Dolly,
1. It would contribute a little. In this situation it is more likely diet and accumulation of oxalates overtime.
2. Not necessarily. If the level is below the high point on the reference range I might continue yeast treatment in someone I know has a past history of yeast. Otherwise, in most circumstances I would likely stop.
3. Yes. This would be okay.
We always have to watch for a rare occurence with L-carnitine though. It happens very, very rarely, but in some people with L-carnitine use they can develop a rotten fish smell. It has to do with intestinal bacteria and L-carnitine can be a trigger. Again, I have only seen in twice in many, many years of practice.
Sincerely,
Dr. Woeller