In short. Many people have no diagnosis, yet recognise certain traits in themselves: distraction, impulsivity, anxiety, low mood. Research shows that these traits, even without a diagnosis, go together more often with difficulties around food and a higher weight. Working on eating does not require a label. Understanding where those traits come from does require a specialist.
Does this sound familiar?
- You start a diet with enthusiasm and forget about it a few days later.
- You open the fridge “just to look” and end up eating standing up.
- When you feel low, stopping in front of food becomes very hard.
- You’ve read about ADHD or anxiety online and wondered: “what if it’s me?”
This article is not meant to diagnose or to confirm a self-diagnosis. It explains what studies have observed and what can be done, meanwhile, at the table.
Traits and diagnosis: what’s the difference
Attention, impulsivity, anxiety and mood vary from person to person, like height. A diagnosis comes when these aspects cross a threshold and cause significant difficulties. Many recent studies measure traits on a continuous scale, including people without a diagnosis. This is how researchers found that eating changes already below the threshold.
What studies have observed
King’s College London and the twin study (2026). Comparing identical and non-identical twins shows how much is inherited and how much comes from the environment. In a study published in Psychological Medicine, following thousands of twin pairs into adulthood, stronger traits of inattention and impulsivity went together with more frequent difficulty stopping eating and a higher weight. Much of this link was explained by shared inherited characteristics: behind the struggle there is some biology, which the plan should take into account.
Leipzig, mood below the threshold (2026). Researchers at Leipzig University studied 77 adults with no diagnosed depression or eating disorder. Lower mood still went together with a higher weight, partly through greater difficulty stopping in front of food. The study is small and a single snapshot, but it points in the same direction as the others.
Harvard and the “few signs” (2014). In the study of more than 50,000 women, even those with few signs of a difficult time, below the diagnostic threshold, had a higher risk of gaining weight. More in the article on trauma, stress and weight.
A review of over one million adults (2025). Gathering 31 studies of adults with obesity, a review in Nutrients found ADHD much more frequent in this group: in one included study it affected 20.6% of people with obesity versus 6.8% without. For this reason, the Canadian obesity guidelines recommend always assessing these aspects in people seeking help with weight.
Which comes first, the trait or the weight?
Probably each feeds the other. Difficulty organising and stopping makes weight gain easier. Weight, failed diets and guilt in turn weigh on mood. Most studies are a single snapshot, so the exact direction remains unclear. What matters most is that the cycle can be broken from either side.
Why self-diagnosis is not enough
Distraction, tiredness and poor concentration can have many causes: poor sleep, nutritional deficiencies, thyroid problems, stress, heavy life periods. If you recognise yourself in these traits, the right step is to talk to your doctor, who can refer you to the right specialist. Meanwhile, work on eating can already begin.
How I approach it
The nutrition plan I build is orthodox, based on established guidance. What changes is how it is made applicable. The Gasparri Method™ uses Six Sigma in an applied way, to remove obstacles between the plan and real life:
- Finding breaking points: forgetting, opening the fridge out of boredom, the evening after a tiring day.
- Fewer decisions: a few simple repeatable meals, shopping planned, alternatives already set.
- Letting tools do the remembering: the Interactive Plan and the Diet Band™.
- Codified phases and short goals, close and visible.
- Collaboration with the specialist, when the person chooses to explore the cause.
If you have an ADHD diagnosis, see Adult ADHD and Diet and Adult ADHD and Overweight. This is part of the complex cases I follow.
Interested in this topic? On Monday 16 November the next article in the series comes out: Stress, Anxiety and Low Mood: Why Food Cravings Grow and How to Manage Them. Follow me on social media or subscribe below to get it by email.
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Frequently asked questions
Can I have ADHD-related eating difficulties without a diagnosis? Studies show that inattention and impulsivity traits, even below the diagnostic threshold, go together more often with eating difficulties and a higher weight. Only a specialist can assess whether it is ADHD or something else.
Do I need a diagnosis to start an eating plan? No. The plan is built on the person’s real difficulties, with or without a diagnosis.
Can a nutritionist tell me if I have ADHD or anxiety? No. Assessment belongs to doctors and specialists. The nutritionist works on eating and, if important signs appear, suggests looking into them.
About the author
Dr. Giulia Gasparri, Ph.D., registered nutritionist, Italian National Order of Biologists (Section A, no. ToU_A3124), Ph.D. in molecular biology, Six Sigma Green Belt. In Foligno and online worldwide.
Sources
- You Y et al. ADHD, binge eating and BMI: a twin study, Psychological Medicine, 2026 — link
- Schamarek I et al. Trait disinhibition, depressive symptoms and BMI in a non-clinical cohort, Frontiers in Psychology, 2026 — link
- Kubzansky LD et al. The Weight of Traumatic Stress, JAMA Psychiatry, 2014 — link
- Autism, ADHD, and Their Traits in Adults with Obesity: A Scoping Review, Nutrients, 2025 — link
- Taylor VH et al. Canadian Adult Obesity CPG: The Role of Mental Health — link
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