ULTRA B ACTIVE is a potent-strength vitamin B formulation using activated forms of vitamin B2, B6, and mecobalamin (B12), together with other B-group vitamins to optimise energy levels, relieve fatigue and support nervous system health. 60 Film coated Tablets. This formulation also supports cognitive and nervous system function using highly activated forms of vitamin B working to metabolise carbohydrates, proteins and fats. ULTRA B ACTIVE features upper level doses of mecobalamin (Vitamin B12) 300 mcg and Pyridoxal-5-phosphate (Vitamin B6) 15 mg.