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Together, the group of B vitamins is referred to as vitamin B complex. These water-soluble vitamins are critical to cell metabolism. The B vitamins play several important roles in the body, including: 1  Promoting cell growth and division. 2  Maintaining healthy skin and muscle tone.
Vitamin B12 Deficiency and its Neurological Consequences. B complex vitamins are important for various functions of the human body. Be it energy production, body defense mechanisms, or red blood cell formation, the B group vitamins play pivotal roles and carry on the functions by working in tandem or all alone. Vitamin B12, in particular, has a great impact on neurological health.