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Cranberry Seed

Also known as: Vaccinium macrocarpon seed, cranberry seed oil, cranberry seed powder

Evidence under review. — Not yet rated

Cranberry seed is rich in antioxidants and fatty acids, but clinical evidence for its benefits is very limited.

  • What it does

    Cranberry seed comes from the seeds of the cranberry fruit (Vaccinium macrocarpon) and is typically used as an oil or powder. It is notably rich in tocopherols (vitamin E forms), omega-3 and...

  • Evidence quality

    Evidence base hasn't been formally rated yet. See research below.

  • Clinical dose

    No established dose

See full breakdown ↓ Methodology →

What the Science Says

Cranberry seed comes from the seeds of the cranberry fruit (Vaccinium macrocarpon) and is typically used as an oil or powder. It is notably rich in tocopherols (vitamin E forms), omega-3 and omega-6 fatty acids in a reportedly balanced ratio, and polyphenol antioxidants. These nutrients are associated with general antioxidant and skin-health properties, though direct clinical evidence specifically for cranberry seed — as opposed to whole cranberry or cranberry juice — is very limited and no established effective dose exists.

What It Doesn't Do

Not proven to prevent or treat urinary tract infections on its own — that evidence is for whole cranberry or juice, not the seed. No clinical proof it significantly lowers cholesterol or blood pressure. Not a substitute for a balanced diet rich in omega-3s. No evidence it reverses skin aging or acts as a standalone anti-inflammatory treatment.

Evidence-Based Benefits

Cranberry seed is a natural source of tocopherols and polyphenols with antioxidant properties.

Weak Evidence

Effective at: No established dose

Cranberry seed oil contains omega-3 and omega-6 fatty acids in a roughly balanced ratio.

Weak Evidence

Effective at: No established dose

Absorption & Bioavailability

Unknown — no clinical pharmacokinetic data available for cranberry seed specifically. Fat-soluble nutrients like tocopherols in the oil form are generally better absorbed with dietary fat.

Red Flags to Watch For

  • No clinical trials specifically on cranberry seed have been provided; most marketing claims borrow from whole-cranberry or cranberry juice research, which is not the same ingredient.
  • Products vary widely in whether they use cold-pressed oil, seed powder, or extract — these have different nutrient profiles and no standardized dosing exists.
  • Cranberry seed oil is sometimes marketed for UTI prevention, but this claim is not supported by evidence for the seed form specifically.
  • High-dose vitamin E supplementation (from tocopherols) has been associated with increased bleeding risk in some populations — relevant if consuming concentrated cranberry seed oil alongside other supplements.

Research Sources

  • General knowledge — no paper abstracts were provided for this ingredient. Limited published research available specifically on cranberry seed as a supplement ingredient.

This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25