5 Days Deo

5 Days DEO is a Danish deodorant brand based in Helsingør and run by the company 5days deodorant international [1]. It is built around a single idea: a roll-on whose effect is meant to last for several days at a time, marketed under the promise of up to five days of odour control from one application. The brand sells a small range of products for men, women, and the feet and body, and its founder traces development of the formula to 2008 [1].

The brand positions its approach against conventional deodorants. Rather than perfuming sweat or blocking the pores, it says it works by neutralising the skin bacteria that cause body odour. The company is still active: the deodorant is stocked by the Danish retail chain Matas and sold through the brand's own online shop in several other European countries.

The product was created by Claus Greiffenberg, who trained as a chiropractor and finished his studies in 1996 before taking further courses in human health and the body [1]. According to the company, his interest in the problem grew out of a simple observation made during his studies — that many deodorants rely on harmful chemicals to suppress odour — which led him to ask whether the same result could be reached another way.

The brand credits the eventual formula to a family influence. Greiffenberg's grandfather was a pharmacist who made his own ointments for skin complaints, designed to neutralise the environment in which bacteria thrived. The company describes the deodorant as an extension of that thinking applied to the sweat glands: if the bacteria could be neutralised, it reasoned, sweat itself would remain odourless.

The work that became 5 Days DEO began in 2008, according to the brand's own account [1]. A retailer listing at Matas instead states that the product has been available on the Danish market since 1996 [5]; the brand site indicates that 1996 was the year the founder completed his chiropractic studies, and that the product only launched commercially in 2010, which suggests the earlier date is a conflation rather than a separate founding year.

5 Days DEO reached shop shelves in 2010, when it was listed by Matas, described by the company as the largest cosmetics retail chain in Denmark [1]. The brand says the product gained a following quickly after that launch. From its Danish base it later expanded its reach, and the deodorant is now offered through the brand's e-shop in Slovakia, the Czech Republic, Poland and Germany in addition to Denmark [1].

The brand's central claim is that sweat has no smell of its own, and that body odour comes instead from bacteria on the skin that break the sweat down. On that basis, the company says its formula targets and neutralises the bacteria in the sweat glands, preventing them from reproducing, so that odour is held off for up to five days from a single evening application. The brand states the effect persists through washing, describing it as fully effective even after a bath [2].

The product is presented as a gentler alternative to stronger antiperspirants. The company contrasts it with high-aluminium products that it says can irritate the skin. The formula is not aluminium-free, however: a product page lists a small amount of aluminium, around 0.7%, alongside water and alcohol. The brand's stated claims are that the product is free of parabens and added fragrance [4][2], rather than free of aluminium. It also notes that alcohol is the one ingredient likely to provoke a reaction and advises against use by people with an alcohol allergy.

The company frames its wider ambition in broad terms, saying it wants 5 Days DEO to become a worldwide brand and that a life without sweat odour is something everyone deserves.

The line is compact. It centres on 5Days DEO for Men and 5Days DEO for Women, both 30 ml roll-ons, together with 5Days DEO Feet and Body, a 30 ml spray. The company notes that the men's and women's versions share the same composition and differ only in colour coding, offered separately because many buyers prefer products presented by gender.

Alongside the active formula, the brand lists three ingredients it describes as skin-protective: glycerine, propylene glycol and allantoin. It advises applying the deodorant in the evening to clean, dry skin before sleep, with two consecutive nights for first-time use, and says one roll-on lasts a long time per application. The company reports that 90% of its customers say the product lasts exactly five days [4].

On testing and approval, the brand says the formula was certified by the Danish asthma and allergy association, Astma Allergi Danmark, and that it received the highest score from the Danish consumer council's chemical assessment, "Tænk Kemi" [2]. These approvals are stated by the company and echoed by the Matas listing, which also marks the product as fragrance-free and suitable for sensitive skin [5].

5 Days DEO remains active as of 2026. It is a small, single-product Danish brand with three listed items, sold through Matas in Denmark and through the company's own online shop in Slovakia, the Czech Republic, Poland and Germany [1]. The Matas page carries more than a hundred customer reviews, and the brand's website remains online, though it is dated and limited in scope. Matas catalogues the deodorant under the series name "Safety5"; the consumer-facing brand name remains 5 Days DEO [5].