The essential fatty acid with the strongest cardiovascular mortality evidence. Top quartile of plasma DHA associates with 21% lower all-cause mortality (UK Biobank n=85,000 · Harris 2024). DO-HEALTH 2025: D3 + omega-3 + exercise combo slows epigenetic clocks.
11Omega-3 appears in 11 protocols personalizable→Essential polyunsaturated fatty acids (not endogenously synthesized) · EPA and DHA are the biologically active ones · plant ALA converts poorly (<5% efficiency).
Omega-3 are essential polyunsaturated fatty acids with three main forms: ALA (alpha-linolenic acid · plant · chia/flax/walnuts), EPA (eicosapentaenoic · marine) and DHA (docosahexaenoic · marine). EPA and DHA are biologically active: precursors of resolvins, protectins and maresins (specialized lipids that actively resolve inflammation, not just suppress it).
ALA → EPA conversion in humans is extremely inefficient (1-10% in men, up to 21% in young women) · and DHA conversion is practically nil (<0.5%). That's why a vegetarian diet without fatty fish almost inevitably has low DHA · supplementing with algal omega-3 (vegan) is the only equivalent alternative.
The Omega-3 Index measures EPA+DHA sum as % of total fatty acids in red blood cells. Optimal target: ≥8%. Top quartile (≥10%) associates with 21% lower all-cause mortality in UK Biobank (Harris et al · Mayo Clin Proc 2024 · n=85,000).
5 pivotal studies with DOI · large meta-analyses and cardinal trials from the latest cycle. Mapped to Hallmarks López-Otín 2023.
| Study | Finding | Hallmarks |
|---|---|---|
Omega-3 Index and all-cause mortality Harris et al · Mayo Clin Proc 2024 | Prospective UK Biobank n=85,425 · 11 years follow-up · top DHA quartile: HR 0.79 all-cause mortality, 0.83 CV, 0.85 cancer vs bottom quartile. | MortalityCV |
Meta-analysis omega-3 and CV events Khan et al · EClinicalMedicine 2021 | Meta 40 RCTs · n=135,267 · 2-4 g/d EPA+DHA: −18% non-fatal MI, −21% CV mortality, −9% total CV events. Dose-dependent effect up to 3 g/day. | Inflamm.CV |
DO-HEALTH · omega-3 + D3 + exercise epigenetics Bischoff-Ferrari et al · Nature Aging 2025 | 3-year RCT · n=2,157 >70 years · 1 g omega-3 + 2,000 IU D3 + exercise combo slowed epigenetic clocks (PhenoAge −2.9 m, GrimAge2 −3.3 m, DunedinPACE −3.8 m). Additive not synergistic. | Epigen.Inflamm. |
REDUCE-IT · pure EPA (icosapent ethyl) CV events Bhatt et al · NEJM 2019 | 4.9-year RCT · n=8,179 high CV risk patients · 4 g pure EPA (icosapent) 25% MACE reduction vs placebo. Non-LDL mechanism · anti-thrombotic + plaque stabilization. | MACEThrombo. |
DHA and cognitive function in older adults Yurko-Mauro et al · Alzheimers Dement 2017 | Meta 25 RCTs · n=8,327 · 900-1,500 mg DHA/d 6-24 months improved episodic memory and processing speed. Greater effect in mild cognitive impairment and APOE4 carriers. | CognitionAPOE4 |
My Protocol generates 3 personalized plans with exact form, dose and combos based on your profile. No commitment.
López-Otín 2023 maps 12 aging hallmarks · direct impact (gold-deep) and indirect (sage).
Protocol based on initial Omega-3 Index · ≥8% RBC target · with fatty meal for optimal absorption.
OmegaQuant offers home kit · take dry drop on filter paper and ship. Knowing baseline (typically 4-5% in average Spaniard) defines protocol.
With fatty meal (3× absorption increase). Re-esterified TG for better absorption · avoid ethyl-ester (EE) due to lower bioavailability and higher oxidation. Re-measure Omega-3 Index at 12 weeks.
Once target ≥8% reached, maintain with lower dose. Re-test every 6-12 months. If you reduce fatty fish intake, increase supplement dose.
For high CV risk patients (post-MI, severe hypertriglyceridemia) under cardiological supervision · this is the REDUCE-IT 2019 protocol (prescription) · not for general use.
3 main sources · differences in bioavailability, sustainability and chemical form (TG · EE · PL · rTG). Chemical form matters more than origin.
3 tiers · priority: IFOS certification (quality/purity), TG or rTG form, EPA:DHA ratio by goal.
Dose: 1,600 mg EPA + 800 mg DHA per 2 softgels
Form: Natural TG · lemon flavor
Cert.: IFOS 5-star · GOED · third-party tested
Fillers: Zero · fish gelatin · tocopherol antioxidant
Dose: 650 mg EPA + 450 mg DHA per softgel
Form: TG · natural lemon flavor
Cert.: IFOS · Friend of the Sea
Fillers: Extra virgin olive oil · rosemary antioxidant
Dose: 500 mg EPA + 250 mg DHA per softgel
Form: TG · neutral flavor
Cert.: GOED · IFOS · GMP
Fillers: Bovine gelatin · mixed tocopherol
My Protocol recommends form + brand + exact dose based on your age, budget and biomarkers. No commitment · 3 minutes.
1 specific biomarker (RBC Omega-3 Index) + 2 complementary markers to evaluate real cardiovascular impact.
Omega-3 Index (EPA+DHA % in RBC). Target ≥8% · optimal ≥10%. Reflects 90-120 day body stock (RBC half-life). OmegaQuant offers home kit ~45 €. Also available in Spanish private analytics under 'red blood cell fatty acid profile' name.
Fasting triglycerides. Omega-3 at 2-4 g/day reduces TG 25-35% based on baseline. If your TG >150 mg/dL, expect significant reduction in 12 weeks. Any general analytic.
Plasma omega-6 : omega-3 ratio. Optimal target <4:1 (typical Western diet 15-20:1). Supplementation + reduction of industrial vegetable oils (sunflower, corn, soy) lowers ratio in 6 months. ~35 € in specialized analytic.
We verify clinics in-situ · analytics with clinical interpretation · no markups. Home test directly from OmegaQuant available if you prefer not to travel.
Omega-3 has excellent safety profile · few but real contraindications when combined with anticoagulants or procedures.
4 combos with clinical evidence · each links to partner supplement guide.
DO-HEALTH 2025 demonstrated additive D3 + omega-3 effect on epigenetic slowing (PhenoAge −2.9 m over 3 years). Both modulate inflammaging through complementary pathways.
Q10 protects omega-3 from intracellular oxidation (PUFAs highly oxidizable). Recommended combo in cardio-protection, especially in statin users (Q10 depletion).
Red carotenoid from microalgae · protects omega-3 from lipid peroxidation. Already endogenous combo in krill. Improves long-term Omega-3 Index stability.
Mg modulates EPA→resolvin conversion (pro-resolutive lipids). Mg + omega-3 combo improves heart rate variability (HRV) more than each alone.
8 real questions · answers based on literature, not marketing.
Supplements · treatments · biomarkers for your complete protocol.
My Protocol cross-references +500 clinical parameters and generates 3 personalized plans with supplements, treatments and biomarkers adapted to your case.
Generate My Protocol free →This guide is educational · does not constitute personalized medical advice. Before supplementing, consult a healthcare professional. Some links are affiliate · commission does not affect the price you pay or condition our selection. No sponsorships. No advertorials.