What Does Vegan Multi Do ? Vitamin B1, B2, B3, B5, B6, B12, C, And Iodine Contribute To Normal Energy-Yielding Metabolism. Vitamin B2, B3, B5, B6, B12 And C Contribute To The Reduction Of Tiredness And Fatigue. Vitamin B2, C And E And Zinc Contribute To The Protection Of Cells From Oxidative Stress. Vitamin C Contributes To Maintain The Normal Function Of The Immune System During And After Intense Physical Exercise Vitamin A, B6, B12, C And D, And Zinc Contribute To The Normal Function Of The Immune System Vitamin B1, B2, B3, B6, B12 And C, And Iodine Contribute To Normal Functioning Of The Nervous System Vitamin A, B2 And Zinc Contributes To The Maintenance Of Normal Vision