By Funda Bachini, MD, and Kanisha Twitty, MS, RDN, Phoenix Children’s
What we feed our kids does more than fuel their bodies. From a baby’s first bites to a teen’s late-night snacks, food plays a powerful role in brain development, mood, focus and emotional resilience.
As we enter April, Global Child Nutrition Month, it’s a good time to look at how smart food choices support mental wellness at every stage of childhood.
Nutrition in Infancy
During infancy, the brain develops at an extraordinary pace and nutrition provides the building blocks for that growth. Consistent, balanced nutrition supports cognitive development, emotional regulation and even sleep patterns.
In the first year of life, babies receive omega-3 fatty acids like DHA through breast milk or fortified formula. These nutrients are important for early brain development and have been linked to emotional regulation and a lower risk of anxiety and mood challenges later in life.
Supporting Mood and Focus in Young Children
As children grow, multiple nutrients play a key role in supporting their mental health. Iron supports focus and learning, omega-3 fatty acids aid ongoing brain growth and B vitamins support energy and mood. Protein helps the brain manage stress and emotions, while vitamin D contributes to mood-related brain chemicals like serotonin.
Research suggests diets high in ultra-processed foods, added sugars and saturated fats may be associated with higher rates of anxiety and depressive symptoms. In contrast, balanced meals that include fruits, vegetables, protein, healthy fats and fiber help promote steadier energy and more stable moods throughout the day.
Young children are very sensitive to changes in blood sugar. Diets high in added sugars and refined carbohydrates can lead to rapid spikes and crashes, which may show up as irritability, tantrums or difficulty focusing.
Regular meal and snack times also provide predictability, helping children tune into hunger and fullness cues while supporting emotional balance. Pairing a balanced diet with structure helps with blood sugar control, hormone production and a regulated circadian rhythm — all contributors to overall health and mental well-being.
Fueling Learning in School-Aged Children
For school-aged kids, nutrition directly affects attention, memory and emotional stamina. Skipping meals, especially breakfast, can make it harder to concentrate, regulate emotions and stay engaged in the classroom.
Be aware of the roles and dynamics of family meals. Decide what, when and where food is served, and allow the child to decide if they eat and how much. It is not recommended to force a child to eat or use food as a reward or punishment for behavior. Using non-food rewards and positive reinforcement supports a healthier, more balanced relationship with food and emotions.
When food, particularly sweets or highly processed snacks, is consistently used as a reward, children may begin to associate eating with comfort, achievement or emotional relief rather than hunger and nourishment. Over time, this can make it harder for children to recognize when they’re hungry or full and may contribute to habits like eating in response to emotion rather than physical needs later in life.
Nutrition as a Protective Factor for Teen Mental Health
Teen brains are still developing, particularly the areas responsible for decision-making and emotional regulation.
During this time, teens often experience irregular eating schedules, increased autonomy over food choices, greater reliance on convenience foods and heightened exposure to body image pressures and dieting behaviors.
These factors can create nutritional gaps that affect mood stability, stress tolerance, sleep and energy levels. Providing teens with accessible, balanced food options can be a quiet but powerful protective factor during this critical stage of development.
Caffeine deserves special attention. High caffeine intake can worsen anxiety, disrupt sleep and increase irritability — all of which affect mental health. Energy drinks often combine large amounts of caffeine with added sugar, increasing the likelihood of mood swings and energy crashes. Poor sleep linked to caffeine use can further impact emotional regulation and academic performance. Encouraging moderation and healthier alternatives is important for teen wellness.
Supporting Mental Health Starts at the Table
Families do not need to make major changes all at once. Small, realistic steps make a meaningful difference. This can look like adding protein to snack time, offering consistent fruits and vegetables and prioritizing regular family meals when possible.
Involving children and teens in grocery shopping or meal planning can increase openness to new foods. Avoiding “good” or “bad” food labels can help foster a healthy relationship with eating that is not tied to guilt or diet culture. Providing a variety of foods while allowing treats in moderation can not only bring joy in the moment but also increase confidence and bodily awareness.
When to See Your Pediatrician
If a child shows ongoing changes in mood, behavior, sleep or appetite, it is worth discussing with a pediatrician. Nutrition is one piece of a larger mental health picture, and early conversations can help identify supportive strategies or appropriate referrals. Pediatricians can connect families with mental health professionals, dietitians and other specialists to better understand the full range of factors, from nutrition to stress and development, that may influence a child’s well-being.
Funda Bachini, MD, is the division chief of psychiatry at Phoenix Children’s. Kanisha Twitty, MS, RDN, is a registered dietitian at Phoenix Children’s. For more information, visit www.phoenixchildrens.org
