Clinicians Vitamin B12 Liposomal supports sound sleep, alertness, mental clarity and mood and supports energy levels and vitality Vitamin B12 can be poorly absorbed by those with weak or ageing digestive systems. Using liposomal technology Vitamin B12 Liposomal is more bioavailable and comes in an easy-to-take liquid format. This formula uses the active form of B12, methylcobalamin, that is immediately usable in the body. Liposomal spheres created from sunflower oil to provide a delivery capsule of phospholipids, the same substance as our cells. These are filled with our Vitamin B12 and their small size allows them to pass easily through the digestive system for immediate cellular support.