Plant Extract - Phytotherapy

Linden Sapwood

The wood of life: Hepatobiliary drainer, choleretic, and stone-dissolving agent

Latin name

Tilia Vulagris

Family

Malvaceae (Tiliaceae)

History & Botany

The linden tree is a majestic tree found in the temperate forests of Europe and Asia, capable of living for several centuries and reaching 40 meters in height. While linden flowers are universally known for their use in sedative and anxiolytic teas, the sapwood (the living wood located between the bark and the hard heartwood) is a phytotherapeutic drug with radically different properties, long underrecognized in France. Linden sapwood has been used for centuries in the folk medicine of the Balkans and Central Europe for its diuretic, choleretic, and stone-dissolving properties.

In France, its rediscovery is linked to the work of Dr. Henri Leclerc in the early 20th century, followed by the popularization of sapwood-based cures by thermal stations (notably Vichy) to drain the liver and gallbladder. The sapwood of silver linden (Tilia tomentosa) is considered the most active. Contemporary phytotherapy regards it as one of the reference plant-based hepatobiliary drainers.

Morphology & Sapwood Identification

Large deciduous tree with a straight trunk, asymmetrical cordate and toothed leaves, dark green on top, glaucous and downy underneath. Cream-white, highly fragrant flowers in small pendulous cymes with a characteristic bract. The sapwood is harvested by bark stripping from 3- to 5-year-old branches in winter or spring.

Part Used & Extraction

The sapwood (inner wood of young branches), harvested from Tilia tomentosa, primarily in Bulgaria, Romania, and Yugoslavia. Dried and subjected to prolonged decoction or hydro-alcoholic extraction. Traditional decoction: 40 g in 1 liter of water, boil for 15 minutes.

Tilia Vulgaris

Sapwood of young branches, reference phytotherapeutic drug

Active Principles & Biochemistry

Organoleptic Properties

Appearance

Dry sapwood

Chips or sticks of light cream to pale beige, fibrous, slightly shiny. Powder: cream to light beige, fine, slightly fibrous to the touch.

Color

Extract / decoction

Decoction: yellow-brown to golden brown, translucent. Dry extract: pale yellow-brown powder. Very light color compared to other wood extracts.

Odor

Dry sapwood & decoction

Mild and pleasant, slightly woody, honeyed, and herbal. Subtle floral notes reminiscent of linden flowers. No strong or unpleasant odor.

Taste

Decoction / extract

Mild, slightly sweet, and woody, with a slight astringency. Honeyed floral notes similar to linden flowers. Generally very well accepted, pleasant as a warm decoction.

Solubility

Dry extract

Very good solubility in hot water (decoction). Mucilages give the decoction a slight viscosity. Good hydroalcoholic solubility for the standardized extract.

Medicinal Properties & Traditional Use

Hepatobiliary Drainage

Farnesol stimulates bile production and flow, facilitating fat digestion and reducing the risk of bile stasis. Indicated for biliary insufficiency, fatty dyspepsia, postprandial heaviness, morning nausea, and biliary migraines.

Gallstones & Cholesterol

Sapwood thins the bile and contributes to the gradual dissolution of small cholesterol gallstones (non-calcified lithiasis). Reduces cholesterol levels and the risk of new stone formation. Indicated for preventive cures in predisposed individuals.

Arthritism & Uric Acid

The diuretic and draining action promotes the elimination of uric acid and catabolic waste. Useful in gout, crystal tendinopathies, hyperuricemia, and chronic rheumatism linked to metabolic congestion.

Hepatoprotective & Antioxidant

Flavonoids (quercetin, tiliroside) protect hepatocytes against toxic aggression (alcohol, drugs, pollutants) and oxidative stress. Supports liver regeneration during detoxification cures. Useful in preventing mild hepatic steatosis.