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Fagus sylvatica
CautionRotbuche · (Fagus sylvatica)
Beech family (Fagaceae)
Description
Smooth, silver-grey bark and coppery-red autumn foliage make European beech one of the most recognisable trees of central European forests, where it often forms entire pure beech woodlands. In spring the young, pale-green leaves were traditionally eaten as a wild salad green, while the triangular beechnuts gathered in autumn yield an oil making up roughly 40 percent of their weight. Folk medicine put the bark and leaves to external use for skin problems and brewed them as tea for cold symptoms, though no solid modern evidence supports this. One thing worth knowing: raw beechnuts eaten in quantity contain the irritant compound fagine along with oxalic acid and can cause nausea, vomiting and headaches, so pregnant and breastfeeding women should avoid them. Beechwood tar is strongly irritating and should only be handled by someone experienced with it.
Beech bark decoction was used in European folk medicine for fever, colds, and mild respiratory complaints. The bark contains tannins, catechin, and epicatechin, which act as astringents and have mild antipyretic and antiseptic properties.
Preparation & dosage
Simmer 2–5 g dried beech bark in 250 ml water for 15 minutes, strain. Drink twice daily. For short-term use only.
- Dry amount
- 2–5 g
- Doses per day
- 2×
Young beech leaves were applied in folk medicine as moist compresses to inflamed skin, boils, and poorly healing wounds. The anti-inflammatory properties of fresh leaves are attributed to their flavonoid and phenolic acid content.
Beechwood tar (obtained by dry distillation of branches) was historically used internally as a stimulating expectorant and externally as an antiseptic liniment for skin diseases. The tar contains guaiacol and creosol as active principles. Of historical interest only due to possible toxicity and absence of modern safety data.
Beechnuts have been used as food since antiquity (40% oil, 23% protein, 22% starch). Eat raw only in small amounts — they contain fagine (trimethylamine) and oxalic acid, causing nausea and headaches in larger quantities. Heating (roasting) breaks down fagine; soaking and leaching reduces tannin content for flour production.
Young beech leaves in spring (April–May, before flowering) are edible and mildly sweet. They were used as a salad addition or wild vegetable. In folk medicine they were considered mildly anti-inflammatory and tonic.
Beech bark extract was used in folk healing in antiseptic ointments or oil preparations for skin rashes and toothache. The antimicrobial activity of polyphenols (catechin, epicatechin, protocatechuic acid) against Staphylococcus aureus and Candida species has been confirmed in laboratory studies.
Raw beechnuts are toxic in larger amounts (fagine/trimethylamine, oxalic acid) — nausea, vomiting, headaches. Beechwood tar (creosote) is strongly irritating and must not be used without expert guidance. No internal use of tar preparations without medical supervision. Pregnant and breastfeeding women should avoid raw beechnuts.
⏱ Max continuous use: 2 weeks
Avoid raw beechnuts and tar preparations during pregnancy. No adequate safety profile for medicinal bark applications.
Avoid raw beechnuts and tar preparations during lactation. No safety data for bark extracts.
Children are more sensitive to fagine; strictly limit raw beechnuts. Internal tar applications are contraindicated in children.
Contraindications
- Larger quantities of raw beechnuts (fagine toxicity; especially in children)
- Internal use of beechwood tar without medical supervision
Harvested part: young leaves (spring), beechnuts (autumn)
- Time of day:
- Morning after dew has dried; collect only the most tender, still slightly shiny young leaves.
- Drying:
- Use fresh leaves immediately or dry gently at max. 35 °C. Dried leaves lose aroma quickly.
- Storage:
- 6 months — Dark, airtight and cool; fresh leaves are preferred.
- Time of day:
- Collect beechnuts from the ground after natural fall.
- Drying:
- Air-dry beechnuts for 1–2 weeks. For flour/oil: roast or soak and change water repeatedly (tannin leaching).
- Storage:
- 3 months — Store cool and dry; raw beechnuts spoil quickly.
- CatechinTanninContent: 0,06 %Bark
Dominant polyphenol in beech bark; antioxidant, antimicrobial against gram-positive bacteria and Candida.
- EpicatechinTanninBark
Second most abundant flavan-3-ol in beech bark; strongest antioxidant potential in DPPH assay.
- ProtocatechusäurePhenolic acidBark
Phenolic acid in beech bark; antibacterial, antioxidant.
- ChlorogensäurePhenolic acidBark
Hydroxycinnamic acid ester in beech bark; inhibits α-glucosidase (IC50 38–168 µg/ml) and acts antioxidantly.
- IsoquercitrinFlavonoidBark
Quercetin glycoside in beech bark; detected in all extracts, antioxidant.
- Fagin (Trimethylamin)AlkaloidSeed
Toxic alkaloid in beechnuts; causes nausea and headaches; degraded by heating.
- GuajakolOtherBark
Primary active compound in beechwood tar (creosote); stimulant expectorant, antiseptic — professional supervision required.
- BucheckernölOtherContent: 38–42 %Seed
High-quality edible oil with predominantly unsaturated fatty acids (oleic, linoleic, and linolenic acid); historically used for cooking and as lamp oil.
- [1]MonographTanase et al. (2019): Biological and Chemical Insights of Beech (Fagus sylvatica L.) Bark: A Source of Bioactive Compounds with Functional Properties. Antioxidants 8(9):417, DOI 10.3390/antiox8090417(accessed: 2026-05-22)
- [8]MonographCliniTox Giftpflanzen — Fagus sylvatica L.: schwach giftig (+) (Institut für Veterinärpharmakologie und -toxikologie, Universität Zürich)(accessed: 2026-08-10)
- [2]BookPlants For A Future (PFAF): Fagus sylvatica(accessed: 2026-05-22)
- [3]BookEatweeds: The Traditional and Modern Uses of Beech (Fagus sylvatica)(accessed: 2026-05-22)
- [4]BookPlantura: Beechnuts — ingredients, toxicity and consumption(accessed: 2026-05-22)
- [5]BookNatural Medicinal Herbs: Beech (Fagus sylvatica)(accessed: 2026-05-22)
- [6]WikipediaRotbuche (Wikipedia DE)(accessed: 2026-05-22)
- [7]WikipediaFagus sylvatica (Wikipedia EN)(accessed: 2026-05-22)