Hey, I recently got some results back which my doc (CFS empathetic) says suggests a folinic acid issue. The tests I had done were: Ammonia (blood) - normal Methylmalonate Acid (blood) - normal Homocysteine (blood) - 12.8 (normal is less than 9) He says the homocysteine abnormality suggests a methylation issue, but the normal methylmalonate test suggests that b12 is OK - which means folinic acid is the problem. If anyone has any thoughts on this in regards to the tests, their experience with folinic acid, knowledge on the issue, known quality folinic acid brands, etc... I'd appreciate your response. UPDATE: A urine tests has come back. Hydrogen Sulfide - Strongly Positive Any thoughts/suggestions on this are also appreciated.