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Favourite investigations. Jimmy Doherty finds out what gives piquanté peppers their sweetness. And Kate Quilton investigates potentially dangerous levels of mercury in tuna fish.
Jimmy Doherty visits Spain to ask how much orange is in orange squash, Matt Tebbutt runs across a pond of custard, and Kate Quilton lifts the lid on Marmite
Favourite investigations. Matt Tebbutt visits China, the world's biggest oyster producer. Jimmy Doherty looks at dry gin. Kate Quilton asks if herbal bedtime teas can help you nod off.