Not medical advice
Northsignal is for general education about ADHD and focus health. It does not diagnose, treat, or prescribe, and it is not a telehealth provider or affiliated with one. Talk to a licensed clinician about evaluation and treatment. Full disclaimer
The internet is full of confident statements about ADHD. We check each one against peer-reviewed research and clinical guidelines, then rate it. Full bars = strong evidence. Static = noise.
Decades of randomized trials and meta-analyses show large effect sizes for methylphenidate and amphetamine-class medications in reducing core symptoms — under clinical supervision and with individual monitoring.
Read the breakdown → Cortese et al., 2018 · NICE NG87
No short online quiz or viral checklist can diagnose ADHD. Screeners like the ASRS can suggest whether a full evaluation is worth pursuing — diagnosis requires a licensed clinician and a structured clinical assessment.
Why it spreads anyway → Read the article
Twin studies consistently estimate heritability around 70–80%, among the highest of any psychiatric condition. Environment plays a role, but "bad parenting" does not cause ADHD.
The evidence → Faraone & Larsson, 2019
Controlled studies, including blinded designs where parents didn't know whether children had sugar, find no meaningful effect of sugar on ADHD symptoms. Expectation effects explain most of the perceived link.
The classic study → Wolraich et al., 1995
Meta-analyses find a small but measurable benefit — much smaller than medication. Reasonable to discuss with a clinician as an add-on, not a replacement for treatment.
The numbers → Bloch & Qawasmi, 2011
Diagnostic criteria require several symptoms before age 12. Many adults were never assessed as children, so "adult diagnosis" usually means late recognition, not late onset.
Full guide → Adult evaluation, explained
ADHD is recognized by every major medical body, described in the literature for over a century, with consistent findings across genetics, imaging, and long-term outcome studies worldwide — including countries with very low prescribing rates.
The consensus → World Federation of ADHD, 2021
Small studies and pilot trials suggest benefits for planning and goal completion, but the research base is thin, unstandardized, and rarely controlled. Promising — not yet proven.
What we know → Coaching, fact-checked
Large registry studies find that during medicated periods, people with ADHD have significantly fewer transport accidents, emergency visits, and injuries compared with unmedicated periods.
The data → Chang et al., 2017
Everyone gets distracted; that's not ADHD. Diagnosis requires persistent symptoms from childhood, across multiple settings, causing real impairment. Casual use of the label makes it harder for people who need evaluation to be taken seriously.
Trait vs disorder → Read the article
Trials show modest short-term improvements in attention and executive function after exercise. Real, worth doing for many reasons — but not a substitute for evaluation or treatment.
The evidence → Focus hacks, fact-checked
No supplement has shown effects approaching first-line treatments in controlled trials. Some (like omega-3s) show small benefits; "just as effective" claims are marketing, not evidence.
Supplement claims, checked → Read the article
Send us the viral post, the supplement ad, the confident tweet. We’ll run it against the research and add it to the library.
Every verdict links to its sources. Ratings reflect the strength of the evidence — not whether something works for a specific person. That’s a conversation for you and a licensed clinician.
Supported by meta-analyses, large randomized trials, or major clinical guidelines (NICE, AAP, DSM-5-TR).
Weak signalSome supportive studies, but small, short, or inconsistent. Promising — treat with informed caution.
NoiseContradicted by controlled research, misrepresents how diagnosis works, or claims far beyond what any study shows.
