My doc recommended the same thing in 2019. I still use this - https://www.amazon.com/Jarrow-Formulas-Methylcobalamin-B12-Supports/dp/B002FJW3ZY/ref=mp_s_a_1_3?dchild=1&keywords=jarrow+vit+b12+1000&qid=1619526853&sr=8-3
