FLUORO|SPEC
BRAUN ET AL · NHANES
Childhood lead
quadruples ADHD risk.
Top blood-lead quintile children show 4.1x the ADHD prevalence of the bottom quintile. The relationship is monotonic and dose-responsive. There is no apparent safe lower bound.
01
What the data shows.
NHANES blood-lead in 4-15-year-olds, segmented into quintiles, correlated with parent-reported ADHD. The dose-response is smooth. Every increment of blood lead adds to the ADHD risk.
Dose-response, not threshold.
The historical framing was "below the action level is safe." The data does not support that. The bottom quintile still shows elevated risk versus the cleanest 5% of children.
02
What that means for a parent.
01
A blood test is a snapshot.
It tells you what is circulating today. Not what is in the bones.
02
The home test is upstream.
Find the source. Remove the dose. The blood result follows in 1-2 months.
03
Calcium, iron, vitamin D matter.
All three compete with lead at the gut absorption step.