nutrient
Methylcobalamin
A coenzyme form of vitamin B12 involved in methionine synthase activity.
Methylcobalamin is one of the metabolically active B12 forms. Product evidence and dose depend on the specific form and context.
What the form means
Methylcobalamin participates in the methionine synthase reaction and is one of the active coenzyme forms of B12.
Forms
Methylcobalamin is a form of Vitamin B12 (cobalamin).
Methylcobalamin is a named chemical form within its parent vitamin family.
Worth knowing
One active coenzyme form. Methylcobalamin is a metabolically active form of vitamin B12 used in the methionine synthase reaction. It is one named form within the B12 family, not a separate nutrient.
A closer look
An active form is not proof of better absorption
A supplement can provide methylcobalamin directly, while other products provide cyanocobalamin that the body converts into active forms. NIH ODS does not find evidence that supplement absorption differs by B12 form, so “methyl” by itself is not proof of superior results.
References
Source-checked local draft.
Human editorial review pending.