Will activated charcoal, which these days can be found in everything from face creams to smoothies, really purify your pores? Science presenter and YouTuber Greg Foot is on a mission to bust marketing BS, looking for the facts behind the fads and challenging products’ bold claims with scientific evidence.

In the second episode, Greg is joined by actress and beauty blogger Rebecca Humphries, consultant dermatologist Dr Emma Wedgeworth and Cambridge Professor of Chemistry, Melinda Duer to explore the science behind activated charcoal - could it act as a 'magnet' to draw out dirt and pollution from your pores as some products claim?

Presenter: Greg Foot

Producer: Graihagh Jackson

Studio Manager: John Boland

Editor: Rami Tzabar

The Best Thing Since Sliced Bread is a BBC Science Radio Unit Production