GMP standards. I have used them for years without issue. B 12 is B12. If you can get it isolated, great, if not use the complex. It is made to high quality, just not paying the human pharm price
GMP standards. I have used them for years without issue. B 12 is B12. If you can get it isolated, great, if not use the complex. It is made to high quality, just not paying the human pharm price