How to read an ingredient list — and spot a token dose

Science · 6 min read · May 2026

The list is ordered, and that's the whole trick

Ingredients are listed in descending order of concentration, down to 1%. Below 1%, they can appear in any order the brand likes. That single rule gives you most of what you need: if the hero ingredient on the front of the box appears after the fragrance and the preservatives, it is present in a quantity that will do very little.

This is called label dressing — including a trace of a well-known active so it can be named on the packaging. It is legal, extremely common, and the main reason two products with apparently identical ingredient lists perform completely differently.

Finding the 1% line

You can estimate it. Preservatives such as phenoxyethanol are legally capped at around 1%. Fragrance, and thickeners like xanthan gum, are almost always used below 1%. Once you spot one of those, assume everything after it is present in trace amounts.

So: a serum listing niacinamide third, before the preservative, is a niacinamide serum. One listing it after phenoxyethanol, xanthan gum and fragrance is a serum with a niacinamide claim on the box.

Percentages, and when they're meaningless

A stated percentage is more useful than none — but only against a known effective range. Niacinamide has good evidence at 2–5%; 10% adds little and irritates more. Alpha arbutin is supported at 2%. Salicylic acid works at 0.5–2%. A product advertising 20% niacinamide is not four times better than one at 5%. It's a marketing number.

And percentage without form tells you little. 20% of a stable vitamin C derivative and 20% of pure L-ascorbic acid behave completely differently — in potency, in tolerance, and in how long they survive an Indian summer in your bathroom.

Six things worth noticing

• Alcohol denat high on the list. Fine in a sunscreen for texture; a problem in a toner used twice daily on dry skin.
• Fragrance or parfum in a leave-on product. The most common cause of contact reactions in products worn all day.
• A very long list with a dozen extracts, all after the preservative. That's decoration.
• No ingredient list at all, or one only in an image on a marketplace listing. Walk away.
• Fairness or whitening claims without a full list. Steroid and mercury adulteration in that category is a documented problem in India.
• A short, boring list where the actives sit in the top five. That's usually the good one.

What we'd want you to ask us

Any brand that stands behind its formulations should be able to tell you what's in a product, at what percentage, and why that percentage. If the answer is vague, that's an answer. Our full ingredient rationale sits in the open on this site, product by product, because a claim you can't check is just an advertisement.

DavaniQ products are cosmetic formulations intended to support skin health and appearance. They are not medicines and are not intended to diagnose, treat or cure any condition. If a concern is persistent, painful or changing, please see a qualified dermatologist.