It is really a good idea to check them Java Burn out on the internet before buying any weight loss supplements. You can also check with your pharmacist. But, always try to stick with reputable or the more well-known brands. Believe it or not the internet is a great resource for finding a lot of helpful information and if there has been an issue with the supplements you can be certain someone will have been online and commented on it somewhere. Just put the name of the product you are thinking of buying into Google and see what comes up.