I always remember that Linus Pauling used to take something like 3000 mg of Vitamin C a day, convinced it would ward away the common cold. Even really respected scientists can fall into quackery. There’s got to be something baked into our DNA at some level that makes us want to think food is the cure-all for what ails you.
There’s probably an unconscious, almost
instinctual preference for “natural” over “man-made” stuff. Even for trained professionals.
I mean, virtually every doctor I’ve had a discussion with about diet opined about getting our nutrition from natural sources before going into supplemental sources of nutrition. I take D & K, largely because other meds I take cause me deficiencies of those 2 vitamins, and I simply couldn’t eat enough food to make up the deficiencies. (I
did ask.)
And it’s well known that nutritional deficiencies are associated with a lot of preventable afflictions, like certain kinds of blindness, scurvy, anemias and so forth. For some of these, taking supplements is an easy fix.
And in medicine/ healthcare- as in many other facets of life- we know that prevention is almost always cheaper than remedies.
But that means unnecessary megadosing is an easy trap to fall into. If BOB’S eyes got better taking lots of vitamin A (because he doesn’t absorb it well), then if I take extra, I’ll prevent problems with my eyes in the future.
Of course, that ignores the reality that too much of vitamin A can cause things like liver damage.