Why We Will Never Sell You a Tan Extender

Part one

What a tan extender says it does

The promise on the bottle is simple: rub this in after the sun or the sunbed and your tan lasts longer. Some go further and say up to a month longer. It sounds like a separate kind of product, sitting somewhere between after-sun and skincare.

It is not a separate kind of product. "Tan extender" is not defined anywhere in UK or EU cosmetics rules. It is a name on the front of a bottle. Even the American Cancer Society files them under gradual tan moisturisers, "which can also be called tan extenders". To find out what the name means, you have to turn the bottle round.

Part two

What is actually inside them

We checked the ingredient lists of nine products sold in the UK as tan extenders, tan prolongers or tan maintainers, from supermarket after-sun to salon brands to beauty-counter names. They split into two groups, with one outlier.

The DHA group makes you look browner, and that is exactly how it works. DHA is a sugar that reacts with the dead cells on the very outside of your skin and turns them brown. It is the active in almost every fake tan on the market. So a DHA extender is not keeping your tan. It is painting a new one on top of it, and that colour fades in three to ten days as those dead cells come off.

The moisturiser group is exactly that. The ingredient lists read like a body lotion because they are body lotions: water, oils, glycerin, something soothing like aloe or panthenol. None of the four contained an ingredient that does anything to melanin.

If you have followed us for a while, you know where we stand on DHA and bronzers. Nothing in our range contains either, because we would rather build real colour than colour in the outermost layer of dead skin. So a tan extender with DHA is simply not something we will ever put our name on.

Part three

Why nothing can extend a real tan

A real tan, from the sun or a sunbed, is melanin. Cells called melanocytes, deep in the bottom layer of your skin, make it and hand it up to the skin cells above them. Those skin cells then travel slowly to the surface and flake off. When they go, the melanin goes with them.

That journey takes about a month in younger skin, and can stretch to six to eight weeks by your sixties or seventies. It is the reason every tan fades on roughly the same timetable, and the reason every tan needs topping up.

What dry skin does do is shed badly. When skin is dry, the dead cells on top do not come away cleanly. They build up and then come off in clumps. That is what makes a fading tan look patchy, dull or flaky, and it is the one real problem a moisturiser fixes.

Part four

What you are paying for the name

Here is what the products we checked cost per 100ml in September 2026, next to everyday body lotions from the same shops.

To be fair, the cheapest after-sun extenders are priced like a moisturiser, because they are one. The problem is at the other end, where you can pay three or four times more per 100ml for a lotion whose ingredient list is not doing anything a pharmacy body lotion does not.

Some have their own named ingredient blend with a tan-prolonging claim, occasionally "up to a month". Your skin already replaces its surface in about a month, so that particular claim promises very little.

Part five

What actually keeps a tan looking good

None of this costs extra, and none of it needs a new product.

The longer version of all of this is in how long does a tan last, and if it is the colder months, how to keep your tan through autumn and winter.

Part six

Our position

We will never release a tan extender.

If we ever make something to look after your skin between sessions, it will be a moisturiser. We will call it a moisturiser, we will price it like a moisturiser, and it will not have DHA or bronzer in it, because nothing we make does.

That is the same rule we use for everything else in the range: we only release a formula when it does something that is worth paying for, and we only claim what it actually does. A different label on a body lotion does not pass that test.

To be clear about what we are not saying: we are not saying these products are unsafe or breaking any rules. DHA is a permitted cosmetic ingredient, and moisturisers are good for your skin. We are saying that "tan extender" describes a hope, not an ingredient, and you are allowed to check the label before you pay for it.

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