Instant ‘B’ – an oral dietary reinforcement solution for horses with added B group Vitamins. Also highly recommended for horses feeding on premixed and processed feeds or high grain rations!Horses cannot store B Group Vitamins within the body for long periods of time and require a constant daily intake. The requirements are a balance between dietary intake and bodily expenditure with many functions creating excessive losses. If a horse has twice the vitamin expenditure it cannot double its food intake to recoup the losses.