(vitamin B9, vitamin BC, pteroil-glutamic acid, folate, folacin, vitamin M)
Name of folic acid comes from the Latin word folium, which means leaf. Folic acid was first isolated from spinach, then from the liver. This vitamin is very common in biological systems.
In 1935 it was noted the lack of some nutrient in monkeys. It is now known that this disease occured due to a lack of folic acid. To factor that caused this disease was given name vitamin M. Later, similar symptoms were observed in chickens and men, and the name of folic acid was given by Mitchell, Snell and Williams, who were isolated it from spinach.