[14] In June 2023 the twins were the subject of the BBC genealogy programme Who Do You Think You Are?, in which they learned that they were descended from a wealthy slave-trader who had a plantation in Demerara in The Guianas.

[15] Both Chris and Xand van Tulleken presented Channel 4's Medicine Men Go Wild,[16] and BBC Two's Trust Me, I'm A Doctor alongside Michael Mosley.

[25] Chris van Tulleken was named as an emerging British talent in "The Brit List 2013" by ShortList magazine.

[26] In 2015, the pair presented another Horizon episode, titled Is Binge Drinking Really That Bad?, in which Chris and his identical twin brother Xand tested the effects of drinking moderate amounts of alcohol daily (Chris) and bingeing weekly (Xand).

[28] In 2016, alarmed by the steep rise in prescription medicine in Britain and dubious as to its efficacy, Chris was featured in the BBC One television show The Doctor Who Gave Up Drugs.

[37] On 18 May 2023, Xand married Dolly Theis — the former Conservative Party candidate for Vauxhall in the 2017 general election — in London.