Doctors Best Fully Active B Complex provides energy and helps coping with stress.* B vitamins are needed to make energy from foods and to make and maintain DNA genes cells tissues organs and enzyme functions. B vitamins are fundamental to life and humans cannot make them therefore we need to get them through the diet. Doctor?s Best Fully Active B Complex provides only the bestutilized B vitamin forms. This includes fully active folate the body?s most fully active folate and MTHF (methyltetrahydrofolate). The Fully Active B Complex also provides fully active vitamin B12 as methylcobalamin (methylB12) to help ensure excellent oral absorption.