Why do people think vitamins, supplements, etc. are dangerous?

they just want to discredit the competition and buy them out to have all the profits for themselves. nobody pays attention to them because we are all waking up to all the dangers, deaths and conspiracies of big pharma and the medical industry. thats why there are so many trolls on here trashing alt med - they are paid to do this! how else would doctors and nurses be able to answer questions ALL DAY unless it was their job? no nurse or doctor i know has all that spare time!