Not sure if carb inhibitors work the way they say they do. Had some caps from the Vitamin Shoppe. I never really planned to eat alot of carbs, so I would rarely take them before a meal. But sometimes during a meal I would realize that i had gone a little overboard with the carbs and then I would use them as a mayday--pop open the capsules and pour it in my mouth with a little swish and a big gulp of water. The only thing I truly notice from these is, right after you take them you feel full, but then afterwards it feels like you've swallowed a hollow bubble because you can almost feel the carbs not being digested, and it makes you feel like eating more to get the satiation even though your tummy is still full from the meal. Its one strange feeling, and I must say it didn't result in anything more than extra gas for me, and going to the bathroom more often.