Pro Tri B12Combines three different forms of vitamin B12. Combines three different forms of vitamin B12: hydroxycobalamin, adenosylcobalamin and methylcobalamin High dose of bioavailable and active forms of B12 Own supply from Europe Pro Tri B12 is a combination of three independent and active forms of vitamin B12. Methylcobalamin, hydroxocobalamin, and adenosylcobalamin are three distinct cobalamin factors, each with their own unique benefits. When taken