Falcon - you are incorrect. I hesitate to write this because your wit and wisdom is revered around the world.
Having worked with deuterium and tritium, the two isotopes of hydrogen, at a department of energy lab, and tested for tritium daily, I can assure you that the proportion of these in your body never changes. Unless you:
1) inhale tritium or deuterium
2) ingest heavy water (D2O), or tritiated water
3) get exposed to radiation,
all of which have been know to happen in research facilities. But I don't think you are working at one of these. I could be wrong though.