For the record, I am 71 and have been shooting for over 65 years. I recently had my first blood test for lead levels and scored 13.2. My doc is concerned but admits he is not a specialist and offered a referral. I am an NRA Certified Instructor so am regularly on indoor ranges, one of which allows lead bullets. 10 years ago, I competed regularly in IPSC matches, some of which had an indoor stage. I also was a SASS shooter for 10 years. I reloaded lead bullets for both sports, so I have no idea whether or not the accumulation is recent and associated with shooting/sweeping indoor ranges or is long term from reloading or using a tumbler to clean brass.
Yeah, I will probably die of something else but I use my seat belt, lock my doors, don't smoke, carry a handgun, eat well, keep my weight down, exercise regularly.
I'm curious about supplements and those who report that lead levels declined or at least fluctuated over time. At my doc's recommendation, I will have another test in 6 months. If lead level is stable, or hopefully declining, I will continue good hygiene and hope for the best. Perhaps let others sweep up after classes. Most of my shooting is outdoors, but instruction puts me at some risk even though I use the special lead soap and wipes after class, wash my shooting/teaching clothes separately, don't eat after shooting, etc. Then hope for the best.