While no single vitamin can directly give you energy, vitamin B12 is crucial in energy production. It facilitates the conversion of food into glucose, which the body uses for fuel, and produces red blood cells, which carry oxygen throughout the body.
Without enough vitamin B12, you may feel tired, weak, and lethargic. Other B vitamins, such as thiamin (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), and pyridoxine (B6), also play a role in energy metabolism and can help to support healthy energy levels.