Food and regular meals

Being hungry makes you more irritable, and eating more fruit and vegetables goes with better wellbeing. The effects are modest. For the full picture, go to eatgood.now.

• Evidence: Some
• Takes: three meals a day

Why it matters

Hunger changes your mood. In a 21-day study, 64 adults in Central Europe rated their hunger and feelings five times a day. When they were hungrier, they felt more angry and irritable and got less pleasure out of things [1]. So “hangry” is a real pattern, not just a joke.

Hunger seems to make things feel worse mainly when something else is already annoying. In lab experiments, hungry people judged things more negatively in a negative situation, but not in a neutral or pleasant one. They were also harder on a researcher, but only when they weren’t paying attention to their own feelings [2]. Noticing “I’m hungry” may take some of the edge off.

Fruit and vegetables. In a two-week trial, 171 young adults who usually ate few fruit and vegetables were given two extra servings a day. They reported more energy, motivation and sense of flourishing than the other groups. Their day-to-day mood didn’t change. Text reminders and a voucher didn’t have the same effect [3]. In a study following over 12,000 Australian adults, people who started eating more fruit and vegetables became happier and more satisfied with life within two years [4].

But keep it in proportion. A meta-analysis of 16 trials found that improving diet lowered low-mood scores by a small amount and made no difference to anxiety [5].

How to do it

1. Eat at roughly regular times. Three meals, or whatever pattern suits you, so you aren’t going long stretches with nothing.
2. Plan for the danger zones. Long meetings, late afternoons, the commute home. Keep a piece of fruit or some nuts in your bag.
3. Add fruit and vegetables before cutting anything. One extra portion at lunch and one at dinner is a realistic start. Make them easy: fruit on the desk, frozen vegetables in the freezer.
4. Notice hunger before acting on irritation. If you’re snapping at people at 5 pm, eat something before the difficult conversation.
5. For meal plans and nutrition, use eatgood.now.

Common mistakes

• Skipping meals when busy, then arriving at the evening tired, hungry and short-tempered.
• Expecting a diet to transform your mood. The effects are real but small. Sleep, movement and people usually matter more.
• Strict rules. A plan you drop after a week does less than a small change you keep.
• Making big decisions while hungry. Wait until you’ve eaten if you can.

Evidence

Rated Some. The hunger findings come from one experience-sampling study [1] and a set of lab experiments [2]. They agree, but the samples were small. The fruit and vegetable trial was short and done with 18- to 25-year-olds in New Zealand [3], and the Australian study shows a link over time, not proof of cause [4]. Trials of diet changes show small effects on mood [5]. Overall, eating regularly and well is sensible and helps a little, but the evidence for healthy adults is modest.

Topics: Food, Meals, Hunger, Fruit and Vegetables, Mood, Foundations

Sources checked 4 October 2026. Spot a mistake? Tell us.