John Keith Nichols, M.D. is the Medical Director and CEO of Tier 1 Health and Wellness, the premier preventive medicine clinic in the Southeast. He and his wife, Angie, have developed an evidence-based program dedicated to promoting optimal mental, physical and sexual health throughout the aging process. Dr. Nichols is an author and a highly revered international speaker who has become internationally recognized as a leader in the emerging field of endocrine disrupting chemicals and their effect on androgen receptors as part of his work at Tier 1 Center for Research with Dr. Scott Howell. He is board certified in physical medicine and rehabilitation and is well known for his skill and expertise in the areas of interventional spinal procedures. Dr. Nichols is a graduate of the Medical College of Georgia in Augusta, Ga. He completed his residency training at the University of Louisville in Louisville, Ky.