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LongevityWeak evidence

Polyphenol blend

Also known as: polyphenol complex, antioxidant blend

Polyphenol blends combine polyphenol-rich extracts, typically from grape (OPC, resveratrol), green tea (EGCG), pine bark, pomegranate, olive or berries. Their effect and quality depend on the exact composition and doses on the label; the evidence relates to individual ingredients rather than the blends themselves.

What it is used for

  • antioxidant protection – weak evidence for clinical benefit of blends
  • vascular and blood pressure support – weak evidence, depends on ingredients
  • healthy ageing – evidence mainly from observational studies of polyphenol-rich diets

Forms and how they differ

blends with standardised extracts

prefer products stating mg and percentage of actives

blends with green tea extract

check the EGCG and caffeine content

'proprietary' blends without doses

impossible to judge how much of each they contain

When to take it

With food, once daily.

Pairs well with

A varied diet with fruit, vegetables, cocoa, tea and extra virgin olive oil.

Do not combine / separate

Do not combine with blood thinners without asking your doctor; keep a few hours' gap from iron supplements.

Watch out for

During pregnancy and breastfeeding, with liver disease (especially if green tea extract is included), or if you take blood thinners or other medicines, consult your doctor.

Safety

Do not exceed the label dose; high-dose green tea extracts on an empty stomach can burden the liver.

Practical tip

The cheapest and best studied source of polyphenols remains a colourful diet – a supplement can only add to it.

Products containing Polyphenol blend 1

Polyphenol blendextractAntioxidantHeart & vesselsLongevity
How to read the evidence rating
Strong evidenceModerate evidenceWeak evidenceNo evidence

Strong = several good human studies or official recommendations; moderate = promising but smaller studies; weak = few studies or mixed results; no evidence = claims not confirmed.

Combination check

Select the supplements you take and, if relevant, your medicines. We show what interferes, what needs a time gap and what to watch out for.

Check Polyphenol blend with others

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Important notice

This information is educational and does not replace advice from a doctor or pharmacist. We do not give medicine dosages. Supplements are no substitute for a varied diet; if pregnant, breastfeeding, ill or on medication, consult a doctor first.