Meet Our Doctors

stem cells

Dr. Karen Vieira

Biomedical Advisor

Dr. Karen Vieira has a Ph.D. in Biomedical Sciences from the Department of Biochemistry and Molecular Biology at the University Of Florida College Of Medicine, a Master of Science in Management and a Bachelor of Science in Molecular Biology. She has worked in hospitals and clinics conducting clinical research with patients, as well as in biotechnology laboratories, researching the biochemistry and molecular biology of the body, animals and even micro-organisms. This involved both mouse and human stem cell research. ​

Additionally, she worked in the food industry with the largest food company in America where she researched food and supplement ingredients for a variety of health conditions. While there, she also started a comprehensive cell culture research project, a first of its kind there, discovering and prioritizing novel and emerging food ingredients for health and wellness using cell culture studies.

 Karen is the owner of The Med Writers, a company specializing in writing and consulting in the food, supplement, biotech​, pharma and stem cell​ industries. Her passion is discovering existing research on dietary and lifestyle changes,​ plus non-pharmaceutical and non-surgical methods, that prevent, cure or improve various health conditions. Not only does she have knowledge on healthy living, but she personally lives it, inspiring others to do the same. ​Having experienced the power of stem cell injections personally, she is an advocate for stem cells to boost health.

​Most importantly, she has the rare ability to explain the findings of medical research studies in an easy-to-understand way so that anyone can instantly “get it”. Her knack for explaining things gives listeners and readers simple steps on how to apply and use the knowledge in their own life to improve their health. For these reasons and more, Dr. Vieira is currently a popular author, speaker and consultant in the health and wellness industry.

Dr. Chantelle Dufresne

Medical Physician

Dr. Chantelle Dufresne is a residency trained and Board-Certified Emergency Medicine physician by the American College of Osteopathic Emergency Physicians.  Dr. Dufresne is a native to South Florida, born and raised in Fort Lauderdale and continuing her education at the University of Florida for her Bachelor’s Degree.  She attended Medical School at Nova Southeastern University and residency at Saint Lucie Medical Center in Port St. Lucie, Florida.  Dr. Dufresne now works in the local community at several Emergency Departments.  Her specialty encompasses diverse health conditions, including life-saving procedures, joint arthroscopies, and treating a wide variety of musculoskeletal disorders. After working in the Emergency Department for several years, Dr. Dufresne is increasing her focus on the alternative and innovative treatments of autoimmune and orthopedic conditions.  Her goal is to offer additional options for patients to regain function and improve their quality of life through treatments with stem cells.

David Capaldi MD

Chief Medical Officer

Dr. David Capaldi graduated from St. George’s University School of Medicine and completed years of residency training in General Surgery at Nassau University Hospital in New York and in Diagnostic Radiology at John T. Mather Memorial Hospital and Stony Brook University Hospital in New York.  Dr. Capaldi is currently a licensed physician in the State of Florida and in the State of New Jersey.  His diverse training also includes a B.S. in Pharmacology & Toxicology and an MBA in Pharmaceutical Business from the University of the Sciences in Philadelphia.

Dr. Capaldi’s education and experience in radiology and surgery, combined with his interest in using stem cell therapy in the treatment of a variety of medical disorders and traumas have led him to join the staff at Rejuva Stem Cell Clinic as the full time provider.  Dr. Capaldi enjoys the active lifestyle of South Florida, especially surfing and golfing.