rs1021737(T;T) The above CTH mutation states I have "significantly higher plasma total homocysteine concentration". I also have some hetero MTHFR mutations. My lab results a few weeks ago put my homocysteine plasma levels at 12.2 with the range of the lab being 0.0-15.0 umol/L. Is 12.2 too high? Is this CTH mutation along with my MTHFR causing higher levels and possible issues with my health? I have POTS and anxiety (due to all the adrenaline and tachycardia) btw....not sure if it's relevant but it's definitely got me more interested in my genetics. Thanks!