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Six audience-specific paths. Each one is a complete walkthrough for that situation.

Prenatal vitamins · formula · baby food · your own diet during pregnancy. The 0–6 brain window and what feeds it.

Paint · dust · windows · water · soil. Walk through every renter and homeowner should do once. Pre-1978 priority.

Imported. Vintage. Hand-painted. Hand-me-down. Which categories fail. The 30-second drop test for any piece.

Cardiovascular · cognitive decline · bone resorption. Your lifetime lead burden, the kid in your house, the audit you owe both.

Just bought a kit? The first ten surfaces in priority order, what counts as a positive, what to do when something glows.

Pick the foods your kid eats. Get total micrograms of lead, cadmium, arsenic, mercury per day. 1,343 foods, 4 metals, free.

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Working calculators and searchable databases. All free, no signup.

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If you'd rather follow the pre-set sequence: 6 stages, in order.

If you're ready to buy, both routes: