The most popular brain power supplements in the USA are brain-boosting herbal supplements. It has nothing to do with brain-enhancing supplements. Some people want to look like a top athlete, but don't have enough brain power to achieve this. If you're having trouble with this, you are not getting enough brain power and you should not be using the supplements you are using. The top athletes in the world have more brain power than they could ever have with an illegal steroid habit. Many people who try to use brain-boosting supplements don't realize what a lot of these are actually made of and aren't doing what they are supposed to do to boost their brain power. Many of these are brain-eating bacteria, that are not harmful, and are used to keep you healthy. Many people who claim to be "tweaking up" their minds are actually making their minds worse, not better. Brain-eating bacteria are not a health concern, and are actually a good way to use brain power. Some supplements actually increase the amount of brain power you have and increase your performance and your performance increases as you use the supplement. You can take supplements and use them as needed.