Can omega-3 fatty acids help kids with autism? The science says YES

04/17/2025 / By Olivia Cook

Omega-3 fatty acids are crucial for brain health, supporting development, memory and mood.
A study published in Pediatric Endocrinology, Diabetes and Metabolism found that omega-3 supplementation improved repetitive behaviors and social communication in children with ASD.
Omega-3s may reduce brain inflammation and support neurotransmitter function – both of which are key in autism management.
Natural sources of omega-3s include fatty fish, flaxseeds, walnuts and chia seeds; supplements like fish oil and krill oil are also beneficial.
Ensuring adequate omega-3 intake from pregnancy through adulthood may support lifelong cognitive and emotional well-being.

For years, parents and researchers alike have been searching for ways to improve the lives of children with Autism Spectrum Disorder (ASD). From behavioral therapies to dietary changes, many strategies have been explored. But what if something as simple as fish oil could make a difference?

Emerging research, including a study published in Pediatric Endocrinology, Diabetes and Metabolism suggests that omega-3 fatty acids may offer promising benefits for children with autism – and even for brain health throughout life.

The brain and omega-3: A vital connection

The human brain is made up of about 60 percent fat. Omega-3 fatty acids play a crucial role in keeping brain cells flexible, healthy and well-connected. Think of omega-3s as the “good grease” that keeps the brain’s gears running smoothly. These essential fatty acids – docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) – must come from food or supplements because the body doesn’t produce them naturally.

Omega-3s are essential for brain development, memory and mood regulation. Studies have linked omega-3 intake to improvements in conditions like ADHD (attention deficit hyperactivity disorder), Alzheimer’s disease and depression. But what about autism?

Omega-3 and autism: What the science says

A 2021 study explored how omega-3 supplements impact children with ASD. The researchers studied 54 children, dividing them into two groups: One received daily omega-3 supplements (1,000 mg per day) while the other received a placebo (a “fake” treatment like a sugar pill used to compare against the “real” thing). Over eight weeks, the children’s behaviors were assessed using a well-known autism rating scale – GARS-2 (Gillian Autism Scale – second edition) – which measures interactions, repetitive behaviors and social communication.

The results were compelling. Children who took omega-3 supplements showed significant improvements in overall autism severity scores, repetitive behaviors (such as hand-flapping or rocking) and social communication (expressing emotions and engaging with others).

While the study did not find major changes in social interactions, the improvements in other key areas suggest that omega-3s could be a simple and safe way to help manage some symptoms of autism.

How omega-3s support brain function

Reducing inflammation: Many children with ASD have higher levels of brain inflammation and omega-3s are natural inflammatory agents.
Regulating neurotransmitters: These fatty acids may impact serotonin and dopamine, which influence mood, attention and behavior.
Supporting brain cell communication: Omega-3s contribute to healthy brain cell membranes, improving how neurons communicate.

The gut-brain connection

An increasing body of research highlights the strong link between gut health and brain function, known as the gut-brain axis. Many children with ASD experience digestive issues and omega-3s may help by reducing gut inflammation and improving microbiome (gut bacteria) balance. Since the gut and brain constantly communicate through chemical and nerve pathways, better gut health may lead to better cognitive and behavioral outcomes. (Related: The gut-brain connection: Study suggests the gut microbiome could be key to solving the autism puzzle.)

How to get more omega-3s

If you’re looking to boost omega-3 intake, consider these natural sources: fatty fish (e.g., anchovies, herring, mackerel, salmon and sardines), flaxseeds (ground is best for absorption), chia seeds (great in smoothies or yogurt), walnuts or algae-based supplements (a plant-based omega-3 source).

For children who are picky eaters, high-quality fish oil or krill oil supplements are excellent options. However, it is crucial to read the ingredients carefully when choosing a supplement. Some flavored versions contain additives that might trigger adverse reactions in children with sensitivities. The best option is a pure, minimally processed supplement without unnecessary ingredients.

The right dosage depends on age and individual needs but general recommendations for children are as follows:

1 to 3 years old: 700 mg per day
4 to 8 years old: 900 mg per day
9 to 13 years old: 1,000 to 1,200 mg per day

Always consult your trusted pediatrician before starting a new supplement to ensure proper dosing and safety. (Related: Healthy levels of omega-3 fatty acids improve children’s attentiveness, cognitive function.)

A lifelong brain-boosting strategy

While omega-3s are not a cure for autism, the growing body of research suggests that proper nutrition plays a role in brain health and development. From pregnancy to old age, getting enough omega-3s supports cognitive function, reduces inflammation and helps maintain emotional well-being. (Related: Low omega-3s in children causes difficulties in reading, learning.)

For parents exploring ways to support their children’s development, adding omega-3-rich foods or supplements could be a simple yet powerful strategy. As science continues to uncover the links between diet and brain function, one thing remains clear: What a person eats profoundly impacts how his brain works, and omega-3s are one of the best allies for lifelong cognitive health and function.

Watch this video to learn more about omega-3 fatty acids and attention deficit hyperactivity disorder (ADHD).

This video is from the Daily Videos channel on Brighteon.com.