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Herbal Extract

Bearberry Leaf Extract

Also known as: Uva Ursi, Arctostaphylos uva-ursi, Bearberry, Mountain Cranberry

C
Evidence

Bearberry leaf extract has been traditionally used to support urinary tract health, primarily due to its arbutin content which converts to hydroquinone in the body. Evidence for efficacy is limited and mixed, with most studies being small or dated.

Primary uses

  • Urinary tract support
  • Diuretic support
  • Urinary health

How it works

  • Arbutin metabolites may have antimicrobial properties
  • Potential astringent and diuretic effects
  • Possible mild antiseptic action on urinary tract tissues

Dosage

Typical range
400–840 mg daily (dried leaf or standardized extract)
Timing
Typically divided into 2–3 doses throughout the day
With food
May be taken with or without food; some sources recommend with meals to minimize potential GI irritation
Duration
Traditional use suggests 1–4 weeks of continuous use; long-term use (>4 weeks) not recommended without medical supervision due to hydroquinone accumulation concerns
Special populations
Not recommended in pregnancy, lactation, or children without professional guidance. Avoid in those with kidney disease or urinary retention.

Forms

  • Powder· 70/100
  • Capsule· 70/100
  • Leaf/Dried herb· 70/100
  • Liquid extract· 70/100

Safety

Common side effects

  • Nausea
  • Vomiting
  • Stomach upset or cramping
  • Tinnitus (with prolonged use)
  • Dark urine (due to hydroquinone)

Contraindications

  • Pregnancy and lactation
  • Kidney disease or compromised renal function
  • Urinary retention or bladder obstruction
  • Acute kidney inflammation
  • Inflammatory bowel conditions in susceptible individuals

Evidence notes

Traditional use for UTI support is well-documented, but modern RCT evidence is limited and inconsistent. Most available studies are small, older, or show modest benefits. Safety concerns regarding hydroquinone metabolites warrant caution.

Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.