 C.J. HuntSelf / Narrator / Main Subject | Self / Narrator / Main Subject |
| LLeslie AielloSelf / President, Wenner-Gren Foundation for Anth. Research | Self / President, Wenner-Gren Foundation for Anth. Research |
| LLoren CordainSelf / Author / Professor of Health & Exercise Science, CO St. U | Self / Author / Professor of Health & Exercise Science, CO St. U |
| MMichael EadesSelf / Author, Protein Power | Self / Author, Protein Power |
| BBoyd EatonSelf / Author, Paleolithic Prescription / Professor, Emory U. | Self / Author, Paleolithic Prescription / Professor, Emory U. |
| JJoel FuhrmanSelf / Center for Nutritional Medicine | Self / Center for Nutritional Medicine |
| DDavid J. GetoffSelf / VP Price-Pottenger Nutrition Foundation | Self / VP Price-Pottenger Nutrition Foundation |
| AAlan GoldhamerSelf / President, Int'l Association of Hygienic Physicians | Self / President, Int'l Association of Hygienic Physicians |
| AAdele Hite MPH R.D.Self / Exec. Dir., Healthy Nation Coalition | Self / Exec. Dir., Healthy Nation Coalition |
| JJean Jacques HublinSelf / Dir., Human Evolution, Max Planck Institute | Self / Dir., Human Evolution, Max Planck Institute |
| MMaria LeungSelf / Founder Tasty Eats Soy Jerky | Self / Founder Tasty Eats Soy Jerky |
| SShannon McPherronSelf / Paleolithic Archaeologist, Max Planck Institute | Self / Paleolithic Archaeologist, Max Planck Institute |
| SSally Fallon MorellSelf / President, Weston A. Price Foundation | Self / President, Weston A. Price Foundation |
| WWilliam RenduSelf / PhD Anthropology Student | Self / PhD Anthropology Student |
| PProfessor Mike RichardsSelf / Head, Archaeological Science Group, Max Planck Institute | Self / Head, Archaeological Science Group, Max Planck Institute |
| GGary J. SawyerSelf / Physical Anthropologist, American Museum of Nat. History | Self / Physical Anthropologist, American Museum of Nat. History |
| BBarry Sears, Ph.D.Self / Author / President, Inflammation Research Foundation | Self / Author / President, Inflammation Research Foundation |
| LLane Sebring, M.D.Self / Board Examiner, American Academy of Anti-Aging Medicine | Self / Board Examiner, American Academy of Anti-Aging Medicine |
| DDr. Marie SoressiSelf / Max Planck Institute for Evolutionary Anthropology | Self / Max Planck Institute for Evolutionary Anthropology |
 Gary TaubesSelf / Science Journalist / Author, Good Calories Bad Calories | Self / Science Journalist / Author, Good Calories Bad Calories |
 Andrew WeilSelf / Director, Center for Integrative Medicine, U.Arizona | Self / Director, Center for Integrative Medicine, U.Arizona |
| RRobb WolfSelf / Author / Former Research Biochemist | Self / Author / Former Research Biochemist |
| JJay Wortman, M.D.Self / Métis Physician / Sr. Health Advisor | Self / Métis Physician / Sr. Health Advisor |
| KKylie Wurl, R.D.Self / Registered Dietician, Sebring Clinic | Self / Registered Dietician, Sebring Clinic |
| SSusan Loraine AndersonRunner | Runner |
| BBen LammYoung C.J. Hunt | Young C.J. Hunt |
| SShelia P. NortonEMT 1 | EMT 1 |
| CClay DavidEMT 2 | EMT 2 |
 Kelly RipaSelf / Talk Show Host | Self / Talk Show Host |
 Michelle ObamaSelf / First Lady | Self / First Lady |
