There is a lot of debate about supplements. Some health professionals claim they are essential to make up for the fact that most of us aren’t eating enough fruit and veg. Others say that supplement pills do nothing and you’re wasting your money. So what’s the truth?

Kimberley Wilson, a psychologist with a master's degree in nutrition, looks at how multivitamins affect our brain, body and behaviour – and why it really matters who is taking them.

Written and presented by Kimberley Wilson
Animation by Calum Youngson
Commissioned by Camelia Sadeghzadeh

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