Doctor’s 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 best-utilized B vitamin forms. This includes fully active folate, the body?s most fully active folate and MTHF (methyl-tetra-hydro-folate). The Fully Active B Complex also provides fully active vitamin B12 as methylcobalamin (methyl-B12) to help ensure excellent oral absorption.