Each guide answers one buying question and shows the figures behind the answer.
3 guides
How to choose
A UK cosmetic label carries eight things by law. Here is what each one tells you, and which claims the seller has to be able to prove.
Photo: Pittigrilli · CC BY-SA 4.0 · Wikimedia Commons
Budget and prices
Price per millilitre, a dose in millilitres and the days a bottle lasts. The same four steps can cost £0.94 or £2.44 a day on the same routine.
Photo: Pittigrilli · CC BY-SA 4.0 · Wikimedia Commons
Reactions and irritation
Reactions appear within hours or days, which is what makes a patch test work. How to introduce one product at a time and read the result.
Photo: National Photo Company Collection · Public domain · Wikimedia Commons