# Helichrysum (Helichrysum italicum)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/helichrysum
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-29
**Evidence Score:** 2 / 10
**Category:** European
**Also Known As:** Immortelle, Everlasting flower, Curry plant, Italian strawflower, Mediterranean immortelle, Helichryse italienne, Siempreviva, Perpetua, Elicriso, Zlatnica

## Overview

Helichrysum italicum, the immortelle plant, contains arzanol and flavonoids such as naringenin and kaempferol as its primary bioactive compounds. These molecules inhibit pro-inflammatory enzymes including COX-1, COX-2, and 5-lipoxygenase, driving its [antioxidant](/ingredients/condition/antioxidant) and [anti-inflammatory](/ingredients/condition/inflammation) effects.

## Health Benefits

• [Antioxidant](/ingredients/condition/antioxidant) properties: Preliminary in vitro studies suggest antioxidant effects due to its rich flavonoid content. • [Anti-inflammatory](/ingredients/condition/inflammation) potential: Traditionally used in Mediterranean medicine for inflammatory conditions, supported by animal studies. • [Antimicrobial](/ingredients/condition/immune-support) activities: In vitro assays indicate potential antimicrobial effects, although no human clinical data is available. • [Skin health](/ingredients/condition/skin-health): Used traditionally for skin applications, attributed to its essential oil components. • Potential analgesic effects: Animal studies suggest pain-relieving properties, though human studies are lacking.

## Mechanism of Action

Arzanol, a prenylated phloroglucinol-alpha-pyrone, directly inhibits COX-1, COX-2, and 5-LOX enzymes, suppressing prostaglandin E2 and leukotriene B4 synthesis. Flavonoids including naringenin and kaempferol scavenge [reactive oxygen species](/ingredients/condition/antioxidant) and modulate NF-κB signaling, reducing transcription of [pro-inflammatory cytokine](/ingredients/condition/inflammation)s such as IL-6 and TNF-alpha. Additionally, italicene and neryl acetate in the essential oil disrupt bacterial membrane integrity, contributing to [antimicrobial](/ingredients/condition/immune-support) activity.

## Clinical Summary

Evidence for Helichrysum italicum in humans remains sparse and preliminary. Most data derive from in vitro cell culture assays and rodent models, where arzanol demonstrated dose-dependent inhibition of inflammatory mediators at concentrations of 1–30 µM. One small open-label pilot study examined topical helichrysum essential oil for skin [inflammation](/ingredients/condition/inflammation), but sample sizes were under 30 participants with no placebo control, limiting conclusions. No large randomized controlled trials have evaluated oral supplementation, making clinical efficacy claims premature.

## Nutritional Profile

Helichrysum italicum (curry plant/immortelle) is used primarily as a medicinal/aromatic herb rather than a dietary staple, so macronutrient contribution is negligible in typical usage amounts. Bioactive compounds are the primary nutritional interest: Flavonoids: total flavonoid content estimated at 1.2–3.5% dry weight, dominated by naringenin (up to 0.8% dry weight), isosalipurposide, and apigenin glucosides. Phenolic acids: chlorogenic acid and caffeic acid derivatives present at approximately 0.5–1.2% dry weight. Italicene and neryl acetate are signature volatile terpene compounds comprising 10–30% of essential oil fraction (typically used at <1% concentration in food/therapeutic applications). Arzanol (a prenylated phloroglucinol-pyrone heterodimer) is a key bioactive at approximately 0.1–0.4% in aerial parts — considered the primary [anti-inflammatory](/ingredients/condition/inflammation) agent. Triterpenoids including oleanolic acid and ursolic acid are present at trace levels (~0.05–0.2% dry weight). Essential oil yield is approximately 0.1–0.5% fresh weight. Vitamins and minerals are not significantly documented in literature; fiber and protein content are negligible given typical usage quantities (culinary use as flavoring herb at <1g per serving). Bioavailability note: flavonoids from Helichrysum show moderate bioavailability; arzanol bioavailability in humans has not been formally characterized in pharmacokinetic studies to date.

## Dosage & Preparation

No clinically studied dosage ranges are available for Helichrysum italicum due to the absence of human trials. Preparation ratios for extraction are reported, but lack therapeutic standardization. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Topical application of helichrysum essential oil is generally well tolerated, though contact dermatitis has been reported in sensitive individuals and a patch test is advisable before widespread use. Oral supplementation safety data in humans are insufficient, and high-dose arzanol may theoretically potentiate anticoagulant drugs such as warfarin due to COX inhibition reducing platelet aggregation. Helichrysum should be avoided during pregnancy and lactation given the absence of safety data in these populations. Individuals with allergies to Asteraceae family plants, including ragweed and chrysanthemums, face an elevated cross-reactivity risk.

## Scientific Research

Currently, there are no human clinical trials or meta-analyses available for Helichrysum italicum. The existing studies are primarily in vitro or animal-based, focusing on its [antioxidant](/ingredients/condition/antioxidant) and [anti-inflammatory](/ingredients/condition/inflammation) potential.

## Historical & Cultural Context

Traditionally, Helichrysum italicum has been used in Mediterranean regions, such as Sardinia, for treating [inflammatory](/ingredients/condition/inflammation) conditions through infusions and decoctions. Its historical applications are based on its high flavonoid content.

## Synergistic Combinations

Lavender, Rosemary, Chamomile, Sage, Eucalyptus

## Frequently Asked Questions

### What is arzanol and why is it important in helichrysum?

Arzanol is a prenylated phloroglucinol-alpha-pyrone unique to Helichrysum italicum and considered its most pharmacologically active compound. It simultaneously inhibits COX-1, COX-2, and 5-lipoxygenase enzymes, making it a dual-pathway anti-inflammatory agent unlike many single-target compounds. In vitro studies show arzanol suppresses prostaglandin E2 and leukotriene B4 at micromolar concentrations.

### Can helichrysum oil be applied directly to skin?

Helichrysum essential oil should always be diluted in a carrier oil such as jojoba or fractionated coconut oil at a 1–3% dilution before skin application, as undiluted application can cause irritation or sensitization. A patch test on a small skin area for 24 hours is recommended, particularly for individuals with Asteraceae family allergies. Topical use for bruising and wound healing is common in traditional Mediterranean practice, though robust clinical trial data are lacking.

### Does helichrysum interact with any medications?

Helichrysum's COX-inhibiting compounds may theoretically enhance the effects of anticoagulants like warfarin or antiplatelet drugs such as aspirin and clopidogrel, increasing bleeding risk. Its flavonoid content may also influence CYP450 enzyme activity, potentially altering metabolism of drugs processed through CYP3A4 or CYP2C9 pathways. Anyone taking blood thinners, NSAIDs, or medications with narrow therapeutic windows should consult a healthcare provider before supplementing.

### What is the typical dosage of helichrysum supplement?

No standardized human clinical dosage for oral helichrysum supplementation has been established due to the absence of large clinical trials. Commercial extracts are commonly sold in capsule form ranging from 200–500 mg per serving, often standardized to flavonoid content, but these figures are manufacturer-driven rather than evidence-based. For essential oil use, aromatherapy applications typically involve 3–5 drops diffused in a carrier, while topical blends use a 1–3% dilution in carrier oil.

### Is helichrysum safe during pregnancy?

Helichrysum italicum is not considered safe during pregnancy due to the complete absence of human safety data in pregnant populations and the presence of bioactive ketones such as italidione in its essential oil that may have uterotonic properties. Oral supplementation is particularly inadvisable, and topical essential oil use should also be avoided as a precaution. Nursing mothers should similarly avoid use until adequate safety evidence exists.

### What is the difference between helichrysum oil and helichrysum extract supplements?

Helichrysum oil is typically a concentrated essential oil derived through steam distillation, while extracts are concentrated preparations made using solvents like ethanol or water. Essential oils are more suitable for topical or aromatherapy use, whereas extracts are formulated for oral supplementation and may have better bioavailability for internal health benefits. The active compound profiles can differ between these forms, with some constituents being more concentrated in one form versus the other.

### Is helichrysum safe for children to use?

There is insufficient clinical data on helichrysum safety in children, so use should be approached cautiously and only under professional guidance. Essential oil forms should not be ingested by children due to concentrated potency. If considering helichrysum for a child, consult a pediatrician or qualified healthcare provider to determine appropriate dosing and formulation.

### What does current research show about helichrysum's effectiveness for inflammation?

While helichrysum has been traditionally used for inflammatory conditions in Mediterranean medicine and animal studies suggest anti-inflammatory potential, robust human clinical trials are limited. Most evidence comes from in vitro studies and preliminary animal research, which cannot yet confirm efficacy in humans at therapeutic doses. More rigorous clinical studies are needed to establish the ingredient's true anti-inflammatory effectiveness and optimal application.

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