<b>Active, coenzyme form of vitamin B12</b><br><br>Methylcobalamin is the active, coenzyme form of vitamin B12, prepared as a liquid for rapid and efficient absorption. In addition to its role in supporting red blood cell function, methylcobalamin is the preferred form of B12 for regulating homocysteine and for supporting numerous aspects of neurological health.*<br><br><b>Three Brands Become One</b><br><br>Since 1969, Klaire Labs® has been dedicated to developing clean, efficacious nutritional supplements to ensure optimal outcomes for even the most sensitive individuals. This enduring commitment to quality is at the root of the unification with sister brands <b>Complementary Prescriptions</b> and <b>ProThera</b>. These three brands have unified with a modernized look based on the legacy Klaire Labs® logo.