One of the problems with listening to "Scientists and Doctors," is that scientists and doctors have vastly varying opinions on all kinds of things just as the average person does. And scientists follow the herd mentality just as all other people do. What is taken as consensus scientific truth today, may be totally disproven in the future.
Just as an example; one of my heros growing up in the early 70's was Dr. Linus Pauling, a brilliant bio-chemist who won the Nobel Prize for Chemistry. He was a strong proponent for the value of taking Vitamin C and other Vitamin supplements. He was a scientist, a brilliant one as a matter of fact. I have to this day followed his advice and taken Vitamin supplements, I'm 65 and still healthy, knock on wood. So, I think I'll keep following his advice. It's worked so far.