The Truth About ADHD in Adults: Harvard’s Dr. Chris Palmer Explains the Research

KEYPOINTS

• 01

  How ADHD is diagnosed

  Dr. Palmer, a psychiatrist who has spent almost 30 years at Harvard's McLean Hospital, explains that symptoms must begin before age 12, even if nobody noticed them then, and must last at least six months. They fall into two groups: inattention, and hyperactivity or impulsivity.

• 02

  Girls are more often missed

  Hyperactive, impulsive kids, more often boys, are obvious: blurting out answers, fidgeting, treated as discipline problems, so they get diagnosed. The primarily inattentive type, which tends to be more common in girls, shows up as trouble focusing on tests or remembering what was just read. These kids have to work harder and are often wrongly seen as 'not so bright.'

• 03

  It's a disorder on paper, but can also be an adaptive trait

  ADHD is listed in the DSM-5, but Palmer says it can also be seen as neurodiversity. Explorers, innovators and energetic, motivated people are essential to a tribe's survival. The problem comes when you put them in a classroom and ask them to sit still and read for five hours.

• 04

  Underactive 'conductor' regions in the brain

  Regions for focus and concentration, especially the frontal lobes and the striatum, tend to be underactive. There's no brain scan that can diagnose ADHD, and presentations vary widely. Palmer says the over- and underactivity seen on scans is really about brain metabolism: blood flow that brings food and oxygen so cells can make energy.

• 05

  Comorbidity is the norm

  About 50% of Americans with one DSM diagnosis have more than one, and people who seek treatment average three to four. ADHD often comes with dyslexia, anxiety, depression or bipolar disorder. Among autistic people, about 50% have ADHD and many have seizures, depression or anxiety.

• 06

  Stimulants are a metabolic intervention

  Medications like Adderall and Concerta raise dopamine, which boosts metabolism in the underactive conductor regions. Palmer isn't against them: if a stimulant works for you, keep taking it. But understanding them this way opens other options, which matters because some people crash in the evening, sleep poorly or lose their appetite, and all of that further disrupts brain metabolism.

• 07

  Try lifestyle changes before or alongside medication

  Therapy, behavioural interventions, cognitive behavioural therapy and medication all stay on the table. Before reaching for pills, Palmer would do a common-sense check: is the person eating mostly processed food, getting enough vitamins, minerals and protein, sleeping, and how much screen time are they getting? Mel notes she's never had a clinician ask first what she eats or how much she exercises.

• 08

  A two-week elimination diet to test for food sensitivities

  Palmer points to growing research on the two-way gut-brain connection. For example, gluten in a sensitive person can inflame the gut and affect the brain, which may show up as ADHD symptoms, anxiety or low mood. Cut common culprits like gluten, dairy, soy, sugar and artificial dyes and sweeteners (a Whole30-style plan covers many) for about two weeks. If you improve dramatically, add foods back one at a time to find the least restrictive diet that works.

• 09

  Or simply eat more protein, fewer carbs and more whole food for a month

  Mel's summary: 'chicken cutlets, not chicken nuggets.' Give it at least a month, and if it makes no difference, stop. Palmer says he isn't asking for sacrifices with no clear return.

• 10

  Build muscle, do zone 2 cardio, cut substances

  More muscle means better metabolic health, and a little tone goes a long way. Zone 2 is 30 to 60 minutes at a pace where you can still talk: hiking, cycling, swimming. Reduce alcohol, marijuana, smoking and vaping. Palmer also flags psychiatric drugs that cause weight gain as potentially working against you long term.