NOW Foods Vitamin B-12 Liposomal Spray delivers methylcobalamin — the most bioactive, neurologically relevant form of B-12 — in a sublingual spray using liposomal encapsulation technology for dramatically enhanced absorption. Liposomes are tiny phospholipid vesicles that mimic the structure of cell membranes, allowing the B-12 inside to merge with the mucosal lining of the mouth and be absorbed directly into the bloodstream — bypassing the gastrointestinal tract entirely. This makes liposomal B-12 the best option for those with compromised intrinsic factor production (common after age 50 and in those on acid-blocking medications), as well as vegans, vegetarians, and anyone with known B-12 deficiency. Each spray delivers a precise dose of methylcobalamin for nervous system support, red blood cell formation, and energy metabolism.