How to read an ingredient list in 60 seconds

What INCI means

Cosmetic labels use INCI — International Nomenclature of Cosmetic Ingredients — a standardised naming system so that the same ingredient is written the same way in every country. It's why you see Butyrospermum Parkii instead of shea butter. The names look clinical; they're just a shared dictionary.

Descending order and the 1% line

Ingredients are listed from most to least, by weight — until you reach roughly the 1% mark, after which they can appear in any order. That's the single most useful thing to know about a label.

• The first three to five ingredients are the bulk of the formula. Water is almost always first in a water-based product.
• Once you hit preservatives, fragrance or a chelator, you're broadly at the tail end — everything after that is in small amounts.
• A hero ingredient near the bottom isn't automatically a problem: many actives are used at fractions of a percent by design.

Function classes worth recognising

• Humectants — glycerin, hyaluronic acid, butylene glycol. They pull and hold water.
• Emollients and occlusives — oils, esters, gel-formers. They soften and slow water loss.
• Actives — peptides, niacinamide, vitamin C derivatives. Usually small percentages.
• Preservatives — phenoxyethanol and friends. Necessary in any water-containing product.
• pH adjusters and chelators — citric acid, sodium hydroxide, EDTA. Housekeeping, not marketing.

Red flags that aren't

A long list isn't a bad list. Preservatives aren't a scandal — an unpreserved water-based product is a genuine hygiene problem. Words you can't pronounce are usually just INCI doing its job. The things actually worth checking are much more personal: added fragrance and essential oils if you're reactive, and any ingredient you've had a reaction to before.

Our list as a worked example

Read the pep patch essence the same way. Water and humectants at the top doing the hydration work, the gel-forming system that makes it a patch rather than a serum, copper tripeptide, and a short preservative system at the end. No added fragrance, no essential oils, no alcohol denat. The full list lives on the ingredients page, unabridged.