Opti-Men is much more than just a multi-vitamin. The 39 active ingredients that go into Optimum's unique formula will help to optimise your physical and mental performance. What does it do? When you're training hard, your body has greater nutritional needs. It's not always possible to source these solely from your diet every single day. Vitamins and minerals provide a vital nutritional boost to help you cope with the demands of a fast-paced lifestyle.