Green tea is rich in antioxidants that boost the body's process of cleansing and detoxification. The most potent antioxidant is catechins and one of these is epigallocatechin gallate (EGCG), a substance that boosts metabolism  . Another beneficial compound present in green tea is caffeine, a natural stimulant that has been found to burn fat  .
Dark chocolate is loaded with antioxidants and a nice dose of oleic acid, which is a monounsaturated fat. It also contains stimulants that can have a positive effect on fat burning, including theobromine and caffeine. Dark chocolate reduces the production of the stress hormone cortisol, which causes belly fat to accumulate. Try it for a quick breakfast to keep your appetite tamed for hours.
What makes rooibos tea particularly good for soothing your mind is the unique flavanoid called Aspalathin. Research shows this compound can reduce stress hormones that trigger hunger and fat storage and are linked to hypertension, metabolic syndrome, cardiovascular disease, insulin resistance and type 2 diabetes. On The 7-Day Flat Belly Tea Cleanse, you'll learn how drinking a cup of rooibos at 9pm could help you melt fat faster—and finally get a night of calming, deep sleep.
Detox teas that combine caffeine with diuretics can trigger the loss of water weight. Just two cups of water weighs one pound on a scale, so shedding fluid can make you look and feel lighter–even if you haven't lost an ounce of body fat. Detox teas can also trigger a laxative effect, which causes your body to eliminate waste from your GI tract, another result that can make your stomach flatter, and allow you to feel lighter, even if your lean-to-fat ratio remains exactly the same. If this quick-fix effect gives you the confidence boost and motivation you need to start eating healthier and working out–the real keys to getting healthy and lean–terrific (assuming the teas are even safe to drink–see below). Just remember: If you go back to your former less-than-stellar eating or exercise habits, or stop drinking the tea, you can gain the weight right back just as quick as you dropped it.