Many people cant get enough B12 from food alone, so they take vitamin supplements or get B12 injections
measured B12 levels in 51 mothers, placentas, and infants post-delivery, and found that the intervillous space in the placenta contained a higher concentration of B12 (796 pmol/l) than the blood of the mothers (590 pmol/l) or their newborns (252 pmol/l)
Qin Z, Zhang G, Jiang S, Ning F, Zhao Z, Huang M, et al
Conclusion: Innate and adaptive immune cells have distinct distribution profiles in the salivary gland tissues of patients with pSS and are associated with different mitochondrial metabolic pathways, which may contribute to disease progression
Supplementary Figure 6 Population distribution of the 108 Pioneers (PC1 vs PC2) PCA using a sample of 250,000 common SNPs