Black henna warning: PPD and why it is not henna

“Black henna” is not pure henna; the name usually refers to a product that contains PPD, or p-phenylenediamine.

Pure henna gives red-orange tones, not black. Knowing the difference helps you read product labels and understand why a product sold for skin use is not the same as henna approved for hair.

What “black henna” means

The phrase “black henna” is commonly used for a dark paste applied to the skin, but it does not mean the product is made from pure henna. Such products often contain PPD, short for p-phenylenediamine, a coal-tar hair-dye ingredient. PPD can cause serious skin reactions.

The word “henna” on a label or in a product name is not enough to tell you what is inside. A product may be described as henna while containing other plants or chemicals; pure henna itself does not create a black stain. Treat “black henna” as a warning to check the ingredients rather than as a botanical variety of henna.

Why pure henna is never black

Pure henna comes from Lawsonia inermis and gives red-orange tones. The result can vary in appearance, but pure henna does not produce black. A product claiming to be black, brown or blonde henna contains other plants or chemicals, so the colour name does not describe the effect of pure henna alone.

This distinction matters whether you are choosing a hair colour or looking at a paste marketed for skin. A black result cannot be explained by pure henna. Read the full ingredient list and consider whether the product is intended for hair or skin; do not assume that a familiar name means the formulation is pure.

PPD and the FDA’s position

The FDA says henna is approved in the United States only as a hair dye, not for direct use on skin as body art. The agency’s fact sheet on temporary tattoos, henna and “black henna” also warns that black henna often contains PPD, which can cause serious skin reactions.

This is a specific distinction about intended use: approval for hair dye does not mean henna is approved for direct skin application. A product’s marketing, packaging or use of the word “natural” does not change that. If a paste is being offered for skin decoration, do not treat it as interchangeable with a hair-dye product simply because it is called henna.

How to read the ingredient list

Look for PPD, p-phenylenediamine or para-phenylenediamine in the ingredients. These names refer to the ingredient associated with “black henna” warnings. If the label lists several ingredients, check the whole list rather than stopping at the first mention of henna.

A product name, colour description or claim that a paste is “black henna” does not establish that it contains pure henna. The useful information is the ingredient list and the product’s stated purpose. If the contents are not clearly listed, the label does not give you enough information to confirm that the product is pure henna. Do not infer purity from a natural-sounding description.

Choose products by their stated use

Check whether a product is presented for colouring hair or applying directly to skin. In the United States, the FDA’s stated approval for henna is as a hair dye, not for direct skin use. That difference is particularly important when a product is sold as a paste for body art under the name “black henna”.

For hair, look for a clearly identified ingredient list and follow the product’s directions. Pure henna will not give you black hair colour; a product offering black, brown or blonde results includes other ingredients. If you want to know whether a product is pure, the colour promise alone cannot answer that—check what the label lists.

Testing and what to do if you react

For any hair dye, follow the product instructions for a patch test 48 hours before use, placing it behind the ear or on the inner elbow, and do a strand test on a hidden lock or hair clippings. These checks do not change the FDA’s stated distinction between henna for hair and direct skin use.

If you react, rinse the product off and seek medical help.