Dr Mark Hyman, who claimed he reduced his biological age by 20 years, brought on as a contributor Dr Mark Hyman, who claimed he reduced his biological age by 20 years, brought on as a contributor Among the new hires at CBS announced by Bari Weiss is a doctor who has claimed that he has reduced his biological age by 20 years with therapies including cold plunges; that cod liver oil can treat autism and that conditions like Alzheimer’s and dementia can be reversed with the kind of nutritional