E-Liquid Review # 149 - BIO CONCEPT - RED AST - BOOSTER (FR) posted by Einherjar Date:Friday, 19 June 2015 In : News, E-liquid magazines, Magazines / Reviews Leave comments Today we are going back to " Bio Concept »To discover some new e-liquids. First of all the Red Ast, a recipe inspired by a well-known e-liquid and the “ Booster“, Mono-aroma e-liquids embellished with Taurine, Guarana and Caffeine.