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Head-to-head evidence comparison — which supplement is right for you?
Omega-3 wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
8 of 10 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
18 of 27 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Grape Seed Extract and Omega-3 have evidence — compare verdict strength side-by-side.
100-300mg (standardized to 95% OPCs)
With meals
Standardized extract (95% OPCs or proanthocyanidins)
2-3g combined EPA+DHA daily
With meals containing fat
Triglyceride form fish oil
4-8 weeks
8-12 weeks
8-12 weeks
4-8 weeks
2-4 weeks
Immediate
4-12 weeks
Phlebotonics for venous insufficiency
The Cochrane database of systematic reviews (2020) · Meta analysis · n=7690
Pooled data suggest that phlebotonics probably increase adverse events slightly, compared to placebo (RR 1.14, 95% CI 1.02 to 1.27; 37 studies; 5789 participants; moderate-certainty evidence).
Does the Grape Products Intake has an Effect on Body Weight in Adults: A Systematic Review and Meta-analysis of Randomized Controlled Trials
Current drug targets (2024) · Meta analysis · n=1284
The outcomes have revealed grape products intake to significantly decrease body weight (p = 0.001) and body mass index (p = 0.004) in obese participants, and also, a greater effect was observed when grape seed extract was used.
Low Dose Monacolin K Combined with Coenzyme Q10, Grape Seed, and Olive Leaf Extracts Lowers LDL Cholesterol in Patients with Mild Dyslipidemia: A Multicenter, Randomized Controlled Trial
Nutrients (2023) · Rct · n=105
LDL-C decreased by 26.46% on average (p < 0.001) during treatment with 10 mg of monacolin and by 16.77% on average during treatment with 3 mg of monacolin (p < 0.001).
Marine n-3 Fatty Acids and Prevention of Cardiovascular Disease and Cancer
The New England journal of medicine (2019) · Rct · n=25871
During a median follow-up of 5.3 years, a major cardiovascular event occurred in 386 participants in the n-3 group and in 419 in the placebo group (hazard ratio, 0.92; 95% confidence interval [CI], 0.80 to 1.06; P=0.24).
Omega-3 fatty acids for intermittent claudication
The Cochrane database of systematic reviews (2024) · Meta analysis · n=1830
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).
A systematic review and meta-analysis of the omega-3 fatty acids effects on brain-derived neurotrophic factor (BDNF)
Nutritional neuroscience (2024) · Meta analysis · n=587
The present systematic review and meta-analysis indicate the efficacy of omega-3 FAs in increasing the serum concentration of BDNF.
Based on meta-analysis showing mean reductions of -6.07 mmHg systolic and -2.82 mmHg diastolic. Effects more pronounced in younger adults and those with metabolic conditions. Dizziness may indicate blood pressure reduction.
Based on multiple meta-analyses showing EPA-dominant formulas >1g/day most effective. Effects plateau around 2-2.5g. Adjunctive use with antidepressants shows better outcomes than monotherapy.
AI-estimated from published studies. Interpret as directional guidance.
Omega-3 has a higher evidence score (9/10 vs 6/10) and wins in 3 of 3 categories.
For reduce inflammation, Omega-3 has a higher relevance score (90 vs 75).
No known interactions between Grape Seed Extract and Omega-3 have been documented in our database. However, always consult a healthcare provider before combining supplements.