The energy formula with the double effect Sufficient physical activity and a healthy, balanced diet are essential for maintaining physical activity and mental fitness well into old age. An adequate supply of nutrients plays a crucial role in health and performance. Our bodies often cannot produce these nutrients themselves. They must be obtained daily through food. An unbalanced diet or increased need can lead to deficiencies. Doppelherz system VITAMIN B12 PLUS contains a combination of nutrients that contribute to normal mental performance, concentration and the reduction of tiredness and fatigue: 10 g dextrose Vitamin B12, vitamin B1 and pantothenic acid 75 mg caffeine 100 mg choline The perfectly balanced nutrients are contained in a practical drinking bottle - ready to drink immediately with a delicious orange-grapefruit flavor – ideal for on the go.