The ingredient, explained

Henna

Research examined HENNA under the stated study conditions.

BulkingHair dyeingSkin conditioning

Explore connections

Ingredient guide

What it is and what it does

2-Hydroxy-1‚4-naphthoquinone

About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗

Bulking: Changes a product's bulk density.
Hair dyeing: Adds colour to hair.
Skin conditioning: A broad cosmetic role for maintaining skin condition. It does not identify a particular clinical benefit.

Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗

Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.

A closer look

What the research shows

Human topical treatment study

Henna-curcumin ointment did not significantly prevent capecitabine-associated hand-foot syndrome; a post hoc analysis suggested delayed onset.

What this does not tell us

90 randomized over four chemotherapy courses. Co-active curcumin, specific botanical ointment and post hoc timing analysis do not isolate henna benefit. Plant part and extraction are not established in abstract, so applicability is preparation-specific. Pure lawsone is not substituted for henna.

Sources for this summary. PubMed 35320555 ↗

Research review checked Oct 1, 2026

Review supplied candidate titles and available abstracts selectively for exact identity; targeted primary PubMed/publisher searches. This is not an exhaustive systematic review.

Review source 1 ↗

Ingredient research is not proof that a product containing this ingredient works.

Read the 1 selected study

Human topical treatment study · n=90
Topical henna and curcumin (Alpha®) ointment efficacy for prevention of capecitabine induced hand-foot syndrome: A randomized, triple-blinded, placebo-controlled clinical. ↗
Daru : journal of Faculty of Pharmacy, Tehran University of Medical Sciences · 2022

Follow the formula

Products containing this ingredient

All 1 products ↗

From the wider catalogue. Linked by the ingredient list, without an efficacy ranking.

M-61

PowerSpot Cleanse

Cleansers · 24 linked ingredients

Inside the formula

Names and identifiers

Registry identity