Table 3: Frequencies of mutations studied in different populations.

Country (reference)Burkina FasoPakistan [10]China [11]South Korea [12]Sweden [13]Brazil [14]
GenesGenotypes%%%%%%

MTHFR C677TCC90.071.332.828.555.953.8
CT10.026.243.952.935.840.4
TT0.02.523.318.68.45.7

MTHFR A1298CAA78.620.866.867.8
AC19.048.729.330.3
CC2.430.53.91.9

MTR A2756GAA61.952.464.8
AG33.338.830.9
GG4.88.84.3

MTRR A66GAA50.055.216.7
AG45.038.250.8
GG5.06.632.4