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Meet the GX Sciences' Team

Our Founder / Chief Science Officer


Dr. Kendal Stewart serves as the current Chief Science Officer (CSO) for GX Sciences, Neurobiologix, and Dr. Neurobiologix. He’s also a member of the American Academy of Anti-Aging Medicine. In addition, he founded and serves as Chairman for the Neurosensory Centers of America.

Dr. Stewart graduated from the University of Texas at Austin with a BA in Biology with Honors as well as a minor in Chemistry. He graduated with a Medical Doctorate from the University of Texas Medical School, where he also received a Distinguished Student of Clinical Medicine Award for the class of 1988. He served as a biomedical research assistant under Takahashi Yamora, PhD, in the Department of Biochemistry and Molecular Biology at MD Anderson Cancer Institute. There, he researched biochemical analysis of surface protein markers in colorectal cancers.

Dr. Stewart completed his residency at University of Texas Houston Affiliated Hospitals and MD Anderson Cancer Institute. During his residency, he received multiple awards, including the Outstanding Clinical Resident Teaching Award in 1993 and the Outstanding Resident Research Award & Scholarship from the Texas Medical Association/Texas Association of Otolaryngology in 1992. He was explicitly selected for a highly sought-after Fellowship in Otology and Neurotology - Skull Base Surgery at Baylor University Center in Dallas. During this time, he also served as a Clinical Adjunctive Professor.

Dr. Kendal Stewart is a Board-Certified Otolaryngology/Head and Neck Surgery specialist and has sub-specialty training in Otology and Neurotology - Skull Base Surgery. He served as a Clinical Associate Professor at the University of Texas Medical School at San Antonio’s Department of Otolaryngology from 1994 to 1996. He’s been tapped to speak at national conferences over 40 times as a result of his expertise. Additionally, Dr. Stewart has volunteered his time for numerous academic pursuits, including assisting in designing Masters and Doctorate candidate projects for the University of Texas Department of Kinesiology, Psychology, and Speech and Language Development, as well as assembling a patient database for these efforts. He has also participated in two doctoral candidate review boards at the University of Texas.


Our Founder / Chief Executive Officer



Kara Stewart-Mullens is one of the founders and Chief Executive Officer of Neurobiologix, Dr Neurobiologix and GX Sciences, Inc. Although her past work history and experience lies mostly in the consumer goods management sector, her drive to market and sell products comes very natural to her. Her intense interest and education in psychology led her to choose the field of advertising and sales so that she could understand how the human mind works and makes choices. “If you put yourself in the shoes of the consumer and not as the seller then you will achieve much more success in sales and building relationships.”

With over 23 years of experience, her expertise in sales management, marketing and brand development speaks for itself. Guiding Neurobiologix for 10+ years to be a recognizable and national nutrition brand has been a joy and blessing. With her own family who suffers from moderate Neuro-Immune Syndromes, genetic testing and clean nutritional formulas allows her to give her family and others the gift of quality nutrition with genetic validation that can help someone be their best and improve their health. This is what warms her heart the most. “If I can touch one person with the gift of finding our products then I have done my job.” Now with the validation of nutrigenomic testing and the development of GX Sciences, the thrill of helping people with scientific backing through DNA analysis is the icing on the cake that allows both companies to succeed.

She also shares her passion for health and wellness with her older brother, Dr. Kendal Stewart, by hosting a popular radio show "Coffee With Dr. Stewart". With over 500,000 downloads the siblings share their stories and Dr. Stewart shares his medical expertise to bring people hope and knowledge to health challenges they may face. She is also a member of the American Academy of Anti-Aging Medicine.


Our Chief Operating Officer

Michael Willoughby is a seasoned veteran in the laboratory sector. He started his career as a Laboratory Tech and Histologist in Nacogdoches Texas where he double majored in Nursing and Medical Technology at Stephen F. Austin. Before and during college Michael served in the armed forces as an Army Combat Medic.

After college Michael moved to Houston in 1991. There he established a small placement firm of Histologists throughout the Texas Medical Center (TMC). While building relationships in the TMC, Michael formed a solid foundation of healthcare knowledge through partnerships with the likes of MD Anderson, The DeBakey Heart Center, Baylor College of Medicine, and both Methodist and Memorial Healthcare systems.

In 1994 Michael was approached by the senior leadership team of Clinical Pathology Laboratories to help scale the company beyond the Austin borders. To make a long story short, he spent the first 10 years building business units throughout the Southwest and the second ten years as CPL’s Senior Vice President overseeing Operations and Commercial Services from the corporate offices in Austin Texas. During that time, he was successful in creating high throughput service units, created a very successful sales division, presented multiple acquisition opportunities, and lead a key role in fostering the culture of what was set by the founders of the company. CPL was ultimately purchased by Sonic Healthcare and is still one of the great success stories in the laboratory sector today.

Although many thanks were given to the folks at CPL… now Sonic Healthcare, Michael chose to leave the company in 2014 to explore global opportunities beyond the Southwest area of the country. Over the past 36 months, Michael has consulted for several laboratory companies such as Cardio Vascular Biomarker Labs, Non-Invasive Prenatal Testing Labs, and private labs looking to reorganize or develop a commercial sales force. Not to mention Co Founding a new patient access service called Iggbo (an Uber like blood drawing service). All along he knew his next stop would be with a company that was innovative, service related, and had the opportunity to make a difference in people’s health.


Our Director of Laboratories Services

Steve Finckbeiner is a biologist with experience in vertebrate neurobiology, small molecule drug development, and molecular genetics. Steve's current research focus is development of novel diagnostic tools for precision medicine.

Steve was trained in the neurobiology of catfish olfaction by John Caprio at LSU. During a sojourn in the icy wastes of upstate New York, Steve earned a neurobiology masters degree with Tom Eisner at Cornell University and a PhD in molecular pharmacology with Janice Sufrin at Roswell Park Cancer Institute. While a graduate student in hockey country, Steve was also part of the Graduate Partnership Program at the National Human Genome Research Institute (NHGRI). Seeking a warmer climate, Steve did an Intramural Research Training Award postdoctoral fellowship with Paul Liu at NHGRI. Steve's tour of academia was completed with a second postdoc at St. Jude Children's Research Hospital. Following the advice given to so many young men of his generation, Steve moved west to join the GX Sciences team here in Austin, Texas.