my文章，可否幫我check 下D grammar?... thx

In fact, those slimming drugs contain haw. Haw is a plant. It can help people digest easily. But, if your stomach doesn’t have enough food, it will hurt your tummy. Usually, when a person is keeping fit, she will eat less. In that case, haw will hurt her tummy and makes her ill. Nowadays, there are a lot of people try these slimming product, whereas they didn’t seem right. Some of the users had a stomach-ache very often. They will also have a insomnia or even anorexia. How terrible it is!