What the Research Actually Says

Sub-acute CO exposure from kitchen stoves is largely invisible — and the evidence suggests it's not harmless

Sub-acute CO exposure from kitchen stoves is largely invisible — and the evidence suggests it's not harmless

Unregulated private wells can harbor nitrate levels that trigger a life-threatening oxygen crisis in infants — here's what the evidence says and what to do about it.

Unregulated private wells can harbor nitrate levels that trigger a life-threatening oxygen crisis in infants — here's what the evidence says and what to do about it.

The landmark 6-day dietary switch study showed something striking — and the timeline will surprise you.

The landmark 6-day dietary switch study showed something striking — and the timeline will surprise you.

When manufacturers swapped out BPA, they often replaced it with chemicals that may carry some of the same biological concerns — and researchers are still working out what that means for human health.

When manufacturers swapped out BPA, they often replaced it with chemicals that may carry some of the same biological concerns — and researchers are still working out what that means for human health.

How a common preservative works in the body, what the science actually shows, and practical steps for reducing your child's exposure.

How a common preservative works in the body, what the science actually shows, and practical steps for reducing your child's exposure.

The chemical keeping your hands "extra clean" may be quietly disrupting your child's hormones and gut bacteria.

The chemical keeping your hands "extra clean" may be quietly disrupting your child's hormones and gut bacteria.

The sofa you inherited from your parents may be quietly exposing your child to chemicals linked to neurodevelopmental harm — here's what the evidence says.

The sofa you inherited from your parents may be quietly exposing your child to chemicals linked to neurodevelopmental harm — here's what the evidence says.

The carpet your child plays on every day may be releasing chemicals linked to immune disruption and neurodevelopmental harm — here's the evidence, and what you can actually do about it.

The carpet your child plays on every day may be releasing chemicals linked to immune disruption and neurodevelopmental harm — here's the evidence, and what you can actually do about it.

How a common chemical reaction in everyday snack foods creates a neurodevelopmental risk for babies and toddlers — and what you can actually do about it.

How a common chemical reaction in everyday snack foods creates a neurodevelopmental risk for babies and toddlers — and what you can actually do about it.

Why two everyday children's foods can quietly add up to a meaningful arsenic load — and what you can actually do about it.

Why two everyday children's foods can quietly add up to a meaningful arsenic load — and what you can actually do about it.

How a heavy metal hiding in your baby's first food gets into the body—and what the evidence actually says about reducing exposure.

How a heavy metal hiding in your baby's first food gets into the body—and what the evidence actually says about reducing exposure.

Too little manganese harms the developing brain — but so does too much, and soy formula and well water can tip the balance.

Too little manganese harms the developing brain — but so does too much, and soy formula and well water can tip the balance.

Ten household interventions, each with the research behind it. Most are one-time. Most are cheap. All of them move a number that's measured in your child's IQ points, hormones, and developing brain.

Ten household interventions, each with the research behind it. Most are one-time. Most are cheap. All of them move a number that's measured in your child's IQ points, hormones, and developing brain.

Most American kids have insufficient vitamin D levels. Deficiency is associated with mood symptoms, immune dysfunction, and reduced cognitive performance. Sun exposure — not just supplements — is part of the solution.

Vitamin D has been rebranded so many times — bone vitamin, immune vitamin, mood vitamin — that its importance has gotten muddled. The clearer summary:

Glyphosate is the most widely used herbicide in history. It disrupts the bacteria in your child's gut. Those bacteria help regulate your child's brain. The connection matters.

Most parents have heard "Roundup" and know vaguely that it's controversial. What fewer parents have is a clear mental model for why the active ingredient…

Microplastics are now documented in placental tissue, breast milk, testicular tissue, and infant feces. The exposure question isn't whether your child is exposed. It's how much, and whether it matters.

Here's the rough state of the evidence on plastics and children's health as of the mid-2020s:

The EMF conversation has been hijacked by both sides. One camp says "it's all fine, stop worrying." The other says "it's causing everything." The useful middle is specific, measurable, and worth knowing.

Electromagnetic fields (EMFs) are an area where the information environment is uniquely unhelpful. Mainstream medical guidance tends toward reassurance…

The antibacterial "kitchen cleaner" you're spraying three times a day is not just removing germs — it's rearranging the microbial ecosystem your child's immune system and brain depend on.

A century ago, most childhood illness came from microbial exposures: tuberculosis, polio, diphtheria, cholera, dysentery. Public health investments in…

The European Union has banned or restricted over 1,500 chemicals from personal care products. The United States has restricted about 30. Everything else is fair game for what's in your kid's shampoo.

The regulation gap between the EU and the US for personal care is one of the cleanest illustrations of how permissive the American consumer-product system…

The EPA regulates about 90 contaminants. The Environmental Working Group has detected over 300 in American tap water. The gap between what's legal and what's safe is larger than most parents realize.

Most families in the U.S. drink municipal tap water on the assumption that because it's delivered by a utility, tested to federal standards, and…

You're staying inside to escape air pollution. You're escaping into worse air pollution. A systematic home-air audit, done once, changes the developmental environment your child lives in for years.

The cognitive dissonance is real. Parents keep kids inside on "bad air quality" days. Smog alerts go up; windows go down. The logic is that outdoor air is…

In 2024, the U.S. government's own National Toxicology Program concluded that fluoride is "presumed to be a cognitive neurodevelopmental hazard to humans." Your tap water is probably still fluoridated. Here's what changed.

For about 70 years, questioning water fluoridation was sociologically unacceptable. The dental establishment insisted it was safe and effective. The CDC…

Your child's pajamas, the shower curtain, the rubber ducky, the mattress cover, the "new car smell" — these are not passive decorations. They are active hormone inputs, and the developing endocrine system can't tell the difference between its own signals and theirs.

Here's the thing about endocrine disruption that takes most people a minute to internalize: the developing human body doesn't have a special filter that…

Every 10-fold increase in prenatal organophosphate exposure drops a child's IQ by 5.5 points. These compounds were originally developed as nerve agents for chemical warfare. We spray them on the food your kid eats.

If you wanted to design a chemical specifically engineered to derail a child's neurological development, you'd want it to:

Visible mold in a home reliably predicts childhood asthma. Less visible mold — the kind growing behind drywall or inside an HVAC system — can drive chronic inflammation and cognitive symptoms that most pediatricians won't connect to the building.

Here's a clinical scenario that plays out in pediatric offices thousands of times a year and usually ends in the wrong diagnosis:

The EPA estimates indoor air is 2-5x dirtier than outdoor air — up to 100x worse for specific pollutants. Your new couch, your fresh paint, and the "air freshener" in the hall are all actively contributing.

You bought the couch. You were careful — read some reviews, paid more than you wanted to, got it delivered. It arrived with that distinctive "new…

Fish are one of the best brain foods on the planet. Some of them are also one of the worst neurotoxic exposures your child will ever have. The two facts coexist, and the distinction matters enormously.

Pediatric nutrition advice around fish is a mess of mixed signals. The American Heart Association tells you to eat more fish. The EPA tells pregnant women…

There is no safe level of lead exposure. The EPA permits 15x more lead in your drinking water than pediatricians say is acceptable. And the biggest exposures in modern American homes are nowhere near where most parents are looking.

The lead paint got banned in 1978. The leaded gasoline got phased out in the '80s. The problem is handled, right?