• 

  Joe Cordell

  Joe Cordell

  饰：Himself - Calorie Restrictor

• 

  Luigi Fontana

  Luigi Fontana

  饰：Himself - Washington University and Salerno Schools of Medicine

• 

  Valter D. Longo

  Valter D. Longo

  饰：Himself - University of Southern California (as Prof. Valt

• 

  Mark P. Mattson

  Mark P. Mattson

  饰：Himself - National Institute on Aging (as Prof. Mark P. Ma

• 

  Krista A. Varady

  Krista A. Varady

  饰：Herself - University of Illinois at Chicago (as Dr. Krista

• 

  迈克尔·莫斯利

  Michael J. Mosley

  饰：自己