However, the effectiveness of decanting is a topic of debate, with some wine experts such as oenologist Émile Peynaud claiming that the prolonged exposure to oxygen actually diffuses and dissipates more aroma compounds than it stimulates, in contrast to the effects of the smaller scale exposure and immediate release that swirling the wine in a drinker's glass has.  In addition it has been reported that the process of decanting over a period of a few hours does not have the effect of softening tannins. The softening of tannins occurs during the winemaking and oak aging when tannins go through a process of polymerization that can last days or weeks; decanting merely alters the perception of sulfites and other chemical compounds in the wine through oxidation, which can give some drinkers the sense of softer tannins in the wine.  In line with the view that decanting can dissipate aromas, wine expert Kerin O'Keefe prefers to let the wine evolve slowly and naturally in the bottle, by uncorking it a few hours ahead, a practice suggested by wine producers such as Bartolo Mascarello and Franco Biondi Santi . 
A stylish venue, with an urban feel, the reclaimed wood bar sits proudly surrounded by exposed brick walls. Wine is the specialty at The Decanter, who has used expert wine suppliers to create a wine list to wow the people of Leeds. You can expect aromatic and zesty white wines, rich and luxurious reds, to crisp and fruity rose’s, sourced from the finest vineyards from all corners of the world. Along with all of your favorites, you will also find lots of wines on the list that are more adventurous! Aimed to widen your knowledge and taste buds, the menu will guide you to alternatives of your favorite tipple! The Decanter are proud to boast the largest ‘by the glass’ wine list in the city, which allows you to enjoy a variety of amazing wines, at great prices!