# Birch Leaf (Betula pendula)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/birch-leaf
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-05
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Betula pendula, Silver birch leaf, European white birch leaf, Weeping birch leaf, Lady birch leaf, Warty birch leaf, Betulae folium, Birkenblätter, Feuilles de bouleau

## Overview

Birch leaf (Betula pendula) contains bioactive flavonoids including hyperoside, quercetin, and betulinic acid that drive its pharmacological effects. These compounds primarily exert anti-inflammatory and diuretic actions by inhibiting [pro-inflammatory cytokine](/ingredients/condition/inflammation) signaling and modulating T lymphocyte activity.

## Health Benefits

• May reduce inflammation in rheumatoid arthritis by inhibiting T lymphocyte proliferation (45-87% reduction in vitro, comparable to methotrexate) - preliminary evidence only
• Potentially supports [brain health](/ingredients/condition/cognitive) by reducing Alzheimer's-related inflammation and tau phosphorylation in animal models - no human studies
• Traditional diuretic effects recognized by EMA monographs - limited clinical evidence
• May protect against [oxidative stress](/ingredients/condition/antioxidant) by enhancing antioxidant enzymes (SOD, CAT) in preclinical studies
• Shows [anti-inflammatory](/ingredients/condition/inflammation) activity through reduction of TNF-α, IL-1β, and COX-2 in animal models only

## Mechanism of Action

Quercetin and hyperoside in birch leaf inhibit NF-κB signaling and suppress the release of [pro-inflammatory cytokine](/ingredients/condition/inflammation)s including TNF-α and IL-6, reducing T lymphocyte proliferation by 45–87% in vitro. Betulinic acid modulates tau phosphorylation pathways, potentially reducing hyperphosphorylation at Alzheimer's-associated epitopes via inhibition of GSK-3β kinase activity. The saponin and flavonoid content also increases renal tubular reabsorption inhibition, producing a mild aquaretic (water-expelling rather than sodium-expelling) diuretic effect.

## Clinical Summary

Human clinical evidence for birch leaf remains limited; most robust data comes from in vitro and animal studies. In vitro models demonstrated 45–87% reduction in T lymphocyte proliferation, a magnitude comparable to the pharmaceutical immunosuppressant methotrexate, though no direct human trials replicate this finding. Animal models of Alzheimer's disease have shown reductions in tau phosphorylation and neuro[inflammatory](/ingredients/condition/inflammation) markers following betulinic acid administration, but human translation is unconfirmed. The WHO monograph supports its traditional use as an aquaretic for irrigation therapy of the urinary tract based on pharmacological plausibility and historical use rather than large-scale randomized controlled trials.

## Nutritional Profile

Birch leaf (Betula pendula) is not consumed as a food ingredient and thus lacks a conventional macronutrient profile, but contains a well-characterized array of bioactive phytochemicals. Primary bioactive compounds include flavonoids (hyperoside/hyperin at approximately 1.5–4.0% dry weight, myricetin, quercetin, and kaempferol glycosides), hydroxycinnamic acid derivatives (chlorogenic acid, neochlorogenic acid at 0.5–2.0% dry weight), and triterpene saponins (betuloside, monotropitoside). Phenolic acids including caffeic acid and p-coumaric acid are present at trace to low concentrations (0.1–0.5% dry weight). The EMA-recognized diuretic-active fraction is attributed largely to the combined flavonoid and saponin content. Volatile essential oils are present at approximately 0.05–0.1%, containing methyl salicylate, betulenol, and various sesquiterpenes. Tannins (ellagitannins and condensed tannins) contribute roughly 1–3% dry weight. Ascorbic acid (vitamin C) is present in modest amounts in fresh leaves (estimated 50–100 mg/100g fresh weight) but degrades substantially upon drying. Mineral content includes potassium (relevant to diuretic activity, approximately 800–1200 mg/100g dry weight), calcium, magnesium, and silica at lower concentrations. Chlorophyll derivatives are present but not nutritionally significant in typical medicinal doses (2–3g dried leaf as tea). Bioavailability of flavonoid glycosides depends on [gut microbiome](/ingredients/condition/gut-health)-mediated hydrolysis; quercetin from hyperoside shows moderate bioavailability (~25–50% relative absorption). Betulin and betulinic acid, prominent in birch bark, are present only in trace amounts in leaf material.

## Dosage & Preparation

No clinically studied human dosages are available. In vitro studies used 40-160 μg/mL aqueous extract, while animal studies used 200 mg/kg body weight orally for 14 days. Commercial products tested at 0.5-5% (v/v) showed cytotoxicity at higher concentrations (2-5%). Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Birch leaf is generally well tolerated at typical herbal doses (2–3 g dried leaf as tea, 2–3 times daily), with adverse effects being rare and primarily limited to mild gastrointestinal upset. Individuals with known birch pollen allergy should exercise caution due to cross-reactive proteins that may trigger oral allergy syndrome or hypersensitivity reactions. Birch leaf should not be used for urinary tract irrigation therapy in cases of edema due to impaired cardiac or renal function, as increased fluid load may be contraindicated. Drug interactions are not well characterized in humans, but quercetin's known inhibition of CYP3A4 and P-glycoprotein in vitro raises a theoretical concern for altered [metabolism](/ingredients/condition/weight-management) of medications such as cyclosporine or statins; pregnant and breastfeeding women should avoid therapeutic doses due to insufficient safety data.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses on Betula pendula leaf are available in the current research. Evidence is limited to in vitro studies showing T lymphocyte inhibition (PMID: 21619918) and rat studies demonstrating [neuroprotective effect](/ingredients/condition/cognitive)s at 200 mg/kg oral dosing.

## Historical & Cultural Context

Betula pendula leaf extracts have been used in European traditional medicine for rheumatism, osteoarthritis, rheumatoid arthritis, skin disorders, [inflammation](/ingredients/condition/inflammation), and as a diuretic, as documented in ethnopharmacological records and EMA monographs. Usage spans southeastern Europe, including traditional combinations for diabetes management.

## Synergistic Combinations

Quercetin, Willow bark, Turmeric, Green tea extract, Devil's claw

## Frequently Asked Questions

### What is birch leaf used for medicinally?

Birch leaf is primarily used as an aquaretic to support urinary tract irrigation therapy, helping flush the kidneys and bladder without significantly altering electrolyte balance. It is also used traditionally and in preliminary research for reducing inflammation, particularly in conditions like rheumatoid arthritis, where its flavonoids suppress T lymphocyte proliferation in vitro.

### What are the active compounds in Betula pendula leaves?

The primary bioactive compounds in Betula pendula leaves are the flavonoids hyperoside, quercetin, and myricitrin, along with pentacyclic triterpenes such as betulinic acid and betulin, and volatile oils including methyl salicylate. Hyperoside and quercetin are considered the main contributors to anti-inflammatory activity, while betulinic acid is associated with neuroprotective and potential anti-tumor properties in preclinical studies.

### Can birch leaf help with rheumatoid arthritis?

Preliminary in vitro evidence suggests birch leaf flavonoids can inhibit T lymphocyte proliferation by 45–87%, a mechanism relevant to autoimmune conditions like rheumatoid arthritis, with potency described as comparable to methotrexate in cell models. However, no human randomized controlled trials have confirmed this effect in arthritis patients, so clinical recommendations cannot yet be made and it should not replace prescribed disease-modifying therapies.

### Is birch leaf safe to take if you have a birch pollen allergy?

People with birch pollen allergy should use caution with birch leaf products because the leaves contain cross-reactive proteins, particularly PR-10 family proteins related to the major birch pollen allergen Bet v 1, which can trigger oral allergy syndrome symptoms such as itching or swelling of the mouth and throat. Consulting an allergist before use is strongly recommended, and any systemic or severe allergic reaction warrants immediate discontinuation.

### What is the recommended dosage of birch leaf extract or tea?

The WHO monograph for Betula pendula leaf supports an aquaretic dosage of approximately 2–3 grams of dried leaf prepared as an infusion (tea), taken 2–3 times daily, accompanied by adequate fluid intake of at least 2 liters of water per day to facilitate urinary tract irrigation. Standardized extracts vary by manufacturer, and no universally agreed-upon dosage has been established for anti-inflammatory or neuroprotective applications due to the lack of clinical trial data in those areas.

### What does the clinical research actually show about birch leaf for Alzheimer's disease?

Currently, only animal models have demonstrated that birch leaf may reduce Alzheimer's-related inflammation and tau phosphorylation—a hallmark of neurodegeneration. No human clinical trials have been conducted to confirm these effects in people with cognitive decline or Alzheimer's disease. While the preliminary findings are promising, supplementing birch leaf specifically for brain health or dementia prevention cannot be recommended based on available evidence.

### Is birch leaf safe to use during pregnancy or while breastfeeding?

Safety data for birch leaf supplementation during pregnancy and lactation is limited and not well-established. Given its traditional use as a diuretic, which could theoretically affect fluid balance during pregnancy, pregnant and nursing women should consult their healthcare provider before using birch leaf supplements. The WHO/EMA monographs do not specifically address safety in these populations.

### Does birch leaf interact with diuretic medications or blood pressure drugs?

Birch leaf has traditional diuretic properties, which means it may have additive effects if combined with prescription diuretics or medications that affect fluid and electrolyte balance, such as ACE inhibitors or potassium-sparing agents. Anyone taking blood pressure medications, kidney medications, or diuretics should inform their doctor before adding birch leaf supplements to avoid unintended interactions. Medical supervision is recommended to monitor kidney function and electrolyte levels if concurrent use is considered.

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