One idea underlying weight loss cleanses is that increasing bowel movements will reduce the calories the body uses, but your body absorbs nearly all the calories you consume before the food reaches your colon. Another theory in favor of weight loss cleanses holds that clearing out toxins -- chemicals from food, water and pollution -- assists the body in losing weight.
There are weight loss teas available that many consumers contest to how well it worked for them. However, this doesn’t make it a magic pill that automatically slims the consumer and makes them lose a large amount of weight overnight. Some blends are meant to drink for 14- or a 28-days. Some people might start to notice a difference in as early as 3 days, where others might need to complete the duration.
A systematic review of 40 studies found that intermittent fasting was effective for weight loss, with a typical loss of 7-11 pounds over 10 weeks.  There was much variability in the studies, ranging in size from 4 to 334 subjects, and followed from 2 to 104 weeks. It is important to note that different study designs and methods of intermittent fasting were used, and participant characteristics differed (lean vs. obese). Half of the studies were controlled trials comparing the fasting group to a comparison group and/or a control group (either continuous calorie restriction or usual lifestyle), with the other half examining an intermittent fasting group alone. A brief summary of their findings:
Also known as branch chain amino acids. BCAAs are three amino acids known as Leucine, Valine and Iso-Leucine. They help prevent muscle breakdown and can be bought as yummy flavoured powders to use in place as sports drinks. Drink them during your workout instead of water as they will help you tone up as you lose that belly and may even help in the formation of abdominal muscle.