Vitamin b complex is categorized in different form depending on their role in body function, it plays many vital role in metabolism of food substrates ,mentaining health of body structure like skin ,hair and also protecting major system of body such as nervous, alimentary, endocrine and many other, to full fill the daily requirements of body from this vitamin ,daily diet must contain a variety of food sources like vegetables & fruits which are rich in this vitamin b and also other nutrients. For more detail watch this video.