ADHD: A Plain-English Guide

Reading time: about 5 minutes. General education only, not medical advice.

What is it?

ADHD stands for attention-deficit/hyperactivity disorder. It is a difference in how the brain develops and works. It affects attention, activity levels and self-control. It starts in childhood, but for many people it carries on into adult life.

ADHD is not caused by bad parenting, laziness or too much sugar. Genes play a big part. People with ADHD often have real strengths, such as creativity, energy and the ability to focus deeply on things they love. With understanding and the right support, people with ADHD do well at school, at work and in life.

Doctors describe three main presentations:

  • mostly inattentive (trouble focusing and staying organised)
  • mostly hyperactive-impulsive (restless and acting quickly without thinking)
  • combined (both)

Common signs and experiences

Inattention:

  • losing focus or drifting off, especially on boring tasks
  • making careless mistakes
  • forgetting things and losing items
  • trouble organising tasks and time
  • not seeming to listen

Hyperactivity and impulsivity:

  • fidgeting or finding it hard to sit still
  • feeling restless inside (common in adults)
  • talking a lot or interrupting
  • acting without thinking about what might happen
  • trouble waiting your turn

Everyone does these things sometimes. In ADHD, they happen a lot, in more than one setting (like home and school), and cause real problems. Signs can look different in girls and women, who are more often inattentive and may be missed.

How it's diagnosed

A specialist, such as a psychiatrist, paediatrician or psychologist, does an assessment. They talk with the person, and often with parents, partners or teachers. They use checklists and look at how long signs have been present, which usually means since childhood. They also check for other things that can look like ADHD, such as sleep problems, anxiety or learning differences.

Usual treatments today

  • Medication. Stimulant medicines are the most common. They help many people focus and control impulses. Non-stimulant medicines are another option. Side effects can include poor appetite and trouble sleeping, so doctors check in regularly.
  • Behavioural support. Parent training, classroom support and behavioural therapy help children. Adults may benefit from CBT and coaching on time and organisation.
  • School and work changes. Things like extra time, breaks or a quieter space can make a big difference.

Many people use a mix of these.

Where metabolic health fits in

Metabolism is how the body turns food into energy. Mitochondria are tiny parts inside our cells that make most of that energy.

Researchers are looking at metabolism and ADHD for several reasons:

  • Studies have found links between ADHD and conditions such as obesity and type 2 diabetes in some people.
  • Some research suggests that the way the brain uses energy, and the chemical dopamine (which helps with focus and reward), may be connected.
  • Scientists are studying diet patterns, nutrients, the gut and mitochondria in ADHD.

So far, the results are mixed. Some studies of nutrients or special diets show small effects for some people, while others show none. Many studies are small or short. The ketogenic diet has mainly been studied in animals for ADHD, not in well-designed human trials.

This is emerging research, not established treatment, and it is not a cure. ADHD is a lifelong difference, not an illness to "fix." Diet changes should not replace proven support, and restrictive diets in children need a doctor and dietitian.

Safety first. Do not start a ketogenic or other therapeutic diet on your own. These diets can change how some medicines work, including mood stabilisers and diabetes medicines. They can cause side effects, and they may not be safe for everyone, for example during pregnancy or with some kidney, liver or eating problems. In studies, people were followed by doctors and dietitians.

When to get help

Talk to a doctor if attention, restlessness or impulsivity are causing problems at home, school or work. ADHD can come with low mood or anxiety. If you or someone you know is having thoughts of suicide, get help right away.

  • US: call or text 988 (Suicide & Crisis Lifeline), or chat at 988lifeline.org.
  • Emergency: call 911 or go to the nearest emergency room.
  • Outside the US: contact your local emergency number.

Research posts on this condition are coming soon.

Disclaimer

This page is for general education only. It is not medical advice, and it is not a diagnosis or treatment plan for anyone. We are not able to review anyone's situation. Metabolic psychiatry is a young field, and research summaries here may be incomplete or out of date, so please read the original sources. Always talk with your own doctor, psychiatrist or other qualified clinician before changing a diet, starting a supplement, or starting, stopping or changing any medication. Stopping psychiatric medication suddenly can be dangerous. Read the full disclaimer.

If you are in crisis in the US, call or text 988. For emergencies, call 911.

Sources