lf you are too fat, you may have serious with your health A group of doctors wrote a report about some of the effects of too much fat.one important effect is stress on the heart.If you are fat, your heart has to work harder. This may lead to a heart attack or to other heart problems. Extra fat can also change the amount of sugar in your blood, this can cause serious diseases, such as diabetes. high blood pressure is another possible result of being fat. even cancer can sometimes be a result. More studies are needed about all these problems. But one thing is clear:Extra fat may make your life shorter.