Read on the forum that USP Glycerin and USP Veg Glycerin are both fine. I bought some USP Glycerin from Shoppers thinking it would be fine, and when I mixed my first batch of juice I found it really coated my mouth and throat and masked the flavor I had made, not to mention a soar throat. I looked into the CAS 56-81-5 glycerin MSDS, and WOW didn't like what I read.
http://www.sciencelab.com/msds.php?msdsId=9927350
"May cause adverse reproductive effects......including sperm morphology........May effect genetic material.
I have all the kids I want, but still, I think I will make sure to get USP Veg Glycerin, and not just any Glycerin that says USP.
I guess its worth the wait to order online USP VG rather than to buy USP G that's easy to find....
Just make sure it's Vegetable not Animal.

http://www.sciencelab.com/msds.php?msdsId=9927350
"May cause adverse reproductive effects......including sperm morphology........May effect genetic material.
I have all the kids I want, but still, I think I will make sure to get USP Veg Glycerin, and not just any Glycerin that says USP.
I guess its worth the wait to order online USP VG rather than to buy USP G that's easy to find....
Just make sure it's Vegetable not Animal.
