In fact, I have seen t-shirts that say, "Genetically I am one bad MTHFR."
MTHFR aka Methylenetetrahydrofolate Reductase
"Methylene tetrahydrofolate reductase is the rate-limiting enzyme in the methyl cycle, and it is encoded by the MTHFR gene." ~ Wikipedia
I recently found out that I have two copies (homozygous) for MTHFR C677T.
It seems to a large "missing piece" of my health puzzle. Perhaps several missing pieces!
Some more information on MTHFR:
MTHFR.net