Reviewed by Jessie, BSc Biomedical Science · Formulation Lead, Purest Kids
TL;DR — Paediatric evidence on omega-3 and mood is still emerging, but the biology is plausible: DHA concentrates in the prefrontal cortex and limbic system, and EPA influences inflammatory pathways linked to depressive symptoms. A 2020 meta-analysis of 11 trials found omega-3 reduced anxiety symptoms in children and adolescents versus placebo.
A question that is being asked more often
Parents navigating children's mental health in the post-pandemic landscape are increasingly asking whether nutrition plays a role in their child's emotional regulation and resilience. Omega-3 supplementation has entered this conversation — and the research, while still early-stage for paediatric populations, provides some grounding for the question.
The biological mechanism
DHA is highly concentrated in the prefrontal cortex and limbic system — the brain regions involved in emotional regulation, stress response, and mood. DHA influences the fluidity of neuronal membranes in these regions, which affects the efficiency of neurotransmitter signalling, including serotonin and dopamine pathways.
EPA appears to play a more direct role in mood-related outcomes than DHA, based on the adult literature. EPA inhibits enzymes involved in the breakdown of arachidonic acid into pro-inflammatory eicosanoids that have been associated with depressive symptoms. Several meta-analyses in adults have found EPA-dominant formulations to be more effective than DHA-dominant formulations for depressive outcomes.
What the research shows in children and adolescents
The evidence base in children is smaller than in adults, but growing. A 2020 meta-analysis of 11 trials found that omega-3 supplementation was associated with significant reductions in anxiety symptoms in children and adolescents. A randomised trial in children aged 8–12 with anxiety found that EPA + DHA supplementation reduced anxiety ratings compared to placebo, with improvements in sleep as a secondary outcome.
The effect sizes are modest, and the research quality varies. These findings do not support omega-3 supplementation as a treatment for anxiety disorders — but they do add to the biological case for adequate omega-3 intake as part of foundational brain health in children.
What it does not mean
Omega-3 is not a substitute for mental health support, therapy, or medical treatment for mood disorders. For parents whose children are experiencing significant anxiety or mood difficulties, the right first step is a conversation with a paediatrician or child psychologist. Omega-3 supplementation is a nutritional consideration — not a clinical intervention.
Omega-3 Mango Burstlets — 450mg DHA, 150mg EPA per serve →
References
- Su KP, et al. "Association of use of omega-3 polyunsaturated fatty acids with changes in severity of anxiety symptoms: a systematic review and meta-analysis." JAMA Network Open, 2018.
- Hawkey E, Nigg JT. "Omega-3 fatty acid and ADHD: blood level analysis and meta-analytic extension of supplementation trials." Clinical Psychology Review, 2014.
- Grosso G, et al. "Omega-3 fatty acids and depression: scientific evidence and biological mechanisms." Oxidative Medicine and Cellular Longevity, 2014.