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Head-to-head evidence comparison — which supplement is right for you?
Marine Collagen wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
6 of 7 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
10 of 15 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Marine Collagen and Potassium have evidence — compare verdict strength side-by-side.
5-10g daily
Morning or evening, Can add to beverages or food
Hydrolyzed marine collagen powder
99-500mg daily from supplements (food provides more)
With food to reduce GI upset, Spread throughout day, During/after exercise for athletes
Potassium Citrate or Potassium Gluconate
8-12 weeks
8-12 weeks
4-8 weeks
12-16 weeks
2-4 weeks
1-2 weeks
Long-term
With excess or kidney issues
Marine collagen and its derivatives: Versatile and sustainable bio-resources for healthcare
Materials science & engineering. C, Materials for biological applications (2020) · Systematic review
Particular attention is given to the bioactive properties of marine collagen that are being explored in preclinical and clinical studies, and pave the way to an increased demand for this biomaterial in the next future.
Collagen and gelatin
Annual review of food science and technology (2015) · Systematic review
Numerous studies have investigated the bioactivities and biological effects of collagen, gelatin, and their hydrolysis peptides, using both in vitro and in vivo assay models.
Recent Advancements in Marine Collagen: Exploring New Sources, Processing Approaches, and Nutritional Applications
Marine drugs (2025) · Systematic review
Hence, recent interest has propelled research in identifying novel collagen sources and advancing technologies to produce marine collagen-based products.
Effect of changes in potassium intake on blood pressure: a dose–response meta-analysis of randomized clinical trials (2000–2024)
Clinical Kidney Journal (2025) · Meta analysis · n=2500
Dose-response analysis of RCTs from 2000-2024
Magnesium and Potassium Supplementation for Systolic Blood Pressure Reduction in the General Normotensive Population: A Systematic Review and Subgroup Meta-Analysis for Optimal Dosage and Treatment Length
Nutrients (2024) · Meta analysis
Both supplements demonstrated greater reductions in SBP for the general population at lower dosages and longer treatment durations.
Sex-specific associations between sodium and potassium intake and overall and cause-specific mortality: a large prospective U.S. cohort study, systematic review, and updated meta-analysis of cohort studies
BMC medicine (2024) · Meta analysis · n=237036
Meta-analysis examining Potassium efficacy
Based on systematic reviews of marine collagen for skin applications. Studies show variable results with 8-12 week protocols. Fish source and peptide size affect bioavailability. Most studies used 5-10g daily doses.
AI-estimated from published studies. Interpret as directional guidance.
Marine Collagen has a higher evidence score (6/10 vs 8.5/10) and wins in 2 of 3 categories.
For reduce inflammation, Potassium has a higher relevance score (85 vs 65).
No known interactions between Marine Collagen and Potassium have been documented in our database. However, always consult a healthcare provider before combining supplements.