Our Team

Dr. Kimball Lundahl, D.C.

Dr. Kimball Lundahl, D.C.

Vice President of Business Development

After Dr. Kimball Lundahl graduated from Parker College of Chiropractic he has used his education and experience to achieve personal optimal health. For over 30 years he has strived to pass that knowledge on to his patients and clients. His belief in whole body wellness was initially sparked by his father, Dr. Gerald Lundahl, M.D., who inspired him to become interested in the business aspects and design of medically supervised weight loss programs. Together, Dr. Kimball Lundahl and his father Dr. Gerald Lundahl opened medical weight loss clinics in Southern California to combat the growing crisis of obesity. Over the years Dr. Kimball Lundahl has developed a business system, which he continues to fine tune, turning many practices into functional and financially sound businesses. Dr. Kimball Lundahl, completely dedicated to healthy life style changes, puts physical activity and nutrition at the forefront of his own life.

Dr. Joel Yaffa

Dr. Joel Yaffa, M.D.

Hormone Consultant

Joel Yaffa, M.D. graduated from the University of Medicine and Dentistry of New Jersey. He practiced as a family doctor in Southern New Jersey for 12 years. His shift to the Targeted Hormone Balancing method began with a personal medical crisis in his own family. He began researching treatment alternatives and consulted with dozens of physicians across a broad spectrum of medical disciplines. Happily, the medical crisis passed, and Dr. Yaffa was now enriched by the enormous amount of knowledge that he accumulated during that period. As a result, he made a decision to incorporate Targeted Hormone Balancing into his day-to-day medical practice. In addition to being a full-time practitioner of Targeted Hormone Balancing, Dr. Yaffa has become a strong and well known advocate for Bio-Identical Hormone Therapy. In 2008 he organized several “BHRT World Summit” Internet Seminars which brought thousands of participants together with dozens of the most well-known and highly regarded BHRT experts in the world. Dr. Yaffa provides training, mentoring, software and practice-building consulting, to both new and experienced practitioners. He combines his decades of clinical treatment experience with a sophisticated Internet based software system that allows patients to describe symptoms and sets up a feedback-based dialog between patients and medical practitioners.  

Dr. Allan Jeffery

Dr. Allan Jeffery, D.O.

Medical Consultant

Dr. Jeffery brings years of experience as a practicing Physician of Internal Medicine. He has observed first-hand the long-term consequences of an unhealthy lifestyle, treating extremely obese and diabetic patients for many years. Dr. Jeffery’s mantra is profoundly simple: “The lowest dose of the medicine that works is the best dose, but nutrition trumps them all.” Reducing ones dependence on medication is the mission echoed in his practice. In his down-time, Dr. Jeffery travels to South America to complete medical missions.


  • Diplomat of the American Board of Obesity Medicine.
  • American Society of Bariatric Physicians
  • American Medical Association
  • American Osteopathic Association
  • American Academy of Sleep Medicine
  • American College of Osteopathic Family Physicians
  • Board Certified in Internal Medicine

Dr. Lloyd Thompson, M.D.

Dr. Lloyd Thompson, M.D.

Medical Consultant

Lloyd Thompson, MD received a BS in Biology from Lamar University and an MD from The University of Texas. Postgraduate training included Pediatrics, OB-GYN, Internal Medicine, Psychiatry, and Surgery at the Brackenridge Hospital in Austin, Texas. On completion of training he opened The Family Clinic of Beaumont, Texas and began the general practice of medicine and surgery. During those early years he began to realize people suffering Overweight and Obesity need more help than a copy of a low calorie diet and warnings about related health problems. He began to work with a limited number of overweight children and adults. The demand for his help from patient and physician referrals grew rapidly. He began seeing patients in small groups on weekend and evening hours. After 12 years of a large General and a limited Bariatric Medicine practice, he accepted a position as medical director of The Obesity Treatment and Prevention Center of New Orleans. There his work was limited to Bariatric Medicine. On several occasions he was used by The Louisiana State Board of Medical Examiners as an expert on use of appetite suppressant medication. By invitation, he gave lectures to The American Society of Bariatric Physicians, concerning his development of a specific form of group therapy as a part of the medical treatment of overweight adults and children. Presently Dr. Thompson is extremely concerned with the ever-increasing rate of Obesity related deaths in the U. S. and the lack of good nutritional health education of our children. He is near completion of a book he hopes will help.  

Dave Pontious

David Pontious, PA-c

Medical Consultant

Dave Pontious PA-c has worked in weight loss for over 10 years. Initially counseling patients on proper eating and exercise to lose weight, he discovered certain medicines and medical conditions prevent weight loss. Now he helps his clients achieve life altering transformations by treating them with both medical and nutritional means. “There are many reasons a person cannot lose weight. My goal is to evaluate that person as an individual and discover what is specifically stopping them.”


Debra Leonard

Corporate Trainer

Healthy Habits is proud to welcome and introduce our new Corporate Trainer, Debra Leonard. We are delighted to have her part of the Healthy Habits team! Debra has over 10 years’ experience as an Executive Director and has been working closely with Healthy Habits for over 6 years. During her years with multiple clinics she effectively implemented the Healthy Habits’ Medical Weight Loss Business System and has built up a 1.5 million dollar business and it continues to grow.. Debra loves traveling with her family and friends in her spare time. Please contact Debbie at Debbie.l@healthyhabitsmc.com or 412-805-5043.