Omega-3: Superpower for Your Child’s Brain and Eyes

The first 1,000 days – a critical period of development

The period from conception to around a child’s second birthday is crucial for brain and immune system development. During this time, neural connections form, laying the foundation for learning and lifelong health. This is why the concept of the first 1,000 days as a “window of opportunity” has emerged, supported by extensive scientific evidence. Research shows that early interventions can bring substantial benefits for both individual children and society as a whole.

You may have already read my previous post on the important role of DHA during pregnancy for your baby’s brain health. Its significance, however, does not end with pregnancy – DHA remains particularly important during breastfeeding and ongoing child development.

What are DHA and ARA and why are they important?

Docosahexaenoic acid (DHA) and arachidonic acid (ARA) are polyunsaturated fatty acids naturally present in breast milk and, more recently, added to infant formula. DHA is mainly found in fish, while ARA is an omega-6 fatty acid found primarily in animal products.

ARA can be found in:

• Meat
• Offal (highest concentration)
• Fish
• Dairy products
• Eggs

During the first year of life, both DHA and ARA accumulate intensively in an infant’s brain. Ensuring an adequate supply is therefore essential. Moreover, breast milk typically has a more favorable fatty acid profile than formula, further supporting brain development.

DHA may protect preterm infants’ lungs

Bronchopulmonary dysplasia (BPD) is a serious issue in very preterm infants. Although survival rates have improved over the past 20 years, the incidence of BPD has not decreased, prompting ongoing research into ways to protect these vulnerable lungs.

One potential solution is DHA. Studies in both animals and humans have suggested that this fatty acid may support lung development and reduce the risk of chronic respiratory diseases.

To investigate this, a large randomized clinical trial was conducted with 1,244 preterm infants (622 in each group). Children were randomly assigned to two groups:

• Control group – received an identical emulsion without DHA
• DHA group – received an emulsion with 60 mg/kg/day of DHA

Results showed that DHA supplementation may reduce respiratory problems in very preterm infants.

Why maternal DHA levels are often low

Researchers note that DHA levels, crucial for the child’s nervous system development, are often insufficient. Why is this?

In the early 2000s, the U.S. Food and Drug Administration (FDA) recommended that pregnant and breastfeeding women limit fish intake due to potential methylmercury exposure. As a result, many women significantly reduced their fish consumption.

Eight years later, these recommendations were revised. The FDA began recommending that breastfeeding women consume at least 200 mg of DHA daily. Recent research suggests that around 1,000 mg per day may be even more beneficial for the child’s development in utero.

More DHA in the mother’s diet = more DHA in breast milk

DHA levels in breast milk largely depend on the mother’s diet – the more DHA she consumes, the more is passed into the milk.

For example, a study in South Dakota analyzed the milk of breastfeeding women. Initially, most had low DHA levels. Half of the participants were then advised to increase intake of DHA-rich foods or take supplements.

At the second measurement, DHA levels in milk had significantly increased among women who changed their diet, while they remained similar in those who did not.

A similar study in Brazil showed that higher omega-3 levels in breast milk were associated with lower levels of harmful trans fats.

What happens with omega-3 deficiency?

Omega-3 deficiency can reduce DHA levels in the brain and increase the proportion of omega-6 fatty acids. Animal studies show that low DHA in the developing brain can lead to:

• Impaired neuron formation
• Changes in neurotransmitter metabolism
• Learning difficulties
• Vision problems

Similar associations are observed in humans. Low maternal DHA levels may be linked to a higher risk of developmental problems in the child, while improving maternal DHA intake reduces the risk of visual and neurological issues in infants.

Effects of omega-3 supplementation on children under 4

The first 1,000 days (roughly the first 3 years) are critical for shaping a child’s future health and cognitive abilities. During this period, the brain rapidly forms new neural connections that will serve as the foundation for lifelong learning and health. The immune system also matures, making proper nutrition and emotional support crucial.

A study in Guinea-Bissau with over 1,000 children tested three interventions over five months:

• Standard breakfast
• Fortified mixture
• Omega-3 supplement

Omega-3 supplementation produced the best results in children under 4, including:

• Improved memory
• Increased hemoglobin levels in children with anemia
• Better body composition (more muscle, less fat)
• Improved cerebral blood flow

In older children, the effects were much weaker, indicating that the greatest benefits occur in early childhood.

Effects of an omega-3-rich diet on children’s vision and brain

An omega-3-rich diet supports not only brain health but also vision, particularly in children with ADHD or lower IQ. In one study of 179 children, participants were divided into two groups: one consumed regular eggs, the other eggs enriched with omega-3 for 3 months. Visual acuity was measured before and after the study.

Children who ate omega-3-rich eggs showed significantly better vision and a healthier fatty acid profile in red blood cells. Eggs are also an excellent source of choline, which supports brain function and eye health.

Interestingly, choline and omega-3 work synergistically, enhancing each other’s effects on vision and brain function.

Omega-3 and ADHD symptoms

Children and adolescents with ADHD often have low omega-3 levels. Studies indicate that supplementation can improve ADHD symptoms and concentration. Higher omega-3, especially DHA, supports reading ability and behavior, with the most noticeable benefits in children struggling academically.

In one study of 90 Australian children with severe ADHD symptoms, DHA supplementation improved reading performance and reduced rebellious behaviors. Among 17 children with learning difficulties, increased DHA in red blood cells was associated with:

• Better reading and writing
• Improved divided attention
• Reduced hyperactivity and irritability
• Overall improvement in ADHD symptoms

Omega-3 and adolescent mental health

Mental health disorders such as bipolar disorder, schizophrenia, and other conditions are increasingly observed in young people. Studies show that omega-3 supplementation combined with vitamin D can improve cognitive function and behavior in affected individuals.

In children with ADHD, higher DHA levels supported reading, behavior, and attention, particularly in those with learning difficulties.

Summary

Scientific evidence shows that omega-3 fatty acids play a key role in children’s development and functioning, especially in those with ADHD or learning difficulties.

Key benefits include:

• Supporting brain and nervous system development
• Improving visual acuity
• Optimizing red blood cell fatty acid profile
• Reducing ADHD symptoms
• Supporting concentration and focus
• Decreasing hyperactivity and irritability
• Supporting behavior and reducing rebellious behavior
• Improving cognitive abilities
• Enhancing reading and writing skills
• Improving divided attention
• Supporting mental health in young people
• In combination with vitamin D, enhancing cognition and behavior in mental health conditions
• Working synergistically with choline to support brain and eye development

Therefore, it is important to include omega-3-rich foods in children’s diets, such as fatty fish, omega-3-enriched eggs, and other sources of these essential fatty acids.

If this topic resonates with you, I’d love to hear your thoughts. Does your child eat omega-3-rich foods? Have you noticed any difference after introducing them? Share your experience in the comments – your story may help other parents.