- Epileptics with high homocysteine levels i.e. > 10.9 µmol/L (Normal homocysteine levels are 4.3-9.9 µmol/L for male and 3.3-7.2 µmol/L for female adolescent and a high homocysteine concentration is deaned as at least 11.4 µmol/L for male and at least 10.4 µmol/L for female. Gender mean of high homocysteine concentration is 10.9 µmol/L) [5]