Which has more polyphenols — tea or dealcoholised wine?
Polyphenol comparison between beverages is complicated by the fact that polyphenol types matter as much as total quantity — different phenolic compounds have different bioavailability, metabolic pathways, and target tissues. A simple mg-for-mg comparison misses important qualitative differences.
Green tea is dominated by catechins, particularly EGCG (epigallocatechin gallate) — one of the most studied individual polyphenols in nutritional science. EGCG at doses achievable from 2–3 cups of quality green tea (100–300mg) has clinical evidence for cancer cell apoptosis induction, cardiovascular protective effects, anti-inflammatory action, and metabolic benefits. Bioavailability is moderate (15–30% absorbed in small intestine) with significant inter-individual variation based on gut microbiome composition.
Black tea is somewhat lower in catechins than green (the oxidation process during manufacturing converts catechins to theaflavins and thearubigins), but theaflavins have their own strong evidence for LDL cholesterol reduction and cardiovascular protection. Black tea also delivers theabrownins, very large polymeric compounds with interesting anti-obesity evidence in animal models.
Red wine and dealcoholised red wine offer resveratrol (from grape skins, particularly from Pinot Noir and Malbec varieties), quercetin (a flavonol with broad anti-inflammatory evidence), and proanthocyanidins (the tannin polymers with LDL oxidation inhibition properties). Resveratrol activates SIRT1 (a longevity-associated enzyme) and has shown cardiovascular protective effects at doses achievable from moderate regular wine consumption — though bioavailability from wine is much better than from resveratrol supplements in capsule form.
Optimal strategy: diverse sources. Tea polyphenols and wine polyphenols are complementary, not competing. A zero-proof lifestyle combining daily green or black tea with occasional dealcoholised red wine delivers both the catechin/theaflavin profile and the resveratrol/proanthocyanidin spectrum — likely superior to either alone.
| Source | Total Polyphenols/serving | Key Compounds | Bioavailability |
|---|---|---|---|
| Green tea (250ml) | 200–400mg | EGCG, catechins | 15–30% |
| Black tea (250ml) | 150–300mg | Theaflavins, thearubigins | 15–25% |
| NA red wine (150ml) | 50–100mg | Resveratrol, quercetin, proanthocyanidins | 25–40% |
| NA white wine (150ml) | 10–30mg | Quercetin, tyrosol | 20–30% |
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