T. Colin Campbell

Richard Doll

饰：Himself - epidemiologist

Gidon Eshel

饰：Himself

Rebecca Goldburg

饰：Herself

Richard Peto

饰：Himself

Yvonne O'Grady

Anthony Yen

Anthony Yen

饰：Self

Caldwell Esselstyn Jr.

Caldwell Esselstyn Jr.

饰：Self (Cleveland Clinic)

彼得·辛格

Peter Singer

饰：Self (professor of bioethics)