About Us

Addressing The Root Causes Of Disease. Not Just A Set Of Symptoms.

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doctor talking to patient

Our Mission

We seek to be an instrument of healing, for people and for the world, by exposing and effectively treating the underlying causes of disease.

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Meet Dr. Guillory

Derek W. Guillory, MD, our founder and Medical Director, has a passion for functional medicine that was born out of his own personal struggle with health concerns that began before the age of 17. That passion has persisted and grown through years of medical training and through almost two decades in urban emergency departments treating critically-ill patients. He has an insatiable curiosity for the question most often asked by his patients… “Why am I sick?”

Dr. Guillory became one of the first certified functional medicine practitioners in Texas in 2015. He earned his Bachelor of Science in Education at Baylor University in 1997, graduating Magna Cum Laude. In 2001, he graduated from the University of Texas Southwestern Medical Center in Dallas. He continued his medical training in Emergency Medicine at UT Southwestern Medical Center, graduating in 2004. He has been continuously Board Certified by the American Board of Emergency Medicine since 2005.

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Meet Charlotte Widick, APRN, IFMCP

Charlotte’s own health care crisis developed a deep desire to identify the root causes of illness. She passionately develops a personalized path toward her client’s wellness, incorporating nutrition, genetics, hormone balance, stress management and fitness. Each plan is an expression of her goal to create a patient-centered practice with a holistic approach, an empathetic ear, a compassionate heart, and a community vision.

Charlotte has been in health care for almost 40 years. She has a Master of Science of Nursing with certifications in Emergency and Acute Care and has been a nurse practitioner since 1998. She has been studying integrative and holistic therapies for 20 years. She obtained certification with the Institute of Functional Medicine in 2018. She previously served on the graduate school faculty of the University of Texas Health Science Center at Houston.

“Functional Medicine determines how and why illness occurs and restores health by addressing the root causes of disease for each individual.”

-The Institute For Functional Medicine

what is causing your illness

Reach Out

  • 19026 Ridgewood Parkway
  • Suite 119
  • San Antonio, TX 78259
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  • Monday — Friday:
  • 10am to 6pm
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  • Saturday and Sunday:
  • Closed
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  • (210) 468-3042