Conclusions
To our knowledge, this is the first study to determine the prevalence of B12 deficiency in Aqaba province. Vitamin B12 levels were strongly and significantly correlated with gender and Hb, RBCs, PCV and Platelet count with non-significant relation to age and MCV. Additionally, the study confirmed that Aqaba, like other southern regions in Jordan, is characterized by a lower frequency of vitamin B12 deficiency compared to the other regions in Jordan. Further studies are needed in other regions of Jordan such as the eastern regions (Mafraq and Azraq) to complete the national portrait of the vitamin B12 level in Jordan.