The special combination of B vitamins, vitamin C, magnesium and zinc helps to provide the brain and nerves with energy, supporting mental and physical performance.
Berocca® Performance is a performance multivitamin that helps improve mental performance and physical stamina. It contains a specific combination of B group vitamins and vitamin C, enhanced with added calcium, magnesium and zinc. When taken daily Berocca® is a healthy way to get more out of every day. (2016 Pubmed)
Alternatives: Berocca is a Nootropic, another similar performance enhancing B-Vitamin stack is H.C.F, which I've used myself, it's not a hardcore Nootropic but it is a performance enhancer.
Alternative Drugs: Revive, B-Active, ASDA Energise