One of the best way to do online shopping of any product is by doing three things. Off course before picking a product or service, you do your research. You read about the products, you get to know the products, you read the reviews to make sure that this product is what meets your needs. One think that is important, that is to read reviews from different websites to get a more realistic picture and other costumers experience. Another thing that is very important, is that you read what ingredients the health and weight-loss supplement contains and that it is organic and what is the origin of the ingredients. Same goes with fitness machines etc. Here is a link to a website that provide a best-selling ranking of the most sold fitness products online. It's called topstarreviews. You can off-course also just search in Ebay and Amazon as well.