I've been trying to find a nice lube with safe ingrediants but so far i've found very few and even those have been question. I've read that Vegetable Glycerin is made from vegetable oil and is good for the skin. But i've read that Glycerin can cause skin irritant in some people and in concentrated solutions can damage the mucous membranes. Is there a deffernce with Vegetable Glycerin and just plain Glycerin? or is it the same thing? Is it safe enough to use in lubes? What other ingrediants should i be warry about?