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At Thrive Medicine Clinic, our philosophy is deeply rooted in the synergy of functional, integrative, and regenerative medicine. We believe in a holistic approach that goes beyond the surface to address the underlying causes of health issues. This method not only seeks to heal but to transform your health by focusing on the body's innate ability to regenerate and repair. By integrating the best of modern science with traditional healing wisdom, we offer safer and more effective alternatives to conventional treatments. Our approach is designed to empower you with health solutions that are as unique as you are, ensuring a journey to wellness that is both comprehensive and personalized. Join us in embracing a future where your health is nurtured from the inside out.
We are deeply committed to empowering our patients. We believe in educating you about your health, providing personalized care plans that fit your unique needs, and fostering a partnership in health that respects your voice and choices. Our goal is to help you take ownership of your health journey, equipping you with the knowledge and tools needed to make informed decisions.
By empowering you to be an active participant in your care, we aim to transform not just your health, but your life. Together, we embark on a path to wellness, where you are in control and thriving is the destination.
Dr. Rhet Langley is a double board-certified physician in Anesthesiology and Pain Medicine with a clear vision: to bring purpose, precision, and personalized care back into medicine. After years of seeing patients stuck in a system that focused more on symptom management than true health, he set out to build something different.
Thrive Medicine was founded as a direct answer to what’s missing in traditional healthcare: longer conversations, deeper investigations, and real solutions rooted in science. Dr. Langley helps patients move beyond quick fixes and rediscover what it means to feel strong, focused, and energized for life.
With advanced training, years of clinical leadership, and over a decade of service as a Major in the United States Air Force, Dr. Langley brings a calm, mission-driven mindset to every patient he sees. His practice combines diagnostics, regenerative medicine, hormone optimization, and functional strategies to deliver measurable outcomes—not guesswork.
Patients who come to Thrive are often tired of being told “everything looks normal” when they know something’s off. Dr. Langley listens differently. He leads differently. And he helps people step into a new level of performance, clarity, and health that many didn’t know was possible.
This isn’t about chasing trends. It’s about restoring the core of what medicine should be.
Personal, proactive, and rooted in results.
Dr. Langley lives with his beautiful wife Sarah and their lovable bulldog, June. He hopes that you will get to meet both soon, being part of the THRIVE FAMILY. He likes to laugh and makes others laugh. In his free time, you will find him in the Heights riding bikes with Sarah, lifting weights, or attempting to make sushi for the first time at home.
Dr. Gallegos is a board-certified anesthesiologist with advanced training from The University of Texas Health Science Center at Houston. With deep expertise in ultrasound-guided nerve blocks and interventional pain management, he’s helped countless patients find relief through precision and innovation. Over the years, he has served in key leadership roles—including Chief of Anesthesia and Hospital Medical Director—and has twice been honored by his peers as a Top Doctor in Anesthesia (2018, 2021).
But behind the professional accolades is a personal story of transformation.
Like many healthcare professionals, Dr. Gallegos once prioritized his career over his own well-being. Years of overwork and self-neglect took a toll until he made the decision to take charge of his health. Guided by the principles of functional medicine and regenerative medicine, as well as ancestral health, he began his own journey toward healing and optimal performance. What started as self-discovery quickly became a calling.
Reunited with fellow colleague from residency training, Dr. Rhet Langley, the two founded THRIVE Medicine Clinic with a bold mission: to help patients go beyond symptom management and truly thrive physically, mentally, and energetically.
Dr. Gallegos lives just outside Houston with his wife Katie, their spirited daughter Finley, two clever Basenjis (Captain Morgan & Clementine), a quirky cat named Alley, and a vibrant community of 75 freshwater fish. He and Finley share a passion for aquascaping, while he and Katie live as wellness role models for their daughter—leading by example in fitness and lifestyle.
When he’s not with patients or family, you’ll find Dr. Gallegos in nature (hunting, fishing, or hiking) or immersed in his other passions: cooking, reading, exploring new cultures through travel, and vibing to electronic dance music. He’s also committed to giving back and participates in annual medical missions to provide care to underserved communities.
Licensed as a Nurse Practitioner since 2021, Allen brings a diverse clinical background with experience in internal medicine and medical aesthetics. Before becoming an NP, she worked as an inpatient nurse specializing in pediatric cardiology and also gained experience in adult cardiology, giving her a strong foundation in complex patient care. She earned her ADN from Houston Community College in 2016, followed by a BSN from the University of Texas at Arlington in 2018. In 2021, she completed her MSN as a Family Nurse Practitioner at the University of Texas Health Science Center in Houston. Additionally, she is certified in neurotoxin and facial filler injections, reflecting her expertise in medical aesthetics.
Allen’s approach to patient care centers on active listening, patient empowerment, and education. She is committed to delivering top-quality care tailored to each individual’s needs, ensuring the best possible health outcomes. She believes that clear communication and consistent follow-up are essential to making patients feel heard and supported throughout their healthcare journey. Motivated by seeing patients improve and achieve their health goals, she finds her work deeply fulfilling. Her dedication to excellence was recognized in 2024 when she received the Good Samaritan Excellence in Nursing Award by the Good Samaritan Foundation.
Allen enjoys spending quality time with her family, tending to her home garden, and caring for her gecko and chameleon. Her passion for nursing is driven by a genuine belief in the impact of her work and a commitment to providing the best care possible every day.
With over a decade of experience as a medical assistant, Leslie brings a wealth of knowledge and compassion to the THRIVE team. Her diverse background spans multiple specialties, including family practice, aesthetics, pediatrics, endocrinology, and pain management. Her broad clinical experience allows her to connect with patients across a wide range of health concerns, always with a focus on personalized, empathetic care.
Leslie first discovered THRIVE during her own wellness journey. In her search for a clinic that genuinely prioritized patient care and long-term solutions, she found exactly that in Dr. Langley and Dr. Gallegos. Their philosophy aligned perfectly with her own values, and joining the THRIVE family felt like a natural next step.
Leslie enjoys working out in her home gym and cherishing time with her family. She and her husband Israel love creating memories with their daughter Jessalyn—whether that’s enjoying movie nights, seeking thrills at amusement parks, traveling to new places, or discovering exciting new foods together. For her, family and wellness go hand in hand, and she brings that same energy and dedication into every patient interaction.
Sarah is a Registered Dietitian who has always had a passion for nutrition and wellness. Sarah has a Master of Science Degree in Nutrition and a Bachelor of Science Degree in Dietetics. She also holds a B.A. in Psychology. Sarah is a consistent reader of all the latest nutrition research and enjoys helping people incorporate those strategies into their daily lives. Her passion is helping people make the best possible nutrition and exercise choices for their health. Proper nutrition and a healthy relationship with food are vital to feeling your absolute best. She has a strong belief in the importance of nutritious food, movement, and finding your passion in life.
Sarah spends her time doing gymnastics and actually competes in adult gymnastics competitions throughout Texas. She loves all things food and enjoys cooking or exploring the culinary scene in Houston. Sarah is also an avid book reader and a huge animal-lover.
Donna Echlin has a Master of Science degree in Psychological Counseling and has been in practice for over 30 years as a licensed psychotherapist. Using modalities including EMDR, Donna treats patients with anxiety, fears, phobias, depression, grief, relationship issues, family conflict, trauma, PTSD, pain management, peak performance, addiction and many others. Her treatment philosophy has always been to approach the whole person, considering their medical and physical wellness, including their emotional, psychological, social and spiritual well-being. Being part of the multidisciplinary team at THRIVE is her dream come true. Her passion is helping others reach their full potential, and it is a joy for Donna to be part of the incredible patient transformations and heightened sense of well-being happening at THRIVE.
Donna enjoys spending time with family and friends, walking in nature, strength training, cooking, reading, going to the theater and traveling. Donna can often be found exploring Houston’s museums and live music venues.
Ellen is a content marketer with over a decade of experience helping brands tell better stories and connect with their people. She's led campaigns, built strategies, and brought ideas to life across industries, but her favorite work lives at the intersection of creativity and impact.
A lifelong athlete (D1 long and triple jumper, National Champion, CrossFit Games competitor), Ellen has always been drawn to health and wellness. She also knows what it is like to get lost in the narratives the industry throws at you. To believe that health is just only weight, appearance, or even performance, and to let it define you. After shifting her narrative (and recovering from a 6+ year eating disorder), she found a more holistic approach and began coaching others to root their health in nourishment, self-respect, and joy. Now at Thrive, Ellen gets to merge her marketing chops with her passion for changing people’s perspective around what it means to be well.
When she's off the clock, you’ll find her running with her two dark red Golden Retrievers, making ceramics, exploring new places, or baking something just slightly overambitious.