On the internet. It is crystalline and you dissolve it in water. My tub states that it is good to take a multi vitamin along with it.
I did a search and the first US site I found was this
http://www.iherb.com/Search?kw=choli...trate&cid=1855
Hope this is of use
PS it is also supposed to boost brain power when you get into your 50's. Not found any difference yet! LOL