Table 1. Methionine, folate, B12, and B6 levels in diets
Nutrient content per kg diet
Diet Mice, n D/L-Methionine, g Folate, mg B12, μg B6, mg
Control (AIN93M) 10 3.3 2 25 7
M+B–
   Methionine-rich B vitamin-deficient 12 7.7 0.11* 1.8* 0.15*
B–
   B vitamin-deficient 13 3.3 0.11* 1.8* 0.15*
M+B+
   Methionine-rich B vitamin-rich 12 7.7 6 75 21
  • * Residual vitamin content assayed in diets. Values represent 5.5, 7.2, and 2.1% of AIN-93M recommended (control) levels of folate, vitamin B12, and vitamin B6, respectively