With the exception of vitamins K and D, the body cannot synthesize vitamins and minerals naturally. Their intake through food is therefore essential for the normal functioning of the body. Vitamins and minerals do not work the same way. They each perform specific, essential functions: Vitamins B2, B3, B6, B9, B12, C, and iron help reduce feelings of fatigue and fight drops in energy. Vitamins A, B6, C, D, and selenium and iron contribute to a healthy immune system. Vitamins C and E, and manganese, zinc and selenium help fight oxidative stress. Iron contributes to good cognitive capabilities (memory, concentration, etc.). Not recommended for people who are allergic or sensitive to one of the productâ€™s constituents, Dietary supplements must not be used as a substitute for a varied and balanced diet and a healthy lifestyle, Do not exceed the recommended daily dose, Keep out of reach of young children, Store at a temperature below 25Â°C, and away from light, heat and humidity. Vitamin B5 helps maintain good intellectual performance.