If possible. I'm sure it is, but what are the signs of over nourishment or over-supplement of vitamins/calcium? I have heard of this before, but not enough to know as much as I want to about it. I think this is a confusing question, but I know what I'm trying to ask in my head, I just can not get it out.
Maybe I'm suffering from lack of sleep. T_T'

Very good question! Some vitamins and minerals are water-soluble, and we'll simply excrete any overdose without a problem. Others are fat-soluble, and will accumulate in the body tissues. Vitamin and mineral overdose in humans can cause significant health problems. http://www.mindbodyfocused.com/articles/body/supplements/vitamin-over-use.php

And dogs: http://www.petplace.com/dogs/vitamin-toxicity-in-dogs/page1.aspx

I've done a little research, and can't find anything detailed and specific to gliders, though Suz's has some information: http://www.suzsugargliders.com/feedingyourglider.htm . I think that there's just not enough knowledge yet to establish RDAs of vitamins and minerals. If someone knows of any, please post as this is information we can all use.

I believe there's an article in Gliderpedia on hypervitamintosis (sp?) as well. Look on the home page.