Most detox teas contain caffeine, probably because this stimulant may suppress appetite, trigger your digestive system to let go of waste, and help you shed water weight. A caffeine-induced energy boost may also lead to working out a little longer or harder than usual. However, too much caffeine can also be risky (see above) and interfere with getting enough sleep–and catching too few zzzs may ultimately undo the tea's weight-loss effects. In fact, too little shuteye has been shown to trigger excessive eating and weight gain and even slow metabolism, which can make it easier to gain weight even if you don't eat extra calories. A good rule of thumb, regardless of where your caffeine is coming from, is to nix it at least six hours before bed. And if you're trying to shed pounds, commit to making adequate sleep a top priority.
Traditionally, body fat was thought to be stored passively in cells, waiting to be used for energy by the body. However, research has shown that fat cells are biologically active and function as an endocrine organ by secreting hormones and other molecules. The activity of visceral fat results in an inflammatory state that is strongly linked to metabolic disease, insulin resistance, and an increased risk of death, even in men at normal body weight.
Grapefruit, on the other hand, contains ample vitamin C which is known for its fat-burning properties. According to a study, vitamin C plays a vital role in enzyme function and the low vitamin C levels make it harder to oxidize fat during exercise. The researchers found that an insufficient amount of vitamin C can hinder the burning of belly fat  .
First one’s the Adrenal belly or Adrenal shape, caused by increased levels of cortisol. When going through stressful periods, the production of cortisol increases, and this favours the accumulation of fat around the waist, leading to a saggy abdomen. Both men and women are likely to gain weight around the waist if they are constantly exposed to high levels of stress, and besides the excess belly fat, they are also likely to experience fatigue, back pain, nervousness, poor memory and sleep problems.