by Source Naturals. It is really inexpensive for the quality.

I've seen it a Whole Foods locally when shopping. (they had it on sale once there where I picked up 2 xtra bottles).

I usually buy mine from iherb, when I get my B12 order. Source Naturals is
a common brand and you should be able to find it in most health food stores.

When I did some searching a few months ago, I found papers that stated that the zinc monomethionine is better absorbed. So this form gives the best
bioavailability, and is not expensive either. The old zinc sulfate is very nauseating.. avoid it!
here is a good zinc website:
http://www.advance-health.com/zinc.h...Monomethionine