vitamin b12 injections im or sc Best Injection Sites Vitamin B-12 Cyanocobalamin
1000 mcg

Sublingual transport is the best way to get B12 absorption (research has proven it's even better than B12 injections for increasing B12 sufficiency)

Every D-code family has a temporary unspecified version (D50.9, D51.9, D52.9, D64.9) and a specific etiology-based version

While vitamin B 12 deficiency is not a primary test in newborn screening programs, a study showed that markers C3, C3/C2, and C3/C16 exhibit a negative correlation with maternal levels of vitamin B 12 in the first trimester of pregnancy, and thus may bear diagnostic value (Dayaldasani et al., 2014)

Methylation Reactions: Methylation is a biochemical process essential for various physiological functions, including neurotransmitter synthesis, hormone regulation, and DNA repair