Den Os Alcohol-Free Beers

Den Os is a historic Bruges brewery name, revived in 2015 by Anthony Martin of the John Martin group. Its alcohol-free beer, NA Dorst, is a hoppy blond, 0.3% by the brand’s own figure.

Who are Den Os?

Den Os means the Ox, Roger Protz wrote in 2016. The brand site says Den Os was founded in 1765 and “has marked the brewing history of the city of Bruges”; Protz gave 1825. It belonged to the Van Houtryve family and closed in 1957, the site says, and “In 2015, Anthony Martin revived the Den Os brand in the heart of Bruges, supported by the Bourgogne des Flandres brewery”.

Bourgogne des Flandres is in Wollestraat, Bruges, “just a stone’s throw from the original Den Os brewery”, the brand site says, and it continues to produce the Den Os beer that goes into its Bourgogne des Flandres blend. In 2016 Protz described it brewing five to six times a week on a 10-hectolitre plant.

Who owns Den Os?

The John Martin group, the Martin family’s company. According to Wikipedia, the John Martin brewery in Genval was founded in 1909 by the English businessman John Martin (1886–1966), and is “A family company” now run by his grandson, Anthony Martin; it bought Timmermans in 1993 and opened Bourgogne des Flandres in Bruges in 2016. The brand site says Timmermans “is also part of the Anthony Martin group”. Because Den Os belongs to a larger group, we don’t give it our Independent badge. We couldn’t check the group in the company register.

Den Os’s alcohol-free beer

NA Dorst is listed on the brand site as a “HOPPY BLOND NA”, labelled non-alcoholic, top-fermented, with lemon flavours, at 0.3%. “Dorst” is Dutch for thirst (our translation). The brand’s linked shop lists water, hops, malt, yeast, raw grains and barley, and describes a vibrant hoppy character with citrus, pine and floral notes, and “A rather fruity attack, with floral notes giving way to a pleasant bitterness”.

Strength figures differ: the brand site, its linked shop and the Belgian Beer Factory give 0.3%; another Belgian shop, AsterX, gives 0.03%; The Alcohol Free Co and Dry Drinker give none. Nobody says how it’s made or where it’s brewed: the shops variously name Den Os, Bourgogne des Flandres and John Martin as its maker. We found no awards for it, and no calorie figures.

How NA Dorst compares

Alcohol-free Belgian blonds in our directory. Calories as published; checked 31 October 2026. Scores are Unhopped ratings out of 10.

The Den Os beer in our directory

Checked 31 October 2026. Scores are Unhopped ratings out of 10.

Where to buy Den Os

On 31 October 2026 The Alcohol Free Co had NA Dorst at £20.08 for six, or single bottles at £3.51, and Dry Drinker six for £20.08; those are affiliate links. Wise Bartender doesn’t list it. In Belgium, the brand’s linked shop listed 33cl bottles at €1.80, the Belgian Beer Factory at €3.08 and Belgian Beer Heaven at €2.04. For more, see our guide to the best Belgian alcohol-free beer.

Facts checked against the Den Os pages on the Bourgogne des Flandres website, the brand’s linked shop, Roger Protz, Wikipedia, AsterX, the Belgian Beer Factory, Belgian Beer Heaven, The Alcohol Free Co and Dry Drinker, 31 October 2026.