Die Spirulina-Alge verleiht dem Bier seine blaue Farbe. 
REUTERS
A glass filled with the Line blue beer, which is made with spirulina algae, is displayed on a table inside the Hoppy Urban Brew (HUB) brewery in Roubaix near Lille, France, January 31, 2022. Picture taken January 31, 2022. REUTERS/Ardee Napolitano
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