Medical Advisor

Grant Tinsley, Ph.D., CSCS,*D, CISSN

Dr. Grant Tinsley is a tenured associate professor at Texas Tech University and the director of the Energy Balance & Body Composition Laboratory. He has published more than 75 peer-reviewed journal articles in intermittent fasting, body composition assessment, and sports nutrition. He is also a certified strength and conditioning specialist and a certified sports nutritionist.


  • Oklahoma State University, BS
  • Colorado State University, MS
  • Baylor University, PhD
  • Stanford University, Medical Statistics Certificate


  • Certified Strength & Conditioning Specialist, with distinction (CSCS,*D)
  • Certified Sports Nutritionist (CISSN)

Professional Accomplishments

  • Principal investigator for 13 externally supported research projects
  • 2021 recipient of the National Strength and Conditioning Association Nutritional Research Achievement Award
  • 2019 recipient of the Texas Tech University Alumni Association New Faculty Award
  • 2018 recipient of the Best Paper Award from the European Journal of Sports Science



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