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Head-to-head evidence comparison — which supplement is right for you?
Green Tea Extract vs Resistant Starch: Green Tea Extract has the stronger overall evidence (7.5 vs 6/10); they're alternatives for metabolic health — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Green Tea Extract wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
5 of 7 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
10 of 12 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Green Tea Extract and Resistant Starch have evidence — compare verdict strength side-by-side.
250-338mg EGCG a day with food (about 500-675mg of an extract standardised to 50% EGCG). 338 mg is a review-derived precaution (PMID 29580974), not an upper limit and not proof of safety
With meals, Morning or pre-exercise
Standardized extract (45-50% EGCG)
15-30g daily
With meals, Divide throughout day for higher doses
Raw potato starch (unmodified) or green banana flour
and 2 more not shown
Acute and 4-8 weeks
Acute
30-60 minutes
2-4 weeks
4-8 weeks
1-2 weeks
First 1-2 weeks
Green tea (Camellia sinensis) for the prevention of cancer
The Cochrane database of systematic reviews (2020) · Meta analysis · n=1795
For incident prostate cancer, the summary risk ratio (RR) in the green tea-supplemented participants was 0.50 (95% confidence interval (CI) 0.18 to 1.36), based on three studies and involving 201 participants (low-certainty evidence).
Impact of flavan-3-ols on blood pressure and endothelial function in diverse populations: a systematic review and meta-analysis of randomized controlled trials
European journal of preventive cardiology (2025) · Meta analysis · n=5205
Flavan-3-ol interventions included epicatechin, epigallocatechin-gallate, cocoa products, tea, grape extract, and apples delivering 586 mg (95% CI 510, 662) total flavan-3-ols.
The effects of green tea extract supplementation on body composition, obesity-related hormones and oxidative stress markers: a grade-assessed systematic review and dose-response meta-analysis of randomised controlled trials
The British journal of nutrition (2024) · Meta analysis · n=3802
Pooled effect sizes indicated that BM, BFP, BMI and MDA significantly reduced following GTE supplementation.
Metabolic Effects of Resistant Starch Type 2: A Systematic Literature Review and Meta-Analysis of Randomized Controlled Trials
Nutrients (2019) · Meta analysis · n=670
However, these outcomes were heavily influenced by positive results from a small number of individual studies which contradicted the conclusions of the majority of trials.
Acute Effects of Dietary Fiber in Starchy Foods on Glycemic and Insulinemic Responses: A Systematic Review of Randomized Controlled Crossover Trials
Nutrients (2023) · Systematic review
Data on insoluble DF and glucose metabolism are scarce.
The Effects of Resistant Starch on Biomarkers of Inflammation and Oxidative Stress: A Systematic Review and Meta-Analysis
Nutrition and cancer (2022) · Meta analysis · n=739
We used from the effect size, as estimated by the standardized mean difference (SMD) with 95% confidence intervals (95%CI) to perform the random method meta-analysis, with P value ≦0.05 as statistically significant.
Both points come from a systematic review of 17 randomised trials in 1,356 healthy adults (PMID 27324590), which found that 107 to 856 mg of EGCG a day for 4 to 14 weeks lowered LDL cholesterol by about 9.3 mg/dl, at any dose in that range. The effect depended slightly on baseline lipids, not on dose, so the curve is flat. A 12-week trial at 856.8 mg a day in 102 women with central obesity saw a non-significant downward trend in LDL (PMID 26093535). No optimum was identified, and the 856 mg point is not a safety ceiling: a safety review derived 338 mg EGCG a day as the safe intake for solid supplement doses (PMID 29580974).
AI-estimated from published studies. Interpret as directional guidance.
Green Tea Extract has a higher evidence score (7.5/10 vs 6/10) and wins in 2 of 3 categories.
For metabolic health, Green Tea Extract has a higher relevance score (70 vs 65).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.