The B-vitamins participate in the formation of enzymes and are indispensable for the metabolism of fats, proteins
and carbohydrates and for normal growth of muscular and nervous tissues. The deficiency of only one vitamin
is rarely encountered. However, even in such cases it is advisable to administer the whole complex in order
to prevent a possible deficiency of other vitamins. After intramuscular injection, the vitamins are quickly and
completely absorbed and a rapid therapeutic effect is attained in vitamin deficiencies.