I have been taking these for a while and I do not notice any changes. These supplements are supposed to give you energy. Trust me; there isn't a better test subject than me. I go to school 8 hours a day, almost every day, juggle many online jobs, homework, and by the end of the day I am exhausted. Not to mention sometimes I have class at 9 pm. Since I have been taking these, I have been just as tired as before. I know these have caffeine in them, and I am hoping this wasn't the main ingredient. If so, buying these were pointless, because there is a little thing called coffee that gets the job done. You are supposed to take these once a day. You get 30 tablets in the bottle. Maybe if you are the type of person who is not as busy as I am, and need a little, teeny weenie boost of energy, then this might work well for you. I just feel there are so many other products and foods that will give you the energy benefits. I took them because I never have time to eat healthy, but these just aren't worth it. I don't think they can hurt, but they can't help either.
These were only a dollar, so no harm done to the pockets. I won't keep buying these however. I will just continue to pass out at random times due to lack of sleep.