As a matter of fact, some vitimins can be quite toxic when taken in high doses or even in doses not much higher than the RDA.
And, it has come to light not long ago that too much Vitamin A was not good at all, and yet most multi-vitamins continued to contain the full 100% RDA of Vitimin A (even though most people get more than enough from the Average American diet). Only recently have you seen multi-vitimins reducing the amount of vitimin A BELOW the RDA.
The problem right wingers have with left wingers (and our TV/Radio programs which include strictly fact based programs), is that the left uses fact, science, logic, reason, rationality, research, and investigation in our reporting and decision making. These things are the antithesis of what right wing philosophy is all about. That's why when NPR reports unbiased unvarnished FACT, the right wing flips out about LEFT WING bias, because NPR won't include the right wing spin, bias, and lies right wingers like to use in places like Faux News to osbcure the truth (which typically makes them look VERY bad).
NOW, could you imagine a RIGHT WING doctor?
"These leeches should do nicely. And have this snake bite you once a day. Oh and prayer. Do NOT forget lots and lots of prayer!! ... OH! And you might want to try this new drug from the pharmeceutical company I'm invested heavily in, which had previously been banned by the FDA before the Bush Administration FINALLY put an end to THAT useless government agency. Thank you, stay healthy, AND don't forget to eat the new RDA of 20 oz. of hormone enhanced BEEF. That will be $1500 for the office visit. Oh you can't pay? So sorry, we'll have to take that extra kidney you have just sitting around in your gut, we have a quite wealthy patron who is in dire need of it".