Battling fatigue, anxiety, and depression, he embarked on a transformative journey into unearthing answers to his own health challenges. Fueled by the question, “How good can I be?” Dr. Gladden transitioned from a conventional health care approach to championing peak human performance. Today, his life is a testament to this transformation, exemplifying boundless vitality through activities like running, surfing, mountain biking, and music. Dr. Gladden’s journey beckons us to embrace our ageless potential and embark on a path to Live Young for a Lifetime.
Dr. Jeffrey Gladden’s story is one of remarkable transformation and pioneering vision. With a background in interventional cardiology, he founded Gladden Longevity + Advanced Performance Center. Graduating from Temple University with Honors in Medicine, he delved into various cardiology domains, leaving an indelible mark on the field. Dr. Gladden holds the position of Director of Heart Attack and Stroke Prevention and Cardiac Rehabilitation at The Heart Hospital Baylor Plano, which he co-founded in 2004. Additionally, he plays pivotal roles at Scientia Cardio Access and Scientia Vascular as CEO, CMO, and board member. Despite these achievements, his personal and professional life encountered a pivotal shift in his mid-fifties.
From an early age, Luke Sorrell was drawn to the medical field, driven by a passion for science and a deep desire to help others. His journey began with a degree from Abilene Christian University, followed by medical school at The University of Texas at Houston, and an internal medicine residency at Baylor University Medical Center in Dallas. Initially, Luke worked as a hospitalist before transitioning to primary care, believing it would be his long-term path.
While he valued the relationships he built with patients in primary care, Luke became frustrated with the reactive nature of traditional medicine. Late diagnoses of serious conditions, unchecked progression of pre-diabetes, and inadequate management of cardiovascular disease highlighted the need for a more proactive approach.
This realization led Luke to functional and longevity medicine, focusing on early detection, comprehensive interventions, and addressing root causes. Joining Dr. Gladden and Gladden Longevity felt like a perfect fit, aligning with his dedication to helping people “Live Young for a Lifetime.”
Luke lives in the Dallas – Fort Worth suburbs with his wife and two daughters. In his free time, he enjoys researching longevity medicine, exploring new restaurants with his wife, traveling, spending time with family, and participating in church fellowship.
From an early aspiration to be a detective, Jason Gourlas found his true calling in medicine while serving as an Army medic — a perfect fusion of investigative rigor and scientific passion. A member of the Texas Army National Guard, he graduated summa cum laude from the U.S. Army Physician Assistant Program in 1996 and later earned his Master’s in Physician Assistant Studies from the University of Texas.
With more than 29 years of clinical practice, Jason has a broad experience in military medicine, family practice, emergency medicine, neurotology, and surgical/trauma critical care.
In 2006, personal health challenges unmet by the conventional paradigm led him to integrative and functional medicine. By applying root-cause principles and lifestyle medicine, he restored his own health — an experience that redefined his approach to patient care. He went on to complete advanced training with the Institute for Functional Medicine and earned board certification from the American Academy of Anti-Aging Medicine.
Jason is deeply committed to translating the latest evidence-based integrative and functional strategies into personalized plans that resolve underlying drivers of disease and promote lasting vitality and longevity.
Outside the clinic, he enjoys listening to podcasts, finding good farm-to-table restaurants, hiking and spending time in nature with his wife.
Kelli Calabrese serves as Chief Growth Officer for Gladden Longevity, leading the clinic’s business development, membership strategy, and signature client experience. With more than 30 years of expertise in health, fitness and high-performance transformation, Kelli bridges advanced longevity science with world-class service to create a seamless, elevated journey for every client.
At Gladden Longevity, Kelli oversees strategic expansion, brand development, and the full lifecycle of client engagement, ensuring that each individual receives personalized, concierge-level care from their first inquiry through their advanced optimization plan. She partners closely with Dr. Jeffrey Gladden and the clinical team to design programs, systems, and experiences that reflect the innovation, precision, and luxury of the Gladden Longevity brand.
Before joining the organization, Kelli built a distinguished career as a wellness expert, consultant, author, and international speaker. She has been featured across major media, coached thousands toward transformation, and co-hosts the Fit Over 50 Life Podcast, helping inspire people to live younger, longer, and stronger.
Driven by excellence and purpose, Kelli is dedicated to helping clients unlock their full potential and experience what’s possible when health, performance, and longevity are optimized at the highest level.
Lizette Reyes is a highly skilled Registered Nurse with more than a decade of experience in IV therapy, pre- and post-operative nursing, and high-acuity patient care across surgical, pediatric, and wellness environments. She is known for her calm presence, steady hands, and compassionate approach, bringing a rare blend of precision and warmth to every patient interaction at Gladden Longevity.
Her career includes extensive work in pre-op, PACU, OR, and infusion settings, where she developed deep expertise in IV insertion, phlebotomy, EKG monitoring, medication administration, and comprehensive patient assessment. Lizette has served in respected institutions such as Scottish Rite Hospital for Children, SameDay Surgicare, Restore HyperWellness, and multiple concierge IV therapy practices throughout Dallas–Fort Worth. Her ability to work efficiently under pressure while maintaining a supportive and reassuring environment has earned her a reputation for excellence and trust.
Lizette is BLS and PALS certified and brings a strong foundation in both surgical and wellness-based nursing. She is passionate about delivering high-touch, individualized care that helps clients feel safe, understood, and confident throughout their treatments. With her detail-oriented mindset and strong clinical judgment, Lizette elevates the infusion and recovery experience at Gladden Longevity, ensuring every patient receives the highest standard of care.
Megan Lyons, founder and owner of The Lyons’ Share Wellness, has shared her game-changing approach to wellness with thousands through personalized health coaching, corporate and group wellness programs, and motivational speaking. She helps busy professionals manage work-life balance, health enthusiasts reach optimal levels, and those who’ve neglected their health feel better than ever.
With over 12 years in business, Megan has completed more than 14,000 hours of 1-to-1 nutrition consulting. Her expertise ranges from weight loss and emotional eating to managing thyroid dysfunction, reversing prediabetes, and complementing chronic disease therapies. Her deep training in Functional Medicine and integrative nutrition enables her to address root issues, not just symptoms.
Megan hosts the popular podcast, Wellness Your Way, and authored the Amazon bestseller “Start Here: 7 Easy, Diet-Free Steps to Achieve Your Ultimate Health and Happiness.” She holds degrees from Harvard and Northwestern, and certifications in holistic and clinical nutrition. She’s currently pursuing a Doctorate of Clinical Nutrition. Megan lives in Dallas with her husband and dogs, and enjoys working out, cooking, reading, traveling, and cheering on the Dallas Mavericks.
Ashley Anderson is a board-certified Functional Medicine Practitioner with more than a decade of experience in functional medicine and over 20 years in nutrition and fitness. Her journey began in college as a fitness instructor and personal trainer, leading her to earn a Bachelor of Science in Health, Human Performance, Recreation, and Coaching from the University of Wisconsin–Whitewater and begin her career in the nutrition and fitness industry.
Her life took a significant turn in 2013 when her mother passed away from ALS, and Ashley began experiencing autoimmune symptoms. Conventional medicine offered limited guidance, prompting her to explore functional medicine. This approach restored her health and inspired her mission to help others take control of their well-being.
Committed to advancing her knowledge and clinical skills, Ashley earned a Master’s degree in Human Nutrition and Functional Medicine and a Doctorate in Clinical Nutrition (DCN). She is also a Licensed Dietitian Nutritionist (LDN), Certified Nutrition Specialist® (CNS), and a Certified Practitioner through the Institute for Functional Medicine (IFMCP). She serves clients through her private practice in Madison, Wisconsin, and with the Gladden Longevity team, blending evidence-based functional medicine with her background in fitness and nutrition.
A mother of four, Ashley understands the challenges of balancing health with a busy life. She enjoys gardening, reading, outdoor activities, and live music.
Kassady Backes (Kass) is a functional nutritionist and health coach who gets it. She’s been there: impossible fad diets, endless medications and supplements to cover up symptoms, and providers that don’t truly hear you.
Kass knows optimal health is cultivated through small, sustainable changes and by looking upstream to bring the body back into balance. She’s passionate about creating an empowering and shame-free space to meet clients where they’re at.
Kass has experience working 1 on 1 with clients as well as leading educational classes. She is a Certified Nutrition Specialist and National Board Certified Health & Wellness Coach who received her Master of Science in Human Nutrition and Functional Medicine. In addition, she has a Bachelor of Health Science, Biology Minor, and countless hours spent researching and advancing through education and change techniques.
Outside of work, Kass can typically be found walking around barefoot outside, listening to health podcasts, attempting ceramics, and planning her next travel destination. She is a Missouri native currently residing in San Diego, CA with her partner and cat.
Zack Jenkins is an accomplished Fitness Director with a distinguished academic background, holding a Bachelor of Science in Kinesiology from East Carolina University and a Master of Science in Kinesiology, specializing in Biomechanics, from the University of Tennessee. As a NASM-Certified Personal Trainer (NASM-CPT), Zack is deeply committed to helping individuals achieve their fitness goals through evidence-based training methods. His approach emphasizes both peak performance and long-term health, ensuring clients not only reach their objectives but maintain them sustainably.
Beyond his professional endeavors, Zack is dedicated to leading an active and fulfilling personal life. He cherishes spending time with his wife, Ashlynn, and their dog, Zoey, and values the moments shared with close friends. Zack remains actively involved in his community, whether he’s running, walking the scenic Katy Trail, or enjoying a round of golf. His passion for fitness and well-being extends into every aspect of his life, making him a well-rounded and inspiring leader in the field.
Functional Movement Specialist | Certified Personal Trainer | Performance Coach
With over nine years of experience in fitness, coaching, and behavioral counseling, Jonathan Delmar is a results-driven professional specializing in biomechanics, corrective exercise, and nutrition coaching. Holding a Bachelor of Science in Exercise Science and multiple NASM certifications, he integrates movement science, behavioral insight, and performance strategy to help clients move better, think stronger, and live healthier.
Jonathan has worked with individuals ranging from seven to eighty-six years old, creating personalized programs that enhance mobility, strength, and overall wellness at every stage of life. His expertise in biomechanical analysis allows him to identify movement inefficiencies, prevent injury, and optimize performance. Drawing on his background in behavioral counseling, he helps clients develop mental resilience, confidence, and sustainable habits that lead to lasting transformation.
Respected for his precision, motivation, and holistic approach, Jonathan is dedicated to guiding others toward sustainable progress physically, mentally, and personally.
Veronica Berry brings over a decade of high-level experience in medical device sales, aesthetics, and consultative patient care to Gladden Longevity. With a career rooted in driving growth, elevating brand presence, and creating exceptional client experiences, Veronica is known for her strategic mindset, strong leadership, and ability to build trust quickly with both patients and providers.
Her background spans some of the most competitive sectors in healthcare and aesthetics. As a Contract Medical Device Territory Manager for Alix Lasers, she led regional sales efforts, consistently increasing quarterly revenue and establishing strong partnerships across the Southwest. In her role as Nationwide Lead Patient Care Coordinator for Premium Care Plastic Surgery, she guided clients through complex decision-making, educated them on procedures, and helped expand the practice’s national reach through service excellence and relationship-driven sales.
Before entering the medical space, Veronica built a successful career in experiential marketing and large-scale event production. She served as a Travel Sales Manager for Milan Laser, a Lead Room Producer for Drury Design in New York, and a Senior Manager for Experiential Events & Auto Shows with Innocean USA. There, she managed over 150 events, delivered a 7% annual sales increase, and elevated brand visibility through polished presentations, media appearances, and top-tier client engagement.
Veronica holds a Bachelor of Science in Business Management from the University of Phoenix and a Certification in Orthobiologics and Regenerative Medicine from the Medical Device Sales College. Her blend of business acumen, medical sales expertise, and client-centered communication makes her a powerful asset in helping clients navigate their longevity journey with clarity and confidence.
At Gladden Longevity, Veronica is passionate about connecting people with the advanced therapies, technologies, and transformational programs that help them live younger and stronger at every stage of life.
Abigail Buentello is a dedicated and compassionate Certified Medical Assistant with a strong clinical foundation and a passion for delivering exceptional patient care. She brings a combination of hands-on medical experience, outstanding communication skills, and a warm, personable approach that helps clients feel supported from the moment they arrive.
Before joining Gladden Longevity, Abigail served at WellMed Medical Management, where she gained extensive experience in both clinical and administrative roles. Her responsibilities included taking vitals, administering injections, performing point-of-care testing, assisting with minor procedures, monitoring Medicare measures, handling prescription refills, completing documentation, managing insurance-related tasks, and providing phlebotomy services. Abigail’s ability to work seamlessly between the clinical floor and front desk operations reflects her versatility, adaptability, and commitment to smooth, high-quality patient experiences.
Earlier in her career, Abigail strengthened her customer service and leadership skills through roles in retail and hospitality, where she learned to navigate fast-paced environments, resolve issues quickly, and maintain a positive, service-driven mindset. These skills now contribute to her calm, capable presence in a healthcare setting.
Abigail is CPR certified and currently pursuing her Bachelor of Science in Psychology at Western Governors University, furthering her knowledge in human behavior, communication, and patient support. She is passionate about whole-person care and thrives in environments where excellence, empathy, and continuous growth are valued.
At Gladden Longevity, Abigail plays an integral role in ensuring each client’s experience is efficient, comfortable, and exceptional — supporting our mission to help people live younger, longer.
As the director of client relations and sales at Gladden Longevity, I have the privilege of being the first point of contact for clients, guiding them through the onboarding process, conducting discovery calls, and managing program renewals. What I enjoy most about my role is building genuine relationships with our clients and helping them navigate their journey to optimal health. Seeing their progress and knowing we’re making a real impact on their longevity and performance is what drives me every day.
Before joining Gladden Longevity, I worked in the ER as a medical scribe, where I saw firsthand how reactive medicine often falls short. That experience reinforced my passion for preventative and performance-based healthcare, leading me to a career where I can help people take control of their health before issues arise.
I have a bachelor’s degree in biology from the University of North Texas, giving me a strong foundation in understanding the science behind longevity and high performance.
Outside of work, you’ll find me playing soccer, sand volleyball, or golf, or spending time with friends and family. I believe longevity is about more than just adding years—it’s about making every year count.
At Gladden Longevity, I’m here to ensure your journey is seamless, personalized, and built to help you thrive.
Debra Weatherford-Slatton joins Gladden Longevity® as a Store Associate, bringing more than 20 years of experience supporting patients, providers, and healthcare teams. With a strong background in EMR charge compliance, patient support, scheduling, and cross-department coordination, she has built a reputation for staying calm under pressure and keeping busy environments running smoothly.
Debra is known for her friendly personality, clear communication, and genuine care for the people she serves. She’s excited to bring her customer service strengths and passion for wellness to the Gladden Longevity® team.
Outside of work, Debra has been happily married for 30 years and is a proud mom and grandmother. Her 7-year-old grandson—nicknamed “the Bulldog” by his coaches—keeps her busy cheering from the sidelines at football games, which is one of her favorite things to do.
Jaylin has been an integral part of Gladden Longevity for the past five years, bringing with her a wealth of experience and a passion for health optimization. Prior to joining our team, she served as an Emergency Medical Technician (EMT) in a bustling emergency room for five years, where she honed her skills in high-pressure medical environments.
Her extensive background in emergency care has equipped Jaylin with the expertise to address diverse health challenges effectively. She is deeply committed to enhancing health, longevity, and overall performance through innovative, evidence-based strategies. Currently, Jaylin is furthering her education by pursuing a degree in Business Management, which will complement her clinical experience and enhance her ability to support our clients.
At Gladden Longevity, Jaylin excels in providing exceptional care, guiding clients on their journeys toward improved well-being and vitality. Her compassionate approach and dedication to client success make her an invaluable resource for those seeking to optimize their health.
Outside of her professional endeavors, Jaylin enjoys reading and cherishes quality time with her husband and daughter. She is also excitedly anticipating the arrival of another daughter in August, which adds to her joy and dedication to family life.
We are proud to have Jaylin on our team, where her commitment to excellence and passion for health inspire both colleagues and clients alike.
Mission: To unlock the ageless potential within each individual through cutting-edge solutions that optimize healthspan, elevate performance, and extend longevity for both our valued clients and us.
Vision: Our vision is to redefine the human experience; to empower individuals to unlock their ageless potential, enabling them to thrive vibrantly at every stage of life.
Philosophy: Our philosophy is rooted in the belief that the conventional understanding of aging as a linear process is flawed. Instead, we recognize aging as an exponential challenge, and maintain that our capacity to ask meaningful questions, without attachment to our answers, provides innovative solutions to Live Young for a Lifetime.