About Us


James D Key , MD

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Dr. Key brings an exceptional range of integrative and complementary medicine disciplines to Fatigue To Fit Center. Dr. Key is a board certified physician, past president of the American Academy of Neurological and Orthopedic Surgeons, University Teaching Fellow and Published Author. His broad based background from surgery, neurogenic pharmacology and bio engineering plus integrative medicine to hormone and neurotransmitter optimization training with American Academy of Antiaging Medicine, makes him uniquely qualified to develop custom individualized treatment plans for Fatigue To Fit Center's patients utilizing the latest state-of-the-art advances, traditional and alternative, in anti-aging, whole mind, body and weight loss solutions.


Dr. Key is a Fellow or Member of more than 20 medical associations in addition to working on more than 20 current and proposed medical, nutrition and science based advanced research projects. His work includes Air Force Flight Surgeon, Space Shuttle Physician as well as working with the National Football League. The Musculoskeletal Performance Laboratory at Harding University is named after Dr. Key. Dr. Key’s strong passion for medicine and his patients well being is evident in his tireless commitment to reviewing and understanding the massive volume of scientific and medical literature and disciplines in the medical, scientific and alternative communities and condensing it down to bring Fatigue To Fit Center’s patients the best possible specific approaches to address their individual needs.


Dorothy Merritt, M.D.

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Dorothy Merritt, M.D. is a board certified internal medicine physician and has been a pioneer in the field of integrative medicine for over three decades. She believes in an approach to medicine that promotes wellness and natural healing by providing the body what it needs nutritionally, but also one that uses pharmaceuticals and invasive treatments, when necessary, to reverse damage already done.


Dr. Gregory N. Mrozinski, FNP, D.C., D.A.B.C.I.

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Dr. Greg Mrozinski is dedicated to providing the Houston region with a natural medicine practice that employs chiropractic methods, nutritional assessment, acupuncture, lab testing, and other alternative medicine means to help you obtain and maintain health. Dr. Greg is a board certified Chiropractic Internist and is skilled in using natural means to address health concerns such as food sensitivities, women's and men's health, obesity, and other internal disorders. He also treats problems within the usual chiropractic spectrum such as sports and back injuries, spinal disorders, and pain management.


Dr. Greg's approach to healing is to teach sustainable methods of achieving health by addressing basic nutritional and physical health issues. Our goal is to teach you to handle your body's individual needs to achieve better control of your wellbeing and equip you to help extend health to others through the spread of awareness and understanding.


  • Doctor of Chiropractic - Texas Chiropractic College
  • Certified Chiropractic Sports Practitioner
  • Acupuncture - 120 hour Certification
  • Peer/Utilization Review - 60 hour Certification
  • Electro Diagnosis - 150 hour Certification
  • Diplomate American Board of Chiropractic Internist
  • Certified Chelation Therapist ACAM
  • President of Holistex Health Center PA

Dasha Mensik - Antiaging Diplomate

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Dasha Mensik , RN, Antiaging Diplomate and Yoga Consultant who has worked in the acute care settings of ICU, CCU, and PACU (post anesthesia recovery unit) for the past nine years as an RN. Discontented with the limited approach of drug based medicine, her main objective is to bring about true healing at the cellular level, the site where all declines in functioning begin.


She is a Diplomate of anti-aging medicine, with American Academy of Antiaging Medicine, an innovative branch of medicine which facilitates true healing and does not just mask symptoms. She is part of the healing team with Dr Jame D key MD, which uses natural healing modalities such as bio-identical hormones, nutrition, and nutraceuticals to bring about cellular healing. She is also a certified yoga instructor and teaches how exercise, stress reduction, and meditation facilitate health restoration.

Dr. Connie J. Grass, D.C.

Dr. Connie Grass, D.C. has been freeing people from pain since 1999 in her clinic in Lumberton, Texas. As a Chiropractor with experience, she is committed to promoting the health and well being of her patients. Whatever Dr. Connie Grass does, she is firm, positive, and enthusiastic in her approach. This energy applied to alternative health care makes its future very bright.


  • Doctorate of Chiropractic, Texas Chiropractic College, Pasadena, TX
  • Bachelor of Science, Human Biology, Texas Chiropractic College, Pasadena, TX
  • Bachelor of Science Nursing, Patty Hanks School of Nursing, Abilene, TX
  • Injectable Nutrients, Division of Postgraduate Studies, Texas Chiropractic College
  • Nurse Practitioner Program, Clinicals pending NCLEX Exam,Samford University Alabama

Honors / Affiliations

  • Omega Psi Honor Society, Texas Chiropractic College, Pasadena, TX
  • Texas Chiropractic College Faculty, Academic Recognition Honors as a Doctor of Chiropractic
  • Texas Chiropractic Board of Examiners, Texas License No. 8350
  • Order of Eastern Star, Silsbee Chapter No. 298, Silsbee, TX
  • Gibson Management Consultants, Chiropractic Consultant, Irvine, CA
  • Lumberton Chamber of Commerce, Lumberton, TX
  • American Chiropractic Association
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