the type of “fasting” diet, you focus all your weight loss efforts into sticking to the severe restriction for either two days a week (as in the 5:2 diet) or every second day (for three to four days days a week), as in alternate-day fasting. Another variation is the 16-hour overnight fast where eating is restricted every day to an eight-hour window, such as 11am to 7pm. Across all types of intermittent energy restrictions diets, we don’t know the longer-term benefits or harms.
Another study on 11 participants (7 women and 4 men), showed that resting energy expenditure actually increased after 3 days of fasting.  This is attributed to the increase in adrenaline that accompanies fasting (3). In response to lower blood glucose levels, adrenaline is released to mobilize glucose from the liver and eventually fat cells. This also gives people a boost of energy and mental focus. It’s for this nootropic effect that many execs in Silicon Valley have been joining the fasting bandwagon as well (4). Therefore, it appears that alternate day fasting could be a powerful and safe tool to achieve weight loss and mental focus, without decreasing one’s metabolic rate significantly.
Fasting for a day or two is not dangerous, but it can harm the people suffering from chronic diseases. It also harms children and pregnant women. There are also medical fasts that are supervised by physicians. These fasts are perfectly safe for everyone. The regime for fasting also varies, but the basic fast usually allows only fresh juice, any laxative concoction or water. There are also some fasting regimes that include the consumption of few solid foods that provide few or low calories.
© 2018 Condé Nast. All rights reserved. Use of and/or registration on any portion of this site constitutes acceptance of our User Agreement (updated 5/25/18) and  Privacy Policy and Cookie Statement  (updated 5/25/18). SELF may earn a portion of sales from products that are purchased through our site as part of our Affiliate Partnerships with retailers. Your California Privacy Rights. SELF does not provide medical advice, diagnosis, or treatment. Any information published on this website or by this brand is not intended as a substitute for medical advice, and you should not take any action before consulting with a healthcare professional.   The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Condé Nast. Ad Choices 
Oolong, a Chinese name for “black dragon,” is a light, floral tea that, like green tea, is also packed with catechins, which help to promote weight loss by boosting your body’s ability to metabolise lipids (fat). A study in the Chinese Journal of Integrative Medicine found that participants who regularly sipped oolong tea lost six pounds over the course of the six-week time period. That’s a pound a week! Shed more belly flab—rapidly—with one of the 4 Teas That Melt Fat!
Everyone’s water needs are different, but the Mayo Clinic recommends that most people aim to drink eight eight-ounce glasses of fluid a day. “That’s a good jumping off point, but a lot of people do better with more,” Cording says. That doesn’t mean you should guzzle gallons of water a day, but having an extra glass or two could make a big difference.
There are some downsides, however. As she explains, "By day two you may as well have all your calls forwarded to the toilet because you will be spending a lot of time in the bathroom. The first time I did the cleanse, I was out with my kids at the mall when all of a sudden I needed a bathroom, stat! It was a nightmare, trying to pack everyone up and find the restroom. I learned the mall is not the place you want to be when your body starts trying to eliminate toxins."
×