Personal care · lesson 5 of 10
Reading a label
Ingredient order, the Drug Facts box, allergens, and the marketing words with no legal meaning.
7 min read · reviewed October 2026
The back of the pack is the real product
The front of a pack is advertising. The back — the ingredient list, and on some products a Drug Facts panel — is regulated. Three rules get you most of the way:
- Ingredients are listed in descending order of concentration, using standardized INCI names (Aqua is water, Parfum is fragrance, Tocopherol is vitamin E).
- At 1% or less, order is free. An extract listed after the preservatives is likely present in tiny amounts, whatever the front of the pack implies.
- In the US, sunscreens, antiperspirants, acne treatments and anti-dandruff products are OTC drugs. Their active ingredients and percentages must appear in a Drug Facts box — the one place a concentration is legally required.
At or below what concentration may ingredients be listed in any order on US and EU cosmetic labels?
Somewhere between 0 and 10 %.
Reveal the answer →
1%
Above 1%, the order follows concentration; at 1% or below, manufacturers can list ingredients in any order. A handy landmark: preservatives such as phenoxyethanol are typically used at 1% or less, so anything listed after them is probably present in very small amounts.
Words that sound regulated but aren't
No legal definition in the US or EU. Each retailer or brand writes its own list of excluded ingredients, usually based on hazard rather than dose.
No legal definition for cosmetics in the US. Everything, including water, is a chemical — and 'natural' ingredients like essential oils are common allergens.
FDA tried to define it in the 1970s, and a federal appeals court struck the rule down in 1977. FDA says there are no federal standards: it means whatever the company wants it to mean.
No standard for how many dermatologists, what test, or what result was required. It can mean a small, company-run panel.
Often a small company-sponsored study with self-reported results, such as a percentage of users who 'felt' smoother skin. Look for how many people, for how long, whether there was a comparison group, and whether outcomes were measured rather than self-rated.
No required test behind the claim in the US. A hint at best — your own skin is the real test.
The USDA organic seal on a cosmetic means its agricultural ingredients were certified to USDA standards; the word alone is harder to verify. Either way, organic says nothing about safety or effectiveness.
Fragrance is a black box
'Fragrance' or 'Parfum' can stand for dozens of undisclosed components, and US labels can list it as a single word. The EU requires specific fragrance allergens to be named on the label above small thresholds — about two dozen for years, expanding to more than 80 under a 2023 rule that phases in from July 2026. If you react to many products, fragrance is one of the first things to rule out.
Contact allergens worth recognizing
- Fragrance, including 'natural' essential oils (lavender, tea tree, citrus), and named allergens such as linalool, limonene, geraniol, citronellol, eugenol and cinnamal — some become more allergenic once oxidized by air.
- Preservatives: methylisothiazolinone (banned from leave-on cosmetics in the EU since 2017 after a surge in allergy cases) and formaldehyde releasers such as DMDM hydantoin, quaternium-15, imidazolidinyl urea and diazolidinyl urea.
- Hair dye: p-phenylenediamine (PPD) — also found in illegal 'black henna' temporary tattoos, which can cause severe reactions and lifelong sensitization.
- Others: cocamidopropyl betaine (a foaming agent, largely via impurities), lanolin, propolis, and some sunscreen filters such as oxybenzone and octocrylene.
Once you're allergic to something, it's usually for life. Avoidance is the treatment, which is why reading the list matters.
A moisturizer says 'hypoallergenic' and 'dermatologist tested'. What does that guarantee?
- It passed a standardized FDA allergy test
- It contains no fragrance or common allergens
- Nothing specific — neither term has a legal standard in the US
- A dermatology panel approved it as safe for eczema
Show the answer →
C.Nothing specific — neither term has a legal standard in the US
Neither claim has a federal definition or required test. A 'hypoallergenic' product can still contain fragrance or a known allergen. The ingredient list is the only reliable way to check.
Open any product on the personal-care shelf and read its ingredient list: find the first five ingredients, the fragrance, the preservatives, and whether the active is disclosed at a percentage.