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, and 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 stored in the bones.
02
The home test is upstream.
Find the source and get rid of it, and the blood result follows in 1-2 months.
03
Calcium, iron, vitamin D matter.
All three compete with lead at the gut absorption step.