However I live in Bangkok and I find very difficult to buy most items such vitamin C in powder, borax, magnesium POWDER, manganese etc...
I'm sure you can help me on that and if you got time will be glad to meet you sometime.
Replied by Ted (Bangkok, Thailand) on 08/19/2011
Where to Buy in Bangkok Try Vittayasom on Rajdamnern Road, near Kaosarn Road.