Omega-3
Omega-3 Fatty Acids (EPA/DHA)
Essential fatty acids critical for brain health, mood regulation, and reducing inflammation throughout the body.
Omega-3 fatty acids, particularly EPA and DHA from fish oil, are essential fats that the body cannot produce. They play crucial roles in brain structure, reducing inflammation, supporting cardiovascular health, and regulating mood. Higher EPA ratios are particularly beneficial for mood disorders.
Mechanisms of Action
Brain Structure
DHA is a major structural component of brain tissue
Anti-Inflammatory
Reduces systemic inflammation throughout the body
Neurotransmitter Support
Supports serotonin and dopamine signaling
Recommended Dose
2-3g combined EPA+DHA daily
Optimal Timing
- With meals containing fat
Take with food
Best Form
Triglyceride form fish oil
Alternatives: Ethyl ester form, Algae-based (vegan), Krill oil
Triglyceride form absorbs better than ethyl ester. Look for IFOS certification for purity. Algae-based provides DHA but limited EPA.
Duration
Minimum: 8 weeks
Optimal: 12 weeks
Cycling: Not required
Note: Take with fatty meals for best absorption. Can split dose AM/PM. Higher EPA ratio (2:1 or more) preferred for mood benefits.
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Improved Mood
Reduction in depressive symptoms
Reduced Inflammation
Lower CRP and inflammatory markers
Fishy Aftertaste
Some experience fishy burps or aftertaste
Better Focus
Enhanced concentration and mental clarity
Recommended; DHA important for fetal brain development. Use purified fish oil.
Generally safe; adjust dose by weight
Who Should NOT Take This
- Fish/shellfish allergy (use algae-based)
- Upcoming surgery (stop 1-2 weeks before)
Drug Interactions
May increase bleeding risk; monitor INR if on warfarin
Additive blood pressure lowering effect
Possible Side Effects
Tip: Take with meals, freeze capsules, or use enteric-coated
Tip: Take with food, reduce dose initially
Tip: Reduce dose if concerning
Warnings
- Check for heavy metal testing/IFOS certification
- Store properly to prevent oxidation
- Rancid fish oil may be harmful - smell before use
Vitamin D3
complementaryBoth are fat-soluble and support mood/brain health
Enhanced mood support and immune function
Curcumin
enhancesBoth reduce inflammation through different pathways
Synergistic anti-inflammatory effects
Aged Garlic Extract
complementaryDifferent cardiovascular mechanisms
Multi-target cardiovascular protection
Astaxanthin
complementaryBoth support cardiovascular and skin health
Comprehensive cardiovascular and anti-inflammatory support
B-Complex
stacks-wellBoth support brain health and mood
Comprehensive brain and mood support
Bergamot
complementaryOmega-3 for triglycerides; bergamot for LDL
Comprehensive lipid management
Black Seed Oil
complementaryDifferent healthy fats with complementary benefits
Comprehensive anti-inflammatory and metabolic support
Carnitine L-Tartrate
complementaryOmega-3 may enhance carnitine's effects on fat oxidation
Improved fat metabolism and recovery
Citicoline
complementaryBoth support brain structure and function
Comprehensive brain health support
CoQ10
complementaryBoth support cardiovascular health
Comprehensive heart and energy support
Evening Primrose Oil
complementaryDifferent essential fatty acids with complementary effects
Balanced omega fatty acid profile
Lion's Mane
stacks-wellBoth support brain structure and function
Comprehensive brain health support
Lutein + Zeaxanthin
enhancesDHA is concentrated in retina; omega-3 improves carotenoid absorption
Enhanced eye health and better lutein uptake
Meso-Zeaxanthin
complementaryDHA is concentrated in retinal membranes
Comprehensive eye health support
NAC
complementaryBoth support mood through different mechanisms
Comprehensive mood and antioxidant support
Nattokinase
complementaryBoth support cardiovascular health (use caution — both affect clotting)
Comprehensive cardiovascular support
PEA
complementaryPEA is a fatty acid amide; omega-3s support similar pathways
Comprehensive anti-inflammatory support
Phosphatidylserine
enhancesBoth support brain cell membrane health
Comprehensive phospholipid and fatty acid support
Red Yeast Rice
complementaryDifferent lipid targets
Comprehensive lipid management
Saffron
complementaryBoth support mood through different mechanisms
Enhanced antidepressant effects
SAMe
complementaryBoth support mood through different mechanisms
Comprehensive mood support
Tart Cherry
complementaryBoth reduce inflammation
Enhanced recovery and anti-inflammatory effects
Top studies from 40+ peer-reviewed papers
Tobias DK et al. • Nature communications (2025)
“This meta-analysis examined the effects of Omega-3.”
Key Findings:
- Mean body mass index (BMI) was 27.5 kg/m2 (SD = 5.3), with 51% female and 17% Black race/ethnicity.
- T2D incidence (cases/1000py) at median follow-up of 5.3 y was 3.98 for vitamin D and 4.37 for placebo (hazard ratio [HR] = 0.91; 95% confidence interval [CI] = 0.76, 1.09).
- In conclusion, Vitamin D supplementation did not reduce T2D in older US adults, but a modest reduction was observed when meta-analyzed with prior trials.
- Trial Registration: ClinicalTrials.gov #NCT01633177.
Mohammady M et al. • The Cochrane database of systematic reviews (2024)
“The evidence is very uncertain about the effect of omega-3 fatty acids in people with intermittent claudication on quality of life, walking distance (pain-free or maximal), ankle-brachial index, and the incidence of revascularisation procedures or frequency of amputation in the lower limb.”
Key Findings:
- Omega-3 compared with a control may have little to no effect on ankle-brachial index (MD -0.02, 95% CI -0.08 to 0.04; 3 studies, 168 participants; very low-certainty evidence).
- The evidence is very uncertain about the effect of omega-3 fatty acids in people with intermittent claudication on quality of life, walking distance (pain-free or maximal), ankle-brachial index, and the incidence of revascularisation procedures or frequency of amputation in the lower limb.
- The evidence suggests that omega-3 results in little to no difference in adverse events.
- Further high-quality research is needed to fully evaluate short- and long-term effects of omega-3 fatty acids on the most clinically relevant outcomes in people with intermittent claudication.
Ziaei S et al. • Nutritional neuroscience (2024)
“The present systematic review and meta-analysis indicate the efficacy of omega-3 FAs in increasing the serum concentration of BDNF.”
Key Findings:
- The present systematic review and meta-analysis indicate the efficacy of omega-3 FAs in increasing the serum concentration of BDNF.
- Therefore, omega-3 FAs should be prioritized as agents for increasing BDNF in interventions.
- Further research warranted to confirm findings
Mohsen G et al. • Nutrients (2023)
“although reduced inflammatory markers were observed, preoperative administration of omega-3 FAs immunonutrients had no significant effect on the postoperative inflammatory response in patients undergoing abdominal surgeries.”
Key Findings:
- There was no significant difference between the groups with respect to inflammatory markers IL-6: -0.55 [-1.22; 0.12] p = 0.10, CRP: -0.14 [-0.67; 0.40] p = 0.55, WBC: -0.58 [-3.05; 1.89] p = 0.42, or hospital stay -0.5 [-1.43; 0.41] p = 0.2.
- although reduced inflammatory markers were observed, preoperative administration of omega-3 FAs immunonutrients had no significant effect on the postoperative inflammatory response in patients undergoing abdominal surgeries.
- Yet, results obtained from this study are inconclusive, likely attributed to the limited number of trials and patients included.
- Further studies are required to obtain a better educated verdict.
Sepidarkish M et al. • Critical reviews in food science and nutrition (2022)
“The evidence supports a beneficial effect of omega-3 FAs intake on serum adiponectin levels but does not appear to impact on leptin concentrations.”
Key Findings:
- Omega-3 FAs intake was associated with a significant increase in plasma adiponectin levels (n = 43; 3,434 participants; SMD: 0.21, 95% CI: 0.04, 0.37; p = 0.01; I2= 80.14%).
- However, omega-3 FAs intake had no significant effect on leptin levels (SMD: -0.02, 95% CI: -0.20, 0.17, I2= 54.13%).
- The evidence supports a beneficial effect of omega-3 FAs intake on serum adiponectin levels but does not appear to impact on leptin concentrations.
- Larger well-designed RCTs are still required to evaluate the effect of omega-3 FAs on leptin in specific diseases.
Study Type Distribution
Goals This Supplement Supports
Related Goals
This information is for educational purposes only and is not intended as medical advice. Always consult a qualified healthcare provider before starting any supplement.