no one should be taking any supplements or vitamins without the guidance of a professional. (internet does not count! go to a holistic doctor!) too much vitamin C can be dangerous, as with all vitamins or supplements. and yes, your body can only absorb so much and everyone's different. wouldn't wanna waste money on something that my body can't use to its full extent
I'm not going to agree with this as a blanket statement. Something like taking a multivitamin replaces many of the essential vitamins/supplements normally gained through a decent diet. Some individuals don't eat proper diets, therefore supplement themselves.
However, when someone has a serious unknown illness, it would be best if they didn't blindly take vitamins/supplements that could potentially cause adverse effects.
I'm not minimizing the risks associated with blindly taking high quantities of vitamins and supplements, but holistic doctors aren't the holy grail either. They're fairly opinionated in their direction for vitamin/supplement usage and dosage, therefore you'll most likely not get the same answer from two different individuals.