When a customer wants to push the boat out and buy the best - a premium oil or a favourite fish - how does he or she avoid a fake or low-grade product that has been passed off as top quality? People think they are eating cod - but could it actually be Vietnamese catfish? And what about ham that has never been near a pig or the cheese that is milk-free? The programme reveals how to spot the foods that promise top quality but turn out to be duds. Show less