Noun
originally thought to be a single vitamin but now separated into several B vitamins
Source: WordNetI only take vitamin B complex. Before World War II, I used to take ionized yeast, because in the pre-war era we never heard about vitamins. John Gokongwei
Doctors gave him a Vitamin B complex and Vitamin C IV and plain IV fluids. Source: Internet
There are 13 different types of vitamins, including vitamins A, B complex, C, D, E, and K. Because most vitamins cannot be made in the body, we must obtain them through our diet. Source: Internet