Louis Theroux has fronted some harrowing and unforgettable documentaries over the years.

But even after the first few minutes of Theroux's latest BBC documentary, which aired last weekend, it became clear that this one was going to be particularly difficult to watch. Entitled Drinking To Oblivion, the documentary saw the filmmaker visit the alcoholism unit of King's College Hospital London to meet addicts in the throes of recovery and relapse. It's still available to watch on iPlayer, but be warned: it's a real tear-jerker, and incredibly sobering, if you'll excuse the phrasing. While Louis is his usual candid, funny self, his new piece isn't a laugh-a-minute by any stretch. If you can stomach it long enough though, it might just change your life. https://twitter.com/louistheroux/status/724326943655661569 Particularly striking was Louis' interaction with Aurelie and Joe, two functioning alcoholics and genuinely decent people who struggle daily with alcohol obsession. https://twitter.com/BBCTwo/status/724329587136569345 Even the most ardent non-believer would have to concede after watching this that alcoholism is a major problem in the UK. But is the addiction genetic or learned? Many viewers went on Twitter and other internet comments sections after the show aired to express how much the film is helping them beat their personal demons. By examining the stigma attached to alcohol addiction and the people who suffer from it, the documentary seems to have touched a lot of people online. https://twitter.com/HarryNicholas_/status/724738372716105728 https://twitter.com/NanciVeitch/status/724733699204485120 https://twitter.com/Jesseleanor/status/724343005159784448 https://twitter.com/b0redinbucks/status/724342210569900034 https://twitter.com/DentistWhoRuns/status/724341889537826816 https://twitter.com/veritystockdale/status/724885184865247232 https://twitter.com/nickchef88/status/724904196517060610   [caption id="attachment_55757" align="alignnone" width="694"] via Guardian.com[/caption]   [caption id="attachment_55758" align="alignnone" width="745"] via Guardian.com[/caption]   [caption id="attachment_55759" align="alignnone" width="637"] via Guardian.com[/caption]     The finished film is enough to make you give up the booze for life though. Give it a watch. It's essential viewing for British audiences. This article originally appeared on JOE.co.uk