WHAT IS glycine-betaine ?

i cant find out how to get some and how to use it and how it works.

http://en.wikipedia.org/wiki/Betaine
sounds like its a substance obtained through the enviroment to help out with stressful conditions
they say it plays a big role in acclimatization

were can we get it and i heard you can spray your plants and it will give you alot more buds and plant growth. its natural they get it from prossesed suger cane or beets. but i cant get ahold of of any and dont know were to find any. respond if you have more info.