Yam is just a food and has no weight loss benefits. Yam is a relatively common food. As a food, it can not play the same effect as drugs, so it is not able to achieve the effect of weight loss. And yam is rich in energy and carbohydrates, if often eaten in excess, it is easy to lead to excessive calorie intake, which may lead to fat. During the weight loss period to eat yam must control the amount, do not eat too much, eat other foods also need to control the amount, but also pay attention to diet and nutritional balance, do not eat picky food, you can properly more physical exercise, such as running, jumping rope, swimming, etc., can help to consume the body of excessive calories, conducive to weight loss.