Have been using this product for two years. usually buy those 180 jells as my wife also use it & i travel a lot. during which I have not had the flu or any bad colds. it helps my immune system and i take one capsule a day. there are low priced capsules available but i am a bit skeptical about the quality. i made lots of enquiries before i made up my mind. give it a try if you are low on immunity