Marnys® Vitamin B12 in certified high-quality liquid form also allows for rapid release of the active ingredient and its absorption into the body. Marnys® Liquid Vitamin B12 is a dietary supplement for all ages, during the growth and development of children and adolescents, for metabolic and neurological maintenance in adults, and for pregnant women throughout pregnancy. Directions for use: 0.5 ml daily, preferably in the morning.