Omega-3 Fish Oil
High-concentration EPA/DHA fish oil for cardiovascular, brain, and inflammatory support — among the most rigorously studied longevity supplements. Recent 2025 evidence links higher omega-3 intake to lower all-cause and cardiovascular mortality in people with established heart disease, and a 2025 Nature Aging analysis of the DO-HEALTH trial found that 1 g/day modestly slowed biological aging across several epigenetic clocks. Individual results vary; discuss use with your physician.
Mechanism of Action
EPA and DHA incorporate into cell-membrane phospholipids, where they modulate the production of inflammatory eicosanoids and give rise to specialized pro-resolving mediators (resolvins and protectins) that help resolve inflammation. They support endothelial function, help lower triglycerides, and stabilize neuronal membrane signaling. Emerging trial data suggest these membrane and anti-inflammatory effects may also influence epigenetic markers of biological aging, though this remains an area of active research.
Latest Research
Reviewed Aug 11, 2026
A 2025 analysis of the DO-HEALTH randomized trial (777 adults aged 70+, 3 years) reported that 1 g/day of omega-3 modestly slowed biological aging across several epigenetic clocks — by up to roughly four months — with additive benefits when combined with vitamin D and strength training (Nature Aging, 2025). Separately, a 2025 analysis of U.S. NHANES data in adults with cardiovascular disease found that those in the highest quintile of omega-3 intake had about 23% lower all-cause mortality (HR 0.77, 95% CI 0.60–0.99) and about 37% lower cardiovascular mortality (HR 0.63, 95% CI 0.42–0.95) than those in the lowest quintile. These are observational and trial-level associations in specific populations and do not guarantee individual results; omega-3 is not a treatment for any disease. Discuss supplementation with your physician, especially if you take blood thinners.
Practitioner-grade option
Shop Krill Oil — phospholipid EPA/DHA + astaxanthinHighest vs lowest omega-3 intake · adults with CVD
Omega-3 intake & mortality risk
Source: NHANES 2001–2018, adults with cardiovascular disease (n=3,826); Scientific Reports, 2025. Observational association, not proof of causation.
Latest research
- Bischoff-Ferrari HA et al. Vitamin D, omega-3 and exercise on DNA-methylation clocks of biological aging (DO-HEALTH). Nature Aging, 2025.
- Dietary omega-3 intake and all-cause & cardiovascular mortality in adults with cardiovascular disease. Scientific Reports, 2025.
- Effect of omega-3 fatty acids on cardiovascular disease risk: systematic review and meta-analysis with meta-regression. Clinical and Translational Discovery, 2025.
Dosing Protocol
2-4g combined EPA/DHAmg
Standard starting dose based on research
Therapeutic Range
2000
Minimum
4000
Maximum
With meals containing fat
Dosages are general guidelines. Individual requirements vary based on body weight, health status, and specific goals. Start with lower doses and adjust based on response.
Benefits
Primary Benefits
- Cardiovascular protection
- Anti-inflammatory
- Brain health
- Triglyceride reduction
Secondary Benefits
Safety Information
Contraindications
Do not use if any of the following apply:
- •Blood thinners (high dose)
- •Fish allergy
- •Surgery within 2 weeks
Potential Side Effects
Some users may experience:
This is not a complete list of interactions or side effects. Individual responses vary. Always start with the lowest effective dose and monitor your response. Report any adverse effects to your healthcare provider.
Quality Markers
Look for these specific quality indicators when sourcing this compound:
- IFOS 5-star certified
- Triglyceride form
- Third-party tested for heavy metals
Trusted Certifications
Note: Supplement quality varies dramatically between brands. Cheap supplements often contain fillers, incorrect doses, or contaminants. Investing in quality products from reputable manufacturers is essential for safety and efficacy.
Evidence Profile
Evidence Score
9/10
Strong Evidence
Multiple high-quality RCTs, meta-analyses, or consistent mechanistic data
Evidence Scale
8-10
Strong
5-7
Moderate
1-4
Emerging
Sample member
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