Where to Best Find These Products in Bangkok?

Dear Ted thank you, for giving important suggestion, some of them I remember to hear from a friend "naturopata doctor" back in Italy over 10 years ago.

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.

thank you, best regards

cristiano