From: Total plasma homocysteine, folate, and vitamin b12 status in healthy Iranian adults: the Tehran homocysteine survey (2003–2004)/a cross – sectional population based study
Normal
tHcy < 15 μmol/L
Mild HHcy
tHcy 15 – 30 μmol/L
Moderate HHcy
tHcy 30 – 100 μmol/L
Severe HHcy
tHcy > 100 μmol/L