I tested 11 once . Told the doc what I did and admitted to being a little casual with drinks and things around the bench .
Not long after word I was layed off for about 5 months. During which time I did a lot more casting and shooting. I was down to 7 in 6 months . Turns out it was the old GI galvanized frames and oxidized lead based paint at work causing the issues.
Today I test about every other year and I'm at 3-4 .
Chelation can be accomplished self medicated with orange or grapefruit juice . A problem that can happen with medical grade is that it will start to draw long term exposure out of the bones and make it worse than it was to begin with.
Look at all of the possible exposures when you start looking at mitigation you might be surprised at where its coming from.