Also, I didn't mean that to sound belligerent, sorry. I have a great deal of respect for your knowledge and insight, as well as a love for bang flop terminal performance on game.
FWIW, here's all I've been able to find on the topic so far:
Twenty three adults ingested 203Pb as lead acetate on the 12th hour of a 19 h fast. Retention measured 7 days later in a whole-body counter was 61% and whole-body turnover rates suggested that initial uptake had been considerably greater. Balanced meals eaten with 203Pb reduced lead uptake to 4%...
pubmed.ncbi.nlm.nih.gov
While promising, this research does not exactly make it clear that any old meal will drastically reduce lead absorption in the body.