# Betula pendula

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/betula-pendula
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-02
**Evidence Score:** 2 / 10
**Category:** European
**Also Known As:** Silver birch, European white birch, Weeping birch, Common birch, Warty birch, White birch, Lady birch, Birke, Bouleau verruqueux, Betula alba, Betula verrucosa

## Overview

Betula pendula, commonly known as silver birch, contains bioactive compounds including betulin, betulinic acid, and flavonoids such as hyperoside and quercetin derivatives that drive its pharmacological activity. These compounds exert antioxidant, [anti-inflammatory](/ingredients/condition/inflammation), and diuretic effects primarily through [free radical scaveng](/ingredients/condition/antioxidant)ing and inhibition of pro-inflammatory enzyme pathways.

## Health Benefits

• May protect against DNA damage - in vitro studies showed aqueous leaf extract (0.5-5% v/v) demonstrated antigenotoxic effects against mitomycin-C in human lymphocytes (preliminary evidence)
• Potential [neuroprotective effect](/ingredients/condition/cognitive)s - rat studies showed 200 mg/kg oral extract improved memory and reduced Alzheimer's markers including tau phosphorylation and amyloid aggregation (preliminary evidence)
• [Anti-inflammatory](/ingredients/condition/inflammation) activity - rat model demonstrated significant reduction in TNF-α and IL-1β inflammatory markers (p<0.05 to p<0.001) (preliminary evidence)
• Antioxidant properties - animal studies showed reduced [lipid peroxidation](/ingredients/condition/antioxidant) and increased antioxidant markers in brain tissue (preliminary evidence)
• Traditional use for joint health - historically used in European medicine for arthritis and degenerative joint disease (traditional evidence only)

## Mechanism of Action

Betulinic acid and betulin in Betula pendula interact with NF-κB signaling pathways, suppressing downstream [pro-inflammatory cytokine](/ingredients/condition/inflammation) production including TNF-α and IL-6. Flavonoid constituents such as hyperoside and quercetin glycosides scavenge [reactive oxygen species](/ingredients/condition/antioxidant) and chelate transition metal ions, reducing oxidative DNA damage as demonstrated in mitomycin-C challenge models. The diuretic effect is attributed to flavonoids increasing glomerular filtration rate without significant electrolyte loss, a mechanism underpinning German Commission E approval for irrigation therapy in urinary tract conditions.

## Clinical Summary

German Commission E has approved Betula pendula leaf for use as an irrigation therapy in bacterial and inflammatory urinary tract conditions, based on its established diuretic and [anti-inflammatory](/ingredients/condition/inflammation) profile, though large randomized controlled trials remain limited. In vitro studies using human lymphocytes demonstrated that aqueous leaf extract at concentrations of 0.5–5% v/v produced statistically significant antigenotoxic effects against mitomycin-C-induced DNA damage, suggesting [antioxidant protection](/ingredients/condition/antioxidant) at the cellular level. Animal studies using Wistar rats showed that oral administration of 200 mg/kg extract improved spatial memory performance and reduced markers of oxidative stress in hippocampal tissue, providing preliminary [neuroprotective](/ingredients/condition/cognitive) evidence. Overall, the evidence base is strongest for diuretic and anti-inflammatory applications, while antigenotoxic and neuroprotective findings remain preliminary and require human clinical validation.

## Nutritional Profile

Betula pendula (Silver Birch) leaves and bark contain a range of bioactive compounds with limited conventional nutritional data, as it is used primarily as a medicinal herb rather than a food source. Key constituents include: Flavonoids - hyperoside (quercetin-3-galactoside) at approximately 1.5-3.5% dry weight in leaves, myricetin, luteolin, and kaempferol glycosides; Triterpenes - betulin (up to 22-35% in outer bark dry weight), betulinic acid (0.1-0.5% bark dry weight), oleanolic acid, and lupeol; Phenolic acids - chlorogenic acid, caffeic acid, and protocatechuic acid (combined ~0.5-2% dry weight in leaves); Tannins - primarily condensed tannins (catechins and procyanidins) at approximately 3-10% dry weight; Essential oils in leaves include methyl salicylate, betulenol, and alpha-betulenol (trace to 0.1%); Saponins present in modest concentrations (~0.5-1% dry weight). Birch sap (collected in early spring) contains glucose and fructose (0.5-2% w/v), small amounts of amino acids including glutamine and asparagine, vitamin C (approximately 2-10 mg/100ml), potassium (~100-200 mg/L), calcium (~40-80 mg/L), magnesium (~10-30 mg/L), manganese, and zinc in trace amounts. Fiber content in dried leaf material is estimated at 10-20% dry weight. Protein content is low (~5-8% dry weight in leaves). Bioavailability note: betulin has poor oral bioavailability due to low aqueous solubility, though betulinic acid demonstrates somewhat better absorption; flavonoid bioavailability from aqueous extracts is moderate and enhanced by co-ingestion with dietary fats.

## Dosage & Preparation

No clinically studied human dosages available. Preclinical studies used: oral 200 mg/kg body weight daily in rats (15 days), and 0.5-5% v/v aqueous extract in vitro. No standardization protocols established. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Betula pendula is generally well tolerated at therapeutic doses, but individuals with known birch pollen allergy may experience cross-reactive hypersensitivity reactions due to shared Bet v 1 protein allergens present in the leaf. Because of its diuretic properties, concurrent use with prescription diuretics or lithium warrants caution, as enhanced fluid and electrolyte loss may alter lithium plasma concentrations and increase toxicity risk. Irrigation therapy with birch leaf requires adequate fluid intake of at least 2 liters per day and is contraindicated in patients with edema secondary to cardiac or renal insufficiency where increased fluid load is harmful. Safety data in pregnancy and lactation is insufficient, and use during these periods should be avoided without medical supervision.

## Scientific Research

Current evidence is limited to preclinical in vitro and animal studies, with no human clinical trials, RCTs, or meta-analyses documented. Key studies include in vitro [cytokine](/ingredients/condition/inflammation)sis-block micronucleus assays on human lymphocytes and an Aβ1-42-induced Alzheimer's disease rat model (n=28) showing [neuroprotective effect](/ingredients/condition/cognitive)s at 200 mg/kg daily for 15 days.

## Historical & Cultural Context

Betula pendula and related Betula species have been used in European traditional medicine for [inflammatory](/ingredients/condition/inflammation) conditions, particularly arthritis and degenerative joint disease. Historical use spans various Betula species for inflammatory diseases, with some experimental anti-carcinogenic evidence noted in animal studies.

## Synergistic Combinations

Ginkgo biloba, Turmeric, Boswellia serrata, Green tea extract, Vitamin E

## Frequently Asked Questions

### What is Betula pendula used for in herbal medicine?

Betula pendula leaf is approved by the German Commission E specifically for irrigation therapy of the urinary tract, helping to flush out bacteria during mild urinary tract infections and reduce inflammation. Its diuretic action is attributed to flavonoid compounds including hyperoside and quercetin glycosides, which increase urine flow without significantly depleting electrolytes. It is traditionally also used to support kidney function and reduce water retention.

### What are the active compounds in silver birch leaf extract?

The primary bioactive compounds in Betula pendula leaves include triterpenes betulin and betulinic acid, along with flavonoids such as hyperoside, quercetin-3-glucoside, and myricetin derivatives. The bark and leaves also contain methyl salicylate precursors and tannins that contribute astringent and mild analgesic properties. Betulinic acid has attracted particular research interest for its anti-inflammatory and potential anticancer activity via apoptosis induction in tumor cell lines.

### Can Betula pendula protect against DNA damage?

Preliminary in vitro evidence suggests that aqueous Betula pendula leaf extract at concentrations of 0.5–5% v/v demonstrated antigenotoxic effects in human lymphocytes challenged with the DNA-damaging agent mitomycin-C, reducing chromosomal aberrations in a concentration-dependent manner. This activity is believed to be driven by the free radical scavenging capacity of its flavonoid constituents. However, these findings are limited to cell culture models and have not yet been confirmed in human clinical trials.

### Does Betula pendula interact with any medications?

Due to its diuretic effect, Betula pendula may potentiate the action of prescription loop diuretics such as furosemide, increasing the risk of dehydration and electrolyte imbalance. Co-administration with lithium is a particular concern because enhanced urinary excretion can reduce lithium clearance and raise plasma levels toward toxicity. Patients on anticoagulants such as warfarin should also exercise caution, as quercetin-type flavonoids have been shown in some studies to modestly inhibit CYP2C9 enzyme activity involved in warfarin metabolism.

### What dosage of Betula pendula leaf is recommended?

The German Commission E recommends a daily dose of 2–3 grams of dried Betula pendula leaf as an infusion (tea), consumed multiple times throughout the day alongside an intake of at least 2 liters of fluid to support the irrigation effect. Standardized extracts used in research studies have varied, with animal neuroprotection studies employing oral doses of 200 mg/kg, which does not directly translate to a validated human equivalent dose. No universally standardized supplement dosage has been established for non-urinary applications, and consultation with a healthcare provider is advised.

### What does research show about Betula pendula for memory and cognitive function?

Preliminary animal studies indicate that Betula pendula leaf extract at 200 mg/kg may support memory function and reduce markers associated with Alzheimer's disease, including tau phosphorylation and amyloid aggregation in rat models. However, these findings are from preclinical research and human clinical trials are needed to establish efficacy and optimal dosing in people. The neuroprotective potential is promising but should not yet be considered established in humans.

### Is Betula pendula safe for long-term use?

Betula pendula leaf is recognized in WHO/EMA monographs as a traditional herbal medicine, suggesting a long history of use, though comprehensive long-term safety data in humans remains limited. Most traditional use evidence supports short-term applications for diuretic and anti-inflammatory purposes rather than extended supplementation. Anyone considering long-term use should consult a healthcare provider, particularly if taking other medications or managing chronic conditions.

### Which form of Betula pendula is most effective—leaf extract, tea, or tincture?

Research on Betula pendula has primarily evaluated aqueous leaf extracts in laboratory and animal studies, with concentrations ranging from 0.5–5% v/v showing potential antigenotoxic effects. Different preparation methods (tea, tincture, standardized extract) likely vary in compound concentration and bioavailability, but direct comparative studies in humans are lacking. The optimal form and preparation method for human supplementation remain to be established through clinical research.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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