Here are the cheapest options we found: Lower dose vitamin B12 tablets (10mcg) Vitamin Store Vitamin B12 (2 for 180 tablets) at Savers and Wilko = 1p per daily dose Superdrug Energy vitamin B12 (2.99 for 60 tablets, 5p per tablet, Superdrug) = 5p per daily dose Boots Vitamin B12 (3.20 for 60 tablets, 5p per tablet, Boots) = 5p per daily dose There is also a spray which gives 10mcg per two sprays (VitSpritz vitamin B12 oral spray, 9.95 for 30ml, Sainsbury's) but it costs more per dose = 8.6p per daily dose Higher dose vitamin B12 (1200mcg) Many of these are spray formats: Better You B12 Boost oral spray 1200mcg (9.90 for 25ml, Tesco) Four sprays gives 1200mcg of B12 = 20p per daily dose
Over 11 years: This group is subject to the same rate for adults
These work best when you DONT DRINK your calories
Use this table as a quick map, then read each full review below for the lab data and the one caveat that matters most
Whichever you choose, read the current certificate of analysis before you buy, and keep everything strictly for laboratory research use, which is the only basis the FDAs drug-approval process leaves open