Supplement × Supplement·a caution·Moderate evidence
Many green tea extracts contain caffeine and concentrated EGCG, increasing stimulant and liver-safety concerns.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
What is happening. Many green tea extracts contain caffeine and concentrated EGCG, increasing stimulant and liver-safety concerns.
Mechanism. Duplicate caffeine exposure plus catechin-related GI or hepatic risk.
Recommendation. Check labels for caffeine and EGCG content and avoid duplicate high doses.
Effect on the composite score
If both Caffeine and Green Tea Extract are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.
Every claim on this page is cited. PMIDs link straight to PubMed.
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NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.
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