Eat healthy foods, eat good foods, eat foods with a variety of nutrients. That is the starting point I want to keep. In adult ADHD, nourishment can be overlooked while we concentrate on attention and medication. A person may spend hours absorbed in work, notice hunger late and then eat whatever is available. Before discussing an ideal diet, I want to know what is actually being eaten, at what point in the day, and how much effort it takes to make a meal happen.
Eating contains a long sequence of activities. We have to recognise hunger, stop what we are doing, remember what food is available, choose something, prepare it and sit down to eat. Shopping and cleaning happen around that sequence. Sensory preferences, money, work hours, medication effects and living alone can change every part of it. A person may understand nutrition very well and still have an eating routine that does not nourish them adequately. Clinical attention to that gap is essential.
I encourage less reliance on added sugars and excess saturated fats, and more variety from ordinary foods. Vegetables, fruit, legumes, wholegrains, protein foods and healthy fats each contribute something. The pattern over the day matters. Don't separate everything out into a single nutrient target. A protein shake may serve a purpose, but it cannot tell us whether the person is eating enough overall, getting fibre, enjoying meals or repeatedly going through the day without food.
Food processing deserves serious consideration too. Controlled adult trials have shown that different food patterns can change energy intake and weight. A 2025 study compared two diets that both followed healthy eating guidance and found greater weight loss with the minimally processed pattern. For clinical practice, I also notice how the study made eating possible: food was prepared, supplied free and delivered to participants' homes. That is a substantial change in the conditions around the meal. Advice should pay equally close attention to preparation and access.
Convenience can help build a nourishing routine. Frozen vegetables, tinned beans, yoghurt, ready-cooked grains and a prepared meal can reduce the number of steps between hunger and eating. I would rather examine how these foods fit together than turn shopping into another test the person is supposed to pass. A few reliable meals may be more useful than an elaborate plan. Keep their ingredients available, and consider where a meal or snack needs to be when a busy day makes stopping difficult.
Traditional food practices can offer familiar, satisfying ways to prepare a meal. Cooking may make some foods easier to digest and some nutrients more available, depending on the food and method. Seasonal, culturally familiar and organic foods can belong in the plan where they are accessible. Cost, equipment, time and tolerance belong there too. The question is whether the meal supports the person and can be made again. A food preference becomes useful when it helps build that continuity.
Stress and eating also need an individual account. Some people eat more when distressed, some lose their appetite, and some delay eating until the day's demands ease. A recent study repeatedly observed adults with diagnosed ADHD across their days and did not find an overall relationship between stress and food intake. I take that as a reason to ask what happens for the person in front of me. What changes under pressure? What food is available then? What do they notice about appetite, timing and the evening afterwards?
The gut belongs in this conversation because eating is a bodily process, with effects on digestion and the microbes living there. We can support it through a varied pattern that is tolerated and sustainable. If appetite, medication effects, persistent gut symptoms or a very limited food range are making nourishment difficult, deepen the assessment and involve appropriate support. Start with one dependable meal, or one point in the day where food regularly disappears. Build the conditions that make eating possible, and review what actually happens.