From #1 New York Times bestselling author Dr. Ian K. Smith, a powerful six-week plan to burn fat more efficiently by improving metabolic flexibility. The human body has the amazing ability to switch which fuels it uses for energy based on what fuel is available at the time--researchers...
From #1 New York Times bestselling author Dr. Ian K. Smith, a powerful six-week plan to burn fat more efficiently by improving metabolic flexibility. The human body has the amazing ability to switch which fuels it uses for energy based on what fuel is available at the...