The relationship between geographical location and vitamin B12 levels.
The results of this study support the previous findings for the four regions in Jordan; Irbid, Karak, Tafila, and Ma’an, where the percentages of B12 deficiency in these regions were 41%, 35%, 27% and 26% respectively 57. The current study evaluated B12 deficiency in Aqaba, which was found to be 24.6%. Figures 2 and 3 illustrate a comparison between the frequencies of vitamin B12 deficiencies in five regions that cover Jordan from north to south.