Methylcobalamin is a physiologically active form of vitamin B₁₂. Vitamin B₁₂ contributes to the normal functioning of the nervous and immune systems, normal psychological function, normal homocysteine metabolism, normal energy-yielding metabolism, and the reduction of tiredness and fatigue. It also contributes to normal red blood cell formation and supports iron absorption.

As a food supplement, Vitamin B₁₂ 1000 μg is recommended for people at increased risk of vitamin B₁₂ deficiency, including older adults, people with certain health or physiological conditions, people taking certain medications, and those who do not obtain sufficient amounts of this vitamin through their diet.

Pregnant and breastfeeding women may use this product upon the recommendation of a physician.