What "hypoallergenic" means legally: nothing, and here is why

"Hypoallergenic" is one of the oldest claims in skincare and one of the emptiest. It has no legal definition in the European Union, no legal definition in the United States, and no test a product has to pass before printing it. This post explains what the word can and cannot mean, what the rules around claims actually say, and what our data shows about the products that use it.

What the word claims

Hypo means less. Hypoallergenic means less likely to cause an allergic reaction. Less than what, and measured how, is not specified anywhere. A brand can decide that leaving out one common allergen qualifies, or that a small patch test on 50 volunteers qualifies, or that nothing in particular qualifies. All three are common.

What the EU rules say

The EU does not define the term, but it does regulate claims in general. Regulation (EU) No 655/2013 lays down six "common criteria" that every cosmetic claim must meet: legal compliance, truthfulness, evidential support, honesty, fairness and informed decision-making. A claim has to be backed by evidence the brand can produce if asked.

In 2017 the European Commission published a technical document on applying those criteria, and it addresses hypoallergenic directly. Its guidance is that the claim should only be used where the product has been designed to minimize allergenic potential, that the brand should be able to show this with evidence, and that the claim must not suggest a guarantee against allergic reactions, because none exists. So the word is allowed, on the condition that the brand can defend it. There is still no standard for what "minimize" means.

What the US rules say

The US Food and Drug Administration has said for decades that there are no federal standards or definitions governing the use of the term hypoallergenic, and that the word means whatever a particular company wants it to mean. An attempt to define it by regulation in the 1970s was struck down in court. Nothing has replaced it.

What our data shows

We found 182 products in our data that use the word hypoallergenic on the label or in the product name. Here is how they read:

• 120 of the 182 list Parfum or Fragrance. Fragrance is the single most common cause of cosmetic contact allergy.
• 123 fail our fragrance free check; 56 pass; 3 are not sure.
• Only 4 name one of the EU's 26 listed fragrance allergens, against about half of all scented products in our data. That suggests these brands choose fragrance blends that avoid the listed allergens. It is a real design choice, and it is the best case for the word.

In other words, two out of three hypoallergenic products in our data contain the ingredient category most likely to cause the reaction the word promises to reduce. That is legal, because the claim has no definition, and it is why the word tells you very little on its own. A fragrance blend without the 26 listed allergens is a better bet than one with them, but it is still a fragrance, and the listed 26 are not the only scent molecules people react to.

Examples that use the claim and pass the fragrance free check:

• Neutral Anti-Dandruff Shampoo
• Mevolution Sensitive hand soap, 0 percent perfume

Examples that use the claim and contain fragrance:

• Le Petit Marseillais hypoallergenic shower cream
• Expanscience cleansing milk

What actually reduces allergy risk

Allergy is specific: a person reacts to a particular substance, not to a category of product. The useful information is therefore the ingredient list, not the front of the pack. The most common cosmetic allergens, in rough order of how often they cause reactions in European patch test clinics, are fragrance ingredients, preservatives (especially methylisothiazolinone and formaldehyde releasers), hair dye components, and certain metals in makeup.

So a product that is genuinely designed to reduce reactions tends to look like this on the back: no Parfum, none of the 26 named fragrance allergens, a preservative system based on phenoxyethanol, sodium benzoate or benzyl alcohol rather than isothiazolinones, and a short list overall. None of that requires the word hypoallergenic, and the word does not guarantee any of it.

Related words with the same problem

• Dermatologically tested: a dermatologist was involved in a test. The result is not stated. We have a separate post on this.
• For sensitive skin: no definition.
• Allergy tested: a test happened. Which allergens, on how many people, with what outcome, is not stated.
• Unscented: not the same as fragrance free; may contain a masking scent.

How we check instead

Our fragrance free check reads the list and passes a product only when it contains no fragrance and no listed fragrance allergen doing fragrance work. That is a narrower promise than hypoallergenic, and it is one we can actually keep, because it comes from the label rather than from a claim. Browse the fragrance-free hub if that is the property you care about.

FAQ

Is hypoallergenic the same as fragrance free?

No. In our data most hypoallergenic products contain fragrance. Fragrance free is a checkable property; hypoallergenic is a claim.

Can a hypoallergenic product cause a reaction?

Yes, and the EU guidance requires brands not to suggest otherwise. Any ingredient can be an allergen for someone.

Does "hypoallergenic" mean tested?

Not necessarily. In the EU the brand must hold evidence for the claim, but the type and size of the test are not fixed. In the US nothing is required.

What should I look for instead?

The ingredient list: no Parfum, no named fragrance allergens, and a preservative system without isothiazolinones. Then patch test any new product on your own skin before full use.