1 Season
4 Episode
- Season 1
Doctors Chris and Xand van Tulleken put competing health theories to the test with the help of 30 other pairs of identical twins.
- Year: 2019
- Country: United Kingdom
- Genre: Documentary
- Studio: BBC Two
- Keyword: health
- Director: Xand van Tulleken, Chris van Tulleken, Lucy Bacon
- Cast: Chris van Tulleken, Xand van Tulleken