Tito, I think probably, supplements for a healthy person would be good. But to someone who has kidney failure (no longer able to filter those supplements like kidney's do) it would probably not be good. As Jeannea said, always consult the Doc.
I on the other hand, have taken supplements. Iam currently taken "Airborne". Which is a large dose of Vit. C and others too. I already got the flu this year (first in years), but I do not want to get that respiratory crap going around, for sure!
I use to take or dabble with alot of that stuff, but have found it to be "quite" expensive. So I just don't do as much!
Any particular one you interested in?
God Bless,
lmunchkin