Where the price of a formula stops buying performance

This is the least popular article on any beauty desk, because it argues that several categories are solved problems. It is also the one that saves the most money, so here it is by category, with the reasoning attached rather than asserted.

Cleanser: ceiling about 25

A cleanser is on the skin for sixty seconds and then removed. It needs surfactants that lift oil without stripping the barrier and a pH near 5.5. That chemistry is fifty years old, thoroughly commoditised and available at every price point. What more money buys is texture, fragrance and the pleasure of the bottle, which are real but are not performance.

The exception is a cleansing balm or oil used to remove sunscreen and long wear make up, where formulation quality genuinely varies and a bad one leaves a film. Even there the ceiling is around forty.

Moisturiser: ceiling about 40

A moisturiser combines occlusives to slow water loss, humectants to attract water and emollients to smooth the surface. Petrolatum, glycerin, squalane, ceramides, fatty alcohols. All cheap, all well characterised, all doing the same job in a 12 cream and a 300 one.

Above forty you are buying: sensory quality, which is genuinely lovely and genuinely worth paying for if it pleases you; fragrance, which for reactive skin is a cost rather than a benefit; packaging; and marketing, which in this category frequently exceeds the cost of goods by a factor of ten or more. What you are not buying is a different result on the skin.

Nobody has ever been able to identify a 300 moisturiser from a 30 one in a controlled test. Plenty of people can tell them apart with the jar in front of them.

Actives: money is defensible here

This is where formulation is difficult and price tracks something real. A vitamin C serum needs stabilisation, a low pH that does not destabilise the rest of the formula, and packaging that excludes air and light. Those are genuine costs. A well formulated retinoid needs an encapsulation system or a stabilised derivative to deliver a dose without wrecking the barrier. Also a genuine cost.

So the sensible shape of a shelf is inverted from how most people build one: economise on the cleanser and the moisturiser, spend on the two actives and the sunscreen. The usual arrangement does exactly the opposite, with a 200 cream sitting over an 8 serum.

Sunscreen: no ceiling, for an unusual reason

The variable that decides how well a sunscreen works is how much of it you apply, and how much you apply is decided by how it feels. A cosmetically elegant sunscreen that you will use generously every morning outperforms a technically excellent one that you dislike and use sparingly. Paying 40 for a formula you enjoy is straightforwardly rational, even though the filters inside it cost the same as the ones in a 9 bottle.

Fragrance: the ceiling is honest but different

Here price does relate to materials, because natural absolutes, iris root, sandalwood, real oud and jasmine cost genuine money by the kilo. But the relationship is loose: a niche house charging 300 may be using more expensive materials, or may be charging 300 because a smaller production run and a particular shop demand it. Test blind if you ever get the chance. The results are humbling in both directions.

The general rule

Ask what the product has to overcome. If it has to survive in a bottle for a year, cross a barrier at a specific pH and remain stable in light, formulation is hard and money is buying something. If it goes on, sits there and comes off, the chemistry was solved decades ago and the price is buying the experience.

Buying the experience is allowed. It is simply worth knowing that is what is happening.

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