Houseleek (Sempervivum tectorum): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does houseleek work for burns and skin inflammation?

Houseleek contains mucilage, malic acid, and tannins that work together to soothe and heal damaged skin. The mucilage forms a protective barrier over wounds, retaining moisture and promoting healing. Tannins provide astringent and antimicrobial properties, while malic acid may support tissue regeneration. This combination makes the fresh leaf juice effective for minor burns, insect stings, and skin irritations (Evidence Level C, Traditional use).

Does houseleek interact with any medications?

There are no documented drug interactions for topical houseleek use. Since it is primarily applied externally and not absorbed systemically in significant amounts, the risk of interactions with oral medications is minimal. However, if you are using houseleek preparations alongside other topical treatments for the same condition, consult a healthcare provider to avoid potential skin irritation or reduced effectiveness of either treatment.

How do you use houseleek for burns and insect stings?

For burns and insect stings, cut a fresh houseleek leaf and apply the gel-like juice directly to the affected area. The mucilaginous sap can be reapplied as needed throughout the day. For minor burns, apply immediately after cooling the area with water. Traditional use suggests applying the crushed leaf pulp as a poultice for more severe inflammation. Always use fresh leaves for optimal potency (Traditional use, Evidence Level C).

Is houseleek safe to use during pregnancy?

Topical use of houseleek is generally considered safe during pregnancy. The plant has no known toxic effects when applied externally, and there are no documented adverse effects on fetal development. However, as with any herbal preparation during pregnancy, consult a qualified healthcare provider before use. Internal use of houseleek has not been established as safe and should be avoided during pregnancy and breastfeeding.

What is houseleek used for medicinally?

Houseleek is traditionally used for treating minor burns, insect stings, wounds, and skin inflammations. The fresh leaf juice is applied topically to soothe irritation and promote healing. It has also been used traditionally for wart removal and as ear drops for ear infections. Historically, the plant was grown on rooftops across Europe to ward off lightning and fire, earning it the common name 'thunder plant' (Traditional use, Evidence Level C).

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 27 PubMed articles · model: gemma4:31b

Summary

Sempervivum tectorum (houseleek) is a succulent perennial plant from the Crassulaceae family used in folk medicine for its antioxidant and antimicrobial properties [PMID:40292572, PMID:37104420].

Background

Houseleek is an evergreen succulent plant widespread in Mediterranean countries [PMID:31168900, PMID:38672344]. It is a CAM plant adapted to survive harsh environments and extreme drought stress [PMID:37364405, PMID:40749090].

Traditional uses

Traditionally used as a refrigerant and astringent for ear inflammation, ulcers, skin rashes, wounds, sores, burns, and abscesses [PMID:31168900, PMID:26551879]. It has also been used as a household remedy for ocular inflammations [PMID:7421015] and as a tea for ulcer treatment [PMID:26551879].

Active compounds

The plant contains phenolic compounds, including flavonol glycosides (specifically kaempferol and kaempferol-3-glucoside), hydroxy-benzoic and hydroxy-cinnamic acids, and proanthocyanidins [PMID:12696970, PMID:22785376, PMID:37104420]. It also contains non-volatile carboxylic acids such as isocitric, citric, malic, and succinic acids [PMID:24522902].

Mechanism of action

The plant exhibits antioxidant activity through radical scavenging, specifically reducing free radical activity in liposomal systems via kaempferol and kaempferol-3-glucoside [PMID:12696970, PMID:37269574]. It also demonstrates membrane stabilizing effects on the hepatic microsomal mixed-function oxidase system in hyperlipidemic models [PMID:11091002].

Clinical evidence

Evidence DBacterial Infections (Otitis Externa)

Ethanolic extracts showed broad-spectrum antimicrobial activity against Gram-positive (S. aureus) and Gram-negative (P. aeruginosa) strains isolated from canine ear swabs [PMID:37104420].

Evidence DPain/Nociception

Intraperitoneal injection of a high dose (1000 mg/kg) significantly increased paw withdrawal latency in inflamed paws of rats [PMID:14595582].

Evidence DAluminum Toxicity (Male Rats)

S. tectorum extract was assessed for protective effects on reproductive biomarkers in male rats exposed to aluminum [PMID:38672344].

Evidence DHyperlipidemia/Heavy Metal Excretion (Rats)

Administration of extract in hyperlipidemic rats increased the excretion of aluminum, boron, and barium into the bile fluid [PMID:14713548].

Evidence DWound Healing

Purified fractions were investigated for potential wound healing activity and cell proliferation using HCT 116 cells [PMID:31168900].

Evidence summary

The current evidence is primarily based on in vitro studies, animal models (rats), and ethnobotanical surveys. There are no human clinical trials provided in the source material.

PubMed sources

1.PMID: 40292572 (2025) — Influence of location and season on phenolic composition and antioxidant activity of Sempervivum tectorum. · Natural product research
2.PMID: 37104420 (2023) — Antimicrobial Activity of Sempervivum tectorum L. Extract on Pathogenic Bacteria Isolated from Otitis Externa of Dogs. · Veterinary sciences
3.PMID: 12696970 (2003) — Antioxidant activity of Sempervivum tectorum and its components. · Journal of agricultural and food chemistry
4.PMID: 22785376 (2012) — Characterization of phenolic compounds and antinociceptive activity of Sempervivum tectorum L. leaf juice. · Journal of pharmaceutical and biomedical analysis
5.PMID: 37269574 (2023) — Assessing radical scavenging capacity of Sempervivum tectorum L. leaf extracts: An integrated high-performance thin-layer chromatography/in silico/chemometrics approach.

Houseleek

Sources & Citations

Calculate a safe dose of Houseleek