Pre & Intra Workout: Energy and Endurance Boost Vitamins, supplements and powdered drinks for pre-workout energy boost and intra-workout hydration and endurance support L-Carnitine Plus – Pre Workout & Metabolism Boost Complex £14.99 Taurine Supplement – Energy & Performance £9.99 Electrolyte Powder – Rapid Rehydration with Himalayan Salt £21.99 Electrolyte Capsules – Pro Hydration Formula £9.99