Our Team

Dr. Kimball Lundahl, D.C.

Dr. Kimball Lundahl, D.C.


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 father, Dr. Gerald Lundahl, M.D., started a medical weight loss business with the desire to help people while creating more time to spend with his family. Dr. Kimball Lundahl took his education and knowledge of nutrition and applied it to his father’s business, taking it to the next level. He saw a need to combat the growing crisis of obesity, and was able to build a successful practice that provided quality patient care. Through this experience he has learned there is nothing more gratifying than helping prevent serious diseases and saving lives.

Over the years Dr. Kimball Lundahl goal has been to help other doctors do the same. He has developed a complete business system, and as the President of Healthy Habits, he has helped turn many practices into functional and financially sound businesses.

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


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.