You should always opt for stocking up on pure and efficient methylcobalamin-based B12, making sure to read the ingredients label carefully for any hidden nasties, and reach for a daily dose that will meet your requirements, plus some to ensure absorption (2000mcg weeky for adults under 65 should do the job just fine!)
Unfortunately, plant foods have no vitamin B12, unless they have been fortified
Fat-soluble vitamins (A, D, E, and K) are stored in fat tissue and the liver
The American Academy of Pediatrics considers vitamin B12 to be compatible with breast-feeding
Dosage and Administration: Follow the recommended dosage and administration instructions provided by your healthcare provider or the manufacturer
2018, doi:10.1155/2018/1968450 Tabrizi R, Ostadmohammadi V, Lankarani KB, et al