3 Jul 20266 min read

France's top consumer lab just tested 2026's anti-mosquito sprays. The label was the wrong thing to read.

60 Millions de Consommateurs, France's top consumer lab, published its 2026 anti-mosquito spray test on 24 June. The Which? UK test on 1 July and Consumer Reports' US roundup landed on the same point in the same week: the active-ingredient concentration and the re-application interval are the meaningful performance levers. The label, the price tier, and the word 'natural' on the front of the can are not.

Mosticare Editorial
Last updated · 3 Jul 2026
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If you wanted to know which anti-mosquito spray would actually keep the mosquitoes off you this summer, the French consumer-magazine market has a near-perfectly calibrated answer. 60 Millions de Consommateurs, the publication of the Institut National de la Consommation and the most established consumer-test brand in France, has run its 2026 repellent test, and the result is the same one the international consumer-lab literature has been publishing for the last decade: the active ingredient on the back of the can, at the concentration listed, applied at the recommended interval, is the only meaningful performance lever. The label, the price tier, and the word "natural" on the front of the can are not.

The test is not the only one this week. The UK consumer group Which? published its own 2026 repellent test on 1 July, and the US Consumer Reports coverage of 2026 repellents is the de facto US-market reference. All three land on the same point. That is a story in itself, and it is the most useful consumer-protection story the 2026 European market has produced on repellent performance.

What we know

  • 60 Millions de Consommateurs published its 2026 anti-mosquito spray test on 24 June 2026, finding few genuine innovations in the repellent category and widely uneven effectiveness, with no clear "miracle" product.
  • The piece explicitly recommends looking at active-ingredient concentration and re-application intervals as the meaningful performance levers, and explicitly does not recommend brand or "natural" labelling.
  • The UK consumer group Which? published its 2026 repellent test on 1 July 2026, covering 12 mosquito repellents. A £4 supermarket DEET-based spray lasted longest, and a £20 "natural" product offered essentially no protection at the two-hour mark.
  • Consumer Reports' 2026 lab-tested repellent roundup covered lotions, sprays, wipes and plant-based formulations, using live mosquitoes. The test methodology is the most rigorous in the US consumer press.
  • The French, UK, and US consumer-lab results are not in conflict. They land on the same point from three independent methodologies, in three regulatory environments, on three different product mixes.

Three consumer labs, one answer

The reason this is a story and not a coincidence is that the three consumer-lab results are independent. 60 Millions de Consommateurs runs on a French public-broadcaster-funded methodology. Which? is a UK consumer-cooperative with its own lab. Consumer Reports is the US consumer-press gold standard. They do not coordinate, and they do not share test data. The fact that they all land on the same point is the structural fact, and the structural fact is the one to read.

The shared point is the lab-beats-label story. A £4 DEET-based spray from a UK supermarket, properly applied, outlasted a £20 "natural" product in the Which? test. The Which? team was explicit that the "natural" product offered essentially no protection at the two-hour mark. The 60 Millions result is the same shape: the products that performed well were the ones whose active-ingredient concentration and re-application interval were honest. The products that performed poorly were the ones that leaned on the "natural" or "premium" label instead.

The Consumer Reports methodology is the most rigorous of the three, because it uses live mosquitoes in the test chamber. The 2026 roundup covered lotions, sprays, wipes and plant-based formulations. The result list is the de facto US consumer reference. It tells the same story.

What "natural" actually means, on a can

The "natural" claim on a repellent can is not a regulated health claim in the European Union under the Biocidal Products Regulation. It is a marketing label, and the marketing label is not tested in the same way the active ingredient is tested. Plant-based formulations, including citronella, eucalyptus, and soybean-oil derivatives, are tested for skin safety and for efficacy, but the efficacy threshold for a "repellent" claim in the EU is not the same as the efficacy threshold for a "high-performance repellent" claim. A product that meets the first threshold can be sold with a "natural" label and a £20 price tag, and can still offer essentially no protection at the two-hour mark.

The active-ingredient performance story has a structural floor. DEET, picaridin, and IR3535 are the three synthetic active ingredients that have the longest peer-reviewed efficacy record across multiple mosquito genera. They work, and they work at well-characterised concentrations. They are not a barrier on their own. They are a supplement to a barrier. The 60 Millions test, the Which? test, and the Consumer Reports test all confirm that point in the same week.

Where the structural advantage lives

The protection layer that does not depend on a re-application interval, does not depend on a price tier, and does not depend on a "natural" claim is the physical-barrier layer. A treated or untreated mosquito net, fitted correctly in a sleeping room, a window screen in good repair, a long-sleeved layer in the evening: these are the protection layers that do not degrade with the label on the can. They cannot be "out-trained" by mosquito populations that learn to tolerate a chemical repellent over multiple generations. They are also the only protection layer whose cost is paid once, not at the re-application interval.

The recent DEET-conditioning literature is the structural reason the physical-barrier framing is now the more honest one. A 2026 European mosquito population under sustained DEET pressure is not the same mosquito population as the one a 1990s repellent label was tested against. The consumer-lab results this week are the cleanest evidence the 2026 market has produced that the active-ingredient-vs-label distinction is the one to make, and the physical-barrier-vs-supplement distinction is the one that travels further.

What to take to the shop

The consumer-lab results this week, read together, support three practical moves. The first is to read the active-ingredient line on the can, not the marketing label. The second is to apply at the recommended interval, not at the first-bite interval. The third is to put a fitted barrier between you and the night-biting mosquito, because the barrier is the protection layer that does not depend on either of the first two. None of these are new. All three are now independently confirmed by the three most established consumer labs in the European and US markets.

Sources

Published 2026-07-03 · Mosticare Editorial