The theme this week: origins, and a countdown. Several of the strongest new findings dig into where ADHD comes from, genes switched on in toddlerhood, and the back-and-forth between babies and parents, while the clinical world watches the clock on a novel drug awaiting an FDA verdict.

Genes that shape how busy a toddler is overlap with ADHD genes

An international team led by the University of Surrey scanned the DNA of nearly 80,000 infants and found that the genetic “dial” turning up a toddler’s activity level, centered on a gene called RHEBL1 that is active in the brain’s cortex, draws on many of the same variants tied to ADHD years later.

• Worth knowing because: Think of it as spotting the fingerprints of ADHD in behavior that shows up long before anyone would diagnose it, which could eventually help flag risk far earlier.

Primary: Nature Human Behaviour
Press Release: University of Surrey

A new non-stimulant shows added benefits, though the data is early and company-run

Centanafadine, which nudges three brain chemicals (dopamine, norepinephrine, serotonin) rather than the usual two, was linked to gains in adults’ executive function and emotional regulation, not just the core attention symptoms. Hold it loosely: these are post-hoc, exploratory analyses presented at a conference and announced by the maker, Otsuka, and they have not yet been peer-reviewed.

• Worth knowing because: Centanafadine is a low-abuse-potential non-stimulant, and the FDA is expected to rule around July 24.

Primary: Otsuka release, May 28, 2026 (post-hoc, exploratory, not peer-reviewed). Plain-English read: Psychiatric Times.

How fast a mom answers a baby’s babble may hint at later ADHD

Researchers replayed archived audio-video of 12-month-olds and their mothers and found that when a mother was slower to vocally “answer” her baby’s babbles, that child was more likely to be diagnosed with ADHD or a disruptive behavior disorder by age 7.

• Worth knowing because: The takeaway is not blame. It’s that the split-second rhythm of parent-child “conversation” could become an objective, very early screening signal.

Primary: PLOS ONE, July 1, 2026
Press Release: University of Glasgow

A large sibling study finds Tylenol in pregnancy does not raise ADHD risk

Using Hong Kong data that compared siblings, a design that cancels out shared family and genetic factors, researchers found no increased ADHD or autism risk from prenatal acetaminophen.

• Worth knowing because: Earlier alarms likely reflected the mother’s underlying health rather than the medication itself, a reassuring and timely counterweight to a debate that keeps resurfacing.

Primary: JAMA Internal Medicine, June 29, 2026
Plain-English read: HKUMed.

Microdosing psychedelics for ADHD: hype outruns the evidence

A Wroclaw Medical University review found only five qualifying studies and concluded the science is not there yet, promising as a research direction but not ready for the clinic. (Originally published in April and resurfaced in the press this week.)

• Worth knowing: given how much anecdotal enthusiasm circulates online.

Primary: Int. J. Mol. Sci., April 12, 2026
Plain-English read: Wroclaw Medical University

On the horizon

The FDA’s expected decision on centanafadine around July 24. If approved, it would add a genuinely new non-stimulant option to the ADHD toolkit, and next week’s coverage will likely start previewing what that means for patients.

A note on scope

New peer-reviewed ADHD research this specific week was moderate rather than blockbuster. The items above are the most substantive and best-sourced, with each linked to its primary journal or institutional release and the plain-English coverage offered as a secondary read. Two carry caveats: the centanafadine data is a manufacturer’s conference presentation, not yet peer-reviewed, and the microdosing review recirculated in the press this week but actually published in April.

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The research referenced in this article is intended for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider for diagnosis or treatment.