How can you lose belly fat? Your reasons for wanting to lose belly fat may be cosmetic, this isn’t the main reason you should lose it. Your increasing belly is caused by you accumulating fat in your abdomen. This is actually quite unhealthy – more so when there is lots of fat in between your organs – known as visceral fat. It can lead to heart disease, Type II diabetes and some types of cancer. You may have tried using various diets and exercises to try and get rid of your belly fat – but failed each time. While you may think that you lack will power, that may not be the cause.