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Head-to-head evidence comparison — which supplement is right for you?
Arginine wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Probably helps
11 of 19 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
7 of 9 studies with measurable effects showed benefit.
Top outcomes
3-6g daily
30-60 minutes before exercise, Divided doses throughout the day for cardiovascular benefits
L-Arginine powder or capsules
36mg PACs (proanthocyanidins) or 400-500mg extract standardized to PAC content
Morning and evening, With or without food
Extract standardized to 36mg PACs (A-type)
30-60 minutes
During exercise
2-4 weeks
Immediate
Ongoing
Nutritional interventions for preventing and treating pressure ulcers
The Cochrane database of systematic reviews (2024) · Meta analysis · n=7920
Compared to standard diet, protein supplements may result in little to no difference in pressure ulcer incidence (protein 21 per 1000, standard diet 28 per 1000; RR 0.75, 95% CI 0.49 to 1.14; 4 studies, 4264 participants; low-certainty evidence).
Comparative Effects of Different Nutritional Supplements on Inflammation, Nutritional Status, and Clinical Outcomes in Colorectal Cancer Patients: A Systematic Review and Network Meta-Analysis
Nutrients (2023) · Meta analysis · n=2841
Glutamine was superior in decreasing tumor necrosis factor-α (MD -25.2; 95% CrI [-32.62, -17.95]), whereas combined omega-3 and arginine supplementation was more effective in decreasing interleukin-6 (MD -61.41; 95% CrI [-97.85, -24.85]).
Nutritional interventions for treating foot ulcers in people with diabetes
The Cochrane database of systematic reviews (2020) · Meta analysis · n=629
It is also uncertain whether arginine, glutamine and β-hydroxy-β-methylbutyrate supplement increases the proportion of ulcers healed at 16 weeks compared with placebo (RR 1.09, 95% CI 0.85 to 1.40).
Efficacy and safety of dietary polyphenols in rheumatoid arthritis: A systematic review and meta-analysis of 47 randomized controlled trials
Frontiers in immunology (2023) · Meta analysis · n=3852
Dietary polyphenols may improve DAS28, reduce C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR), and improve oxidative stress, etc.
Polyphenols for the Prevention or Management of Preeclampsia: A Systematic Review and Meta-Analysis
BJOG : an international journal of obstetrics and gynaecology (2025) · Meta analysis · n=349
ECGC and resveratrol supplements have been investigated for potential effects in managing clinical signs and symptoms of preeclampsia; however, evidence on the clinical and adverse effects of polyphenols is limited and uncertain.
Supplementation with Highly Standardized Cranberry Extract Phytosome Achieved the Modulation of Urinary Tract Infection Episodes in Diabetic Postmenopausal Women Taking SGLT-2 Inhibitors: A RCT Study
Nutrients (2024) · Rct
Considering UTI episodes, during the six-month supplementation period, an increase of 1.321 (95% CI: -0.322; 2.9650) was observed in the placebo group, while it remained at a steady value of 0.393 (95% CI: -4.230; 5.016) in the supplemented group.
Based on meta-analysis showing mean reductions of 5.39 mmHg systolic and 2.66 mmHg diastolic. Effects are modest and may not be clinically significant for all individuals. GI side effects increase notably above 6g.
Based on multiple RCTs showing UTI reduction in women. Effect size varies significantly between studies (15-73% reduction). Most effective for recurrent UTI prevention. PAC-standardized extracts preferred over juice forms for consistent dosing and reduced GI effects.
AI-estimated from published studies. Interpret as directional guidance.
Arginine has a higher evidence score (9/10 vs 7.5/10) and wins in 2 of 3 categories.
No known interactions between Arginine and Cranberry Extract have been documented in our database. However, always consult a healthcare provider before combining supplements.