# B12 cobalamin ## Best way to test it.... "We showed here that the urinary MMA assay was much more effective than the serum cobalamin assay in identifying individuals at risk of vitamin B12 deficiency" ## History - Even high in aug - Had an odd instance of being really high in 2022 which was worrysome. Might have been from all the gardening. - Never been low according to all the blood tests. - #Supplement ## Related - [[quantified self]] - [[my blood]]