Often overlooked in the nutrition conversation are micronutrients — essential vitamins and minerals — required by the body in small amounts but critical for children’s optimal physical and cognitive development

ANDREW JOHN

In most middle-class households, conversations about child nutrition tend to revolve around foods rich in protein and vitamins — the most visible pillars of a “healthy” diet. Often overlooked in the nutrition conversation are micronutrients — essential vitamins and minerals — required by the body in small amounts but critical for a child’s optimal physical and cognitive development. This blind spot in everyday meal planning means that seemingly balanced diets fall short of micronutrients. The most critical micronutrients include iron, zinc, magnesium, potassium and calcium.

“Micronutrients are essential vitamins and minerals required by the body in small quantities to regulate physiological functions, enable enzyme production, and support physical and cognitive growth. For example, iron is essential for haemoglobin formation and oxygen supply to the brain and body, while zinc boosts immunity and healing. Unfortunately, most parents tend to focus more on proteins and vitamins and fail to include micronutrients in children’s everyday diets. As a result, iron, zinc and calcium deficiencies are increasingly being reported in children,” says Sneha Arora, a Bengaluru-based sports nutritionist and fitness trainer.

Here is a guide to 5 essential micronutrients that parents must include in children’s daily diets to enable optimal physical and cognitive development.

Iron

Iron is an essential micronutrient that supports children’s balanced physical growth and brain development. It plays an active role in producing haemoglobin, the protein in red blood cells that carries oxygen throughout the body. Children deficient in iron develop anemia, leading to fatigue, weakness, and loss of focus. This adversely affects children’s learning and physical activity. Iron also supports immunity, helping children fight infections. Rapid growth phases — especially in infants, toddlers, and adolescents — increase iron needs.

Good dietary sources of iron include mutton, chicken, fish, eggs, and plant-based options such as lentils, beans, spinach, and iron-fortified cereals. Pairing plant-based iron with vitamin C-rich foods (oranges, tofu, strawberries, kiwi, and tomatoes) improves absorption. Ensuring adequate iron intake enables children to become energetic, focused, and healthy, with improved muscle function, cognitive health, and sleep quality.

Calcium

Calcium is a vital micronutrient for developing children’s bones and teeth. During childhood and adolescence, the body is actively forming bone mass, and adequate calcium intake ensures that bones attain their full strength. It also reduces the risk of fractures during childhood and osteoporosis later in life. Moreover, it plays an important role in improving muscle function, nerve signalling, maintaining a healthy heartbeat and preventing excessive bleeding by assisting blood coagulation.

Dairy products such as milk, yogurt, and cheese are the richest sources of calcium. Non-dairy options include fortified plant-based milk, tofu, almonds, sesame seeds, and leafy greens like kale and broccoli. Vitamin D also helps the body absorb calcium effectively. So adequate intake of both micronutrients is important. Vitamin D can be absorbed through sunlight, dairy products, supplements, nuts, and seeds.

Magnesium

Magnesium is a vital micronutrient that supports children’s enzyme production, energy generation and metabolism. It aids muscle and heart function and regulates nerve signals, which are critical for physical movement, coordination, and proper brain function. Magnesium also boosts energy production, ensuring children remain active and alert throughout the day. Another key benefit is its role in bone development — about 60 percent of the body’s magnesium is stored in bones, where it works alongside calcium to strengthen the body’s skeletal structure. Additionally, it supports healthy sleep, regulates mood and reduces cortisol (a stress hormone).

Dietary sources rich in magnesium include whole grains, nuts (almonds and cashews), seeds, legumes, leafy green vegetables such as spinach, and foods like bananas and dark chocolate (in moderation).

Zinc

Zinc is a key micronutrient that boosts children’s growth, immunity, and wound healing by activating cell growth and collagen synthesis. It drives cell division and protein synthesis, processes essential for proper physical development. Zinc also prompts healthy immune response, helping children resist infections such as colds and flu. Moreover, it is important for taste and appetite regulation as it produces gustin, a protein essential for the regeneration of taste buds, which influences overall nutrition and eating habits. Zinc deficiency leads to slowed growth, weakened immunity, and reduced appetite.

Good dietary sources of zinc include meat, poultry, seafood, dairy products, whole grains, beans, nuts, and seeds. Include a mix of these foods in your children’s daily meals to ensure their overall wellbeing.

Potassium

Potassium is an essential mineral that regulates fluid balance by controlling water movement across cells, maintaining osmotic equilibrium, and supporting nerve function and muscle activity in children. Regulation of fluids inside and outside cells maintains healthy blood pressure and overall cellular function. Potassium is especially important for muscle contractions, including the heartbeat, ensuring the heart functions normally and efficiently. It also supports nerve signaling, allowing the brain and body to communicate effectively, which is vital for physical movement, reflexes, and coordination. In growing children, potassium intake boosts muscle growth and reduces the risk of cramps and fatigue. It also prevents diabetes by stabilizing blood sugar and reduces anxiety and stress by regulating hormones and reducing cortisol (the stress hormone). Potassium deficiency leads to physical weakness, irregular heartbeat, and muscle problems.

Foods rich in potassium include bananas, oranges, potatoes, spinach, tomatoes, beans, yogurt, and coconut water.