What Does "Natural" Actually Mean in Personal Care?

Walk down any personal care aisle and "natural" is on nearly everything. Soap, shampoo, deodorant, moisturiser. It's on the label, in the name, in the marketing. So it's a fair question: what does it actually mean?

The honest answer is: legally, nothing.

"Natural" isn't a legal term

In the UK, the word "natural" isn't defined or regulated under cosmetics law. Any brand can put it on a label, provided the claim isn't misleading. There's a voluntary industry standard (ISO 16128) that gives a method for calculating what percentage of a formula counts as "natural," but nothing requires a brand to use it, publish the number, or meet any particular threshold to use the word.

So "natural" on a bottle tells you what the brand wants you to feel. It doesn't tell you what's actually in it.

And it doesn't mean safer, either

This is the part that surprises people, including us when we went looking. A major European safety review looked at the substances known to cause skin allergies through fragrance. Of the ones identified, more than half were synthetic. But a substantial number, getting on for a third, were natural extracts. Several from each camp were flagged as high risk for causing sensitisation in the first place.

In other words: natural ingredients can irritate skin. Synthetic ones can too. Being from a plant doesn't make a compound automatically gentle, any more than being made in a lab makes it automatically harsh. Arsenic is natural. So is poison ivy. The word tells you the origin, not the effect.

The label law that's quietly proving the point

Here's something most people haven't heard about yet. EU rules require brands to name specific fragrance ingredients on the label if they're allergens present above a small threshold. Below that, they can just be folded into the word "parfum" (or "fragrance"). That list of named allergens is expanding, from 26 substances to over 80, with the first compliance deadline landing this year.

The expanded rule is EU law, and it applies directly in Northern Ireland too. Great Britain isn't legally bound by it after Brexit, but most brands selling into both markets use the same expanded label everywhere rather than run two versions, so in practice it's fast becoming the standard here as well, just not yet a separate legal requirement of its own.

A lot of the newly added substances are ones naturally found in essential oils. Limonene. Linalool. Geraniol. Citral. Names you'll already find on our own ingredient lists, because we've always named them rather than hiding them inside "parfum."

The direction of travel isn't toward trusting a word like "natural." It's toward naming the actual thing. The law is catching up to something worth doing regardless of what it's called.

What the label still doesn't tell you

Worth being straight about this too: naming an ingredient isn't the same as ranking its risk. The labelling rule is a threshold, not a traffic light. If an allergen is present above the cut-off, it gets named. There's no colour-coding, no "mild" or "high risk" flag next to it. A list with three named allergens isn't automatically safer than a list with ten. It just means you can see what's there.

That's still worth something. You can't make a judgement about an ingredient you're never told about.

So what's the actual point of "natural"?

Not safety. Not effectiveness. Not a shortcut past having to think about it.

The real distinction was never natural versus synthetic. It's hidden versus named. "Parfum" hides ingredients. A vague "natural" claim can do the same job with better marketing. Neither tells you anything you can actually use.

What we can tell you: we don't hide behind "parfum," and we don't give you forty ingredients to wade through either. Short, named, and legible. Not because short automatically means safe, but because a list you can actually read is a list you can actually judge for yourself. That's the bit that was always missing, and it's got nothing to do with whether something grew in the ground or came out of a lab.

Sources

• Cosmetic, Toiletry and Perfumery Association (CTPA), guidance on cosmetic product claims, including the regulatory status of "natural" and "organic."
• ISO 16128 (Parts 1 and 2), guidelines for the technical definition and calculation of natural and organic content in cosmetics.
• Scientific Committee on Consumer Safety, Opinion on fragrance allergens in cosmetic products (SCCS/1459/11), 2012, and associated 2011 review of established contact allergens.
• Commission Regulation (EU) 2023/1545, amending Annex III of Regulation (EC) No 1223/2009 on fragrance allergen labelling.

FAQs

Is "natural" a legally defined term in UK cosmetics?

No. It isn't regulated under UK cosmetics law. Brands can use it freely as long as the claim isn't misleading. There's a voluntary standard (ISO 16128) for measuring natural content, but no brand is required to use it or publish the result.

Does "natural" mean an ingredient is safer or less likely to cause irritation?

Not reliably. Research into fragrance allergies has found natural extracts among the substances most likely to cause skin sensitisation, alongside synthetic ones. Origin doesn't predict effect.

Why do natural products sometimes list chemical-sounding names like Limonene or Linalool?

Because those are the correct names for compounds naturally found in essential oils, and current law requires them to be named individually once present above a small threshold, rather than hidden inside "parfum" or "fragrance." Seeing a scientific-looking name doesn't mean the ingredient is synthetic.

Is a shorter ingredient list always better?

Not automatically safer, no. But it is easier to actually read and understand, which matters if you want to make your own judgement about what you're using rather than trusting a marketing word to make it for you.

What's changing with allergen labelling, and does it apply in the UK?

The list of fragrance allergens that must be individually named is expanding from 26 to more than 80 substances under EU law, with compliance deadlines through 2026 and 2028. It applies directly across the EU and in Northern Ireland. Great Britain isn't legally required to follow it, but most brands use the same expanded label across both markets rather than maintain two versions, so it's fast becoming the practical standard here too. Many of the newly added substances occur naturally in essential oils.

Last reviewed 19 July 2026 by James Allan.