Nearly half of us take a vitamin or mineral supplement every day, but what are these pills sold on every high street actually doing? Digging deeper than the eye-catching words on the packaging, Dr Giles Yeo investigates who really needs a supplement by putting our diets to the test.

我们中近一半人每天服用维生素或矿物质补充剂，但这些药片在每个商业街上都有销售，它们到底在做什么？除了包装上引人注目的文字外，杨博士还通过测试我们的饮食来调查谁真的需要补充剂。