Injectable and oral forms of supplements are available. The injectable types may be more useful for those with deficiencies due to problems with absorption.
It usually contains only the main vitamins of the B Complex, except on medicines with a complete formulation thus containing all the vitamins and minerals as well.
B complex is a compound of all eight B vitamins Vitamin B1 (thiamine) Vitamin B2 (riboflavin) Vitamin B3 (niacin or niacinamide) Vitamin B5 (pantothenic acid) Vitamin B6 (pyridoxine, pyridoxal, or...