Most of the diet pills work by speeding up your body metabolism. When you body metabolism rate is increased, the fat burning process is accelerated. This means, faster fat burning and faster weight loss. Thus almost all diet pills aim at increasing your body metabolism to reduce your weight.
There are also some other diet pills that suppress your appetite. These are known as appetite suppressants and can easily reduce your food cravings. A good appetite suppressant can help you reduce your average calorie intake. This makes the weight loss process more effective and hence leads to faster weight loss.
There is another type of weight loss supplements that can block fatty and oily food from being digested. These are call fat binders. I have seen some very effective fat binders in the market and I will be posted a complete comparison chart soon. So, watch out for that.
There are few more types but I will keep the rest for a bigger discussion. But if you want to known anything about any of the diet supplements, please feel free to leave your comments below.