Helichrysum italicum (Helichrysum italicum): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does helichrysum essential oil work for wound healing?

Helichrysum italicum essential oil promotes wound healing through anti-inflammatory, antimicrobial, and tissue-regenerating actions. Key compounds—neryl acetate, italidiones, and curcumene—help reduce inflammation and oxidative stress while supporting collagen synthesis and cellular repair. The oil's antimicrobial properties help prevent wound infection. These mechanisms are supported by in vitro and animal studies, though human clinical trials remain limited (Evidence Level C). Traditional use strongly supports helichrysum's reputation as a wound-healing agent.

Does helichrysum interact with any medications?

No significant drug interactions have been documented for Helichrysum italicum in current scientific literature. However, theoretical concerns exist regarding concurrent use with anticoagulants, diabetes medications, or drugs processed by liver enzymes, as helichrysum may affect liver metabolism. Evidence remains insufficient to confirm these interactions (Level C). Patients taking prescription medications should consult a healthcare provider before using helichrysum products, particularly for internal use or prolonged topical application.

What is the recommended dosage for helichrysum?

For topical application, dilute helichrysum essential oil to 2-5% concentration in a carrier oil (roughly 10-30 drops per ounce). For internal use as tea, steep 2-4 grams of dried herb in hot water, consumed once or twice daily. These recommendations are based on traditional use rather than clinical trials (Evidence Level C). Always perform a skin patch test before widespread topical application. Consult a qualified practitioner for personalized dosing guidance.

Is helichrysum safe during pregnancy?

Helichrysum italicum is considered unsafe during pregnancy and should be avoided. The essential oil contains compounds that may stimulate uterine contractions or affect fetal development. Insufficient safety data exists for use during pregnancy, breastfeeding, or in children. Women who are pregnant, nursing, or attempting to conceive should not use helichrysum without medical supervision. Those with Asteraceae family allergies should also avoid this herb due to potential allergic reactions.

What are the side effects of helichrysum essential oil?

Helichrysum essential oil may cause skin sensitization, contact dermatitis, or allergic reactions in some individuals, particularly those with sensitive skin or Asteraceae allergies. Undiluted application increases irritation risk. Internal use may cause gastrointestinal upset in sensitive individuals. No serious adverse events have been widely reported, though comprehensive safety studies are lacking (Evidence Level C). Always dilute properly and perform a patch test before use. Discontinue if redness, itching, or rash develops.

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 30 articles PubMed · modèle : gemma4:31b

Résumé

Helichrysum italicum, also known as immortelle, is a Mediterranean shrub used in traditional medicine for its anti-inflammatory, antimicrobial, and antioxidant properties [PMID:34771028, PMID:36833407].

Contexte

Helichrysum italicum (family Asteraceae) is a dwarf aromatic halophyte shrub native to the Mediterranean region, including Sardinia, Corsica, the Iberian Peninsula, the Adriatic Sea islands, and the Balkan Peninsula [PMID:33111574, PMID:39200022, PMID:35761653].

Usages traditionnels

It has a long history of use in the traditional medicine of Mediterranean countries, particularly Italy [PMID:24239849]. Traditional applications include use as an expectorant [PMID:36080283] and for wound healing [PMID:39458638].

Composés actifs

Bioactive constituents include polyphenols, flavonoids, phenolic acids, and carotenoids [PMID:35761653, PMID:37127748]. Essential oils are rich in neryl acetate, alpha-pinene, gamma-curcumene, and italidiones [PMID:33111574, PMID:39200022, PMID:34762977]. Other identified compounds include pyrone derivatives, plant sterols (gamma-sitosterol, campesterol, stigmasterol), and various neryl esters [PMID:30599186, PMID:37107230, PMID:33111574].

Mécanisme d'action

In vitro studies indicate that H. italicum hydro-alcoholic extract upregulates the gene expression of FGF-2 and HAS-2 in dermal fibroblasts [PMID:38407084]. It also demonstrates antioxidant activity via free-radical scavenging [PMID:25766915, PMID:37107230].

Preuves cliniques

Preuve BMetabolic Syndrome (Inflammatory Status)

Daily consumption of H. italicum infusion significantly reduced serum levels of proinflammatory markers and zonulin [PMID:37431025]

Preuve DDiabetic Wound Healing

Topical application of an immortelle essential oil-based ointment or hydrogel showed improved wound closure and tissue regeneration in diabetic rat models [PMID:35429742, PMID:39458638]

Preuve BAcute Post-Viral Cough (Children)

Some evidence from pediatric RCTs suggests efficacy for a multicomponent product containing H. italicum, honey, Plantago lanceolata, and Grindelia robusta [PMID:33938204]

Preuve DRespiratory Tract Pathogens

Essential oil demonstrated antibacterial and biofilm inhibitory activity against Haemophilus influenzae, H. parainfluenzae, Pseudomonas aeruginosa, and Streptococcus pneumoniae [PMID:36080283]

Sécurité et effets indésirables

Clinical trials on internal use provide positive information on the safety profile with no adverse events reported [PMID:34451781]. However, in vitro studies using Allium cepa and human lymphocytes showed that immortelle essential oil increased the frequency of chromosome aberrations and apoptosis [PMID:30607990].

Synthèse des preuves

The evidence consists primarily of in vitro studies, animal models (rats), and a few small-scale clinical trials. While pharmacological activities (antimicrobial, anti-inflammatory) are well-documented in laboratory settings, high-level clinical evidence (Meta-analyses/SRs) is lacking.

Sources PubMed

1.PMID: 24239849 (2014) — Helichrysum italicum: from traditional use to scientific data. · Journal of ethnopharmacology
2.PMID: 36832877 (2023) — Helichrysum italicum: From Extraction, Distillation, and Encapsulation Techniques to Beneficial Health Effects. · Foods (Basel, Switzerland)
3.PMID: 30599186 (2019) — Pyrone derivatives from Helichrysum italicum. · Fitoterapia
4.PMID: 36235438 (2022) — Essential Oil and Hydrosol Composition of Immortelle (Helichrysumitalicum). · Plants (Basel, Switzerland)
5.PMID: 39200022 (2024) — Antibacterial and Antifungal Potential of Helichrysum italicum (Roth) G. Don Essential Oil. · Antibiotics (Basel, Switzerland)

Helichrysum italicum

Sources et citations

Calculer une dose sûre de Helichrysum italicum