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Supplied as a 10 mg lyophilized vial for in-vitro laboratory research use only

Some research from Germany has shown that an even higher threshold (over 500 pg/mL) is necessary in early-to-mid pregnancy to maintain vitamin B12 levels throughout pregnancy, lactation, and to support an infants vitamin B12 status (via breast milk) through 6 months of age

Researchers running tight budgets or working with limited supply sometimes rationalize extending a vial by a few days

Methylcobalamin, on the other hand, is bioactive, meaning its ready for your body to put to work immediately

Free Radical Biology & Medicine, 95 , 27-42