DHA (Omega-3)
DHA is essential for brain development and maintenance, but RCT results are mixed. A 2012 Cochrane review (n=4,080) found no cognitive benefit of omega-3 supplements in cognitively healthy older adults, and a 2025 meta-analysis found no meaningful ADAS-Cog benefit once Alzheimer's has developed. Two 6-month RCTs were positive: 900mg DHA/day improved learning and recognition memory in age-related cognitive decline (Yurko-Mauro et al., 2010 — sponsored by the algal-DHA maker Martek, with a Martek employee as lead author), and 1.16g/day improved memory and working-memory reaction times in healthy adults aged 18–45 with low DHA intake (Stonehouse 2013). A 2021 NIH-funded meta-analysis (n=81,210) found omega-3 supplements raise atrial fibrillation risk, more so above 1g/day.
Evidencia revisada el
Mecanismo de acción
Docosahexaenoic acid (DHA) is the primary structural omega-3 fatty acid in the brain, constituting ~40% of polyunsaturated fatty acids in neuronal membranes. DHA maintains membrane fluidity, enabling proper receptor function, ion channel activity, and synaptic vesicle dynamics. It also resolves neuroinflammation via specialised pro-resolving mediators (SPMs) and supports BDNF (brain-derived neurotrophic factor) expression for neuroplasticity.
Resumen de evidencia clínica
DHA is essential for brain development and maintenance, but RCT results are mixed. A 2012 Cochrane review (n=4,080) found no cognitive benefit of omega-3 supplements in cognitively healthy older adults, and a 2025 meta-analysis found no meaningful ADAS-Cog benefit once Alzheimer's has developed. Two 6-month RCTs were positive: 900mg DHA/day improved learning and recognition memory in age-related cognitive decline (Yurko-Mauro et al., 2010 — sponsored by the algal-DHA maker Martek, with a Martek employee as lead author), and 1.16g/day improved memory and working-memory reaction times in healthy adults aged 18–45 with low DHA intake (Stonehouse 2013). A 2021 NIH-funded meta-analysis (n=81,210) found omega-3 supplements raise atrial fibrillation risk, more so above 1g/day.
Matriz de efectos en humanos
Basado solo en ensayos clínicos en humanos. Se excluyen los datos en animales e in vitro.
| Efecto | Evidencia | Magnitud | Estudios |
|---|---|---|---|
| Memory (Age-Related Decline) | moderada | Moderado | 1 |
| Memory (Healthy Adults) | moderada | Moderado | 1 |
| Mood & Depression | moderada | Pequeño | — |
| Brain Structure Preservation | moderada | Moderado | — |
Clave de evidencia: Sólida = varios ECA consistentes · Moderada = ECA más pequeños o menos numerosos · Preliminar = ensayos iniciales o n pequeño · Mixta = resultados contradictorios
Beneficios documentados
- Learning and recognition memory in age-related cognitive decline (900mg/day)
- Memory and reaction time in healthy adults with low DHA intake (1.16g/day)
- Neuronal membrane integrity
Efectos secundarios y precauciones
- Atrial fibrillation: a 2021 meta-analysis of cardiovascular RCTs (PMID 34612056, n=81,210) found omega-3 supplements raised atrial fibrillation risk (HR 1.25), rising to HR 1.49 at more than 1g/day — talk to your doctor if you have heart-rhythm problems
- Fishy aftertaste or burps
- Mild GI problems (under 15% of participants in the Cochrane review, similar to placebo)
- Potential blood-thinning effect at very high doses (>3g/day)
Cómo tomarlo
Recomendaciones de combinación
Ingredientes que se combinan bien con DHA (Omega-3) y por qué.
DHA provides the structural fat for membranes; PS is the phospholipid that organises membrane architecture. Together they provide comprehensive neuronal membrane support.
DHA maintains membrane integrity while Lion's Mane stimulates NGF for neuroplasticity. Foundational + growth-oriented brain support.
Citicoline provides choline for membrane phospholipid synthesis; DHA provides the fatty acid substrate. Together they supply the raw materials for brain cell membrane repair.
Preguntas frecuentes
DHA vs EPA — which matters more for brain health?
DHA is the structural omega-3 in brain membranes (~40% of brain PUFA), making it more directly relevant to cognitive function. EPA is more potent as an anti-inflammatory and shows stronger effects for mood/depression. For brain health, prioritise DHA — the positive cognitive trials used 900mg–1.16g DHA per day. For mood support, prioritise EPA. Most quality supplements provide both; keep the atrial fibrillation signal above 1g/day of total omega-3 in mind.
Can I get enough DHA from diet alone?
If you eat fatty fish (salmon, mackerel, sardines) 2-3 times per week, you likely get sufficient DHA. Most people in Western diets consume far below optimal levels. Vegetarians and vegans are particularly at risk for deficiency — algal DHA supplements are the solution. A blood test (Omega-3 Index) can measure your actual status.
Is fish oil or algal oil better?
DHA is the same molecule from either source. Algal oil avoids mercury/heavy metal concerns and is suitable for vegetarians. Fish oil provides a natural DHA+EPA ratio. No head-to-head trial has compared them on cognitive outcomes — choose based on dietary preference and quality of the specific product.
How long before I notice cognitive effects?
DHA works by rebuilding membrane composition, which is a slow process. Both positive cognitive RCTs ran for 24 weeks (6 months). You will not feel an acute effect like caffeine or L-theanine. Think of DHA as a long-term infrastructure investment, not a performance supplement.
DHA (Omega-3) en América Latina
Productos disponibles en América Latina
Ninguno de los stacks que hemos auditado figura todavía en nuestro catálogo para América Latina.
ANVISA / COFEPRIS / INVIMA
Nota regulatoria
Esta página es contenido editorial con fines educativos y no constituye consejo médico. Los suplementos alimenticios están regulados por agencias nacionales: la Agência Nacional de Vigilância Sanitária (ANVISA) en Brasil bajo RDC 243/2018, la Comisión Federal para la Protección contra Riesgos Sanitarios (COFEPRIS) en México, y el Instituto Nacional de Vigilancia de Medicamentos y Alimentos (INVIMA) en Colombia. En Argentina, la Disposición 2105/2022 de la Administración Nacional de Medicamentos, Alimentos y Tecnología Médica (ANMAT) prohíbe siete productos concretos de las marcas Newmind y PURENOOTROPICS (Noopept, F-Phenibut y Bacopa) — no recomendamos productos con Noopept ni F-Phenibut a lectores en Argentina. Aviso para lectores en Brasil: el 2 de julio de 2026, ANVISA informó que algunos péptidos inyectables promocionados en internet, entre ellos GHK-Cu, BPC-157, TB-500, CJC-1295 e ipamorelin, no están regularizados en ninguna categoría (alimento, medicamento, cosmético ni suplemento alimentario) y son ilegales para cualquier uso en salud, incluido el estético. No enlazamos ni recomendamos proveedores que realicen envíos de formulaciones inyectables a Brasil. Consulte siempre a un profesional de la salud calificado antes de comenzar cualquier suplemento. / This page is editorial and not medical advice. Supplements are regulated by national agencies: the Agência Nacional de Vigilância Sanitária (ANVISA) in Brazil, the Comisión Federal para la Protección contra Riesgos Sanitarios (COFEPRIS) in Mexico, and the Instituto Nacional de Vigilancia de Medicamentos y Alimentos (INVIMA) in Colombia. In Argentina, ANMAT Disposition 2105/2022 prohibits seven specific products of the Newmind and PURENOOTROPICS brands (Noopept, F-Phenibut and Bacopa) — we do not recommend products containing Noopept or F-Phenibut to Argentine readers. Brazil notice: on 2 July 2026, ANVISA stated that some injectable peptides promoted online, including GHK-Cu, BPC-157, TB-500, CJC-1295 and ipamorelin, are not regularised in any category (food, medicine, cosmetic or food supplement) and are illegal for any health use, including aesthetic use. We do not link to or recommend vendors that ship injectable formulations to Brazil. Consult a qualified healthcare professional before starting any supplement.
Fuentes (6)ampliar
- PMID 20434961Beneficial effects of docosahexaenoic acid on cognition in age-related cognitive decline. (2010)
- PMID 23515006DHA supplementation improved both memory and reaction time in healthy young adults: a randomized controlled trial. (2013)
- PMID 22696350Omega 3 fatty acid for the prevention of cognitive decline and dementia. (2012)
- PMID 34612056Effect of Long-Term Marine ɷ-3 Fatty Acids Supplementation on the Risk of Atrial Fibrillation in Randomized Controlled Trials of Cardiovascular Outcomes: A Systematic Review and Meta-Analysis. (2021)
- PMID 39991006Cognitive efficacy of omega-3 fatty acids in Alzheimer's disease: A systematic review and meta-analysis. (2025)
- PMID 26265727A High Omega-3 Fatty Acid Multinutrient Supplement Benefits Cognition and Mobility in Older Women: A Randomized, Double-blind, Placebo-controlled Pilot Study. (2015)