Meet the team behind your personalized longevity journey.
Dr. Hany Demian is a board-certified pain specialist, healthcare entrepreneur, and founder of Praesentia Healthcare, focused on redefining how we approach aging, chronic disease, and long-term health.
George Lantz is a Harvard-trained anesthesiologist and pain specialist with advanced training in interventional treatments for patients with acute and chronic pain.
Dr. John Girgis, ND, is a naturopathic doctor specializing in intravenous vitamin infusion therapy, hormone optimization, and personalized longevity care. He helps patients take a proactive approach to improving their healthspan, performance, and long-term wellbeing through individualized care plans.
With over 18 years of experience in performance, clinical nutrition, and lifestyle medicine, Curtis oversees the integration of evidence-based strategies across nutrition, recovery, and longevity programming.
Melissa holds an Honours degree in Biology from Queen’s University and a degree in Naturopathic Medicine, combining a strong scientific foundation with a passion for evidence-based, personalized healthcare.
Lori Filice is a seasoned business executive and operational leader focused on building high-performing teams, scaling organizations, and driving sustainable growth.
Leslie Cho is a seasoned finance executive with a decade of experience in the healthcare industry. Prior to joining Lifespan Bioscience, he spent the last four years as the Chief Financial Officer of a private-equity-backed dental service organization in Canada where he helped triple the number of practices under management.
Carol Peat is a healthcare leader with over 20 years of experience in nursing, pain medicine, and medical operations. Her work focuses on advancing clinical standards, improving patient care delivery, and supporting the growth of innovative healthcare programs.
Fred Jansen van Rensburg is the Vice President of Operations at Praesentia Healthcare, where he has been leading operational strategy and growth since joining the organization in 2023. He oversees operations, business development, and marketing across a multidisciplinary healthcare network, with a focus on delivering exceptional patient experiences and supporting sustainable growth.
Discover a more complete path to longevity.
Dr. Hany Demian is a board-certified pain specialist, healthcare entrepreneur, and founder of Praesentia Healthcare, focused on redefining how we approach aging, chronic disease, and long-term health. His work sits at the intersection of longevity medicine, regenerative therapies, and personalized care—helping patients move beyond symptom management toward treating the root cause and measurable health optimization.
With a background spanning frontline medicine and healthcare leadership, Dr. Demian brings a forward-thinking perspective on how emerging technologies, data, and precision diagnostics, genomics, and epigenetics are shaping the future of individualized, proactive care.
Dr. George Lantz is a Harvard-trained anesthesiologist, interventional pain specialist, and healthcare leader dedicated to advancing the treatment of acute and chronic pain through innovative, evidence-based, and regenerative approaches. His work focuses on restoring function, improving quality of life, and helping patients achieve meaningful, long-term outcomes through personalized care.
Drawing on a career shaped by diverse clinical experiences and multidisciplinary collaboration, he brings a comprehensive perspective to patient care, emphasizing innovation, function, and individualized treatment strategies.
Dr. John Girgis, ND, is a naturopathic doctor specializing in intravenous vitamin infusion therapy, hormone optimization, and personalized longevity care. He helps patients take a proactive approach to improving their healthspan, performance, and long-term wellbeing through individualized care plans.
Dr. Girgis develops individualized intravenous (IV) nutrient therapy and hormone therapy programs with an emphasis on comprehensive screening, clinical safety, and appropriate integration with conventional medicine.
With continuing education in longevity and age-management medicine through A4M and AMMG, Dr. Girgis brings a science-informed, whole-person approach to helping patients feel their best at every stage of life.
Curtis DeLong is a lifestyle medicine and performance specialist with over 18 years of experience in clinical nutrition, exercise science, and health optimization. As Director of Lifestyle & Wellness at Lifespan, he develops personalized longevity programs that integrate nutrition, movement, recovery, and evidence-based lifestyle strategies to help clients improve healthspan and overall performance.
With a background spanning athletic performance, functional medicine, and healthcare leadership, Curtis specializes in translating complex physiology into practical strategies that support metabolic health, body composition, resilience, and long-term vitality. His approach combines advanced assessments, personalized protocols, and sustainable lifestyle interventions to help individuals achieve measurable improvements in health and performance.
Dr. Melissa Capan holds an Honours degree in Biology from Queen’s University and a degree in Naturopathic Medicine, combining a strong scientific foundation with a passion for evidence-based, personalized healthcare.
With a background that bridges conventional science and integrative medicine, Dr. Capan specializes in making complex health concepts approachable and empowering. Her commitment to health, fitness, and disease prevention allows her to connect with patients on a personal level while helping them feel informed, supported, and confident throughout their health journey.
Outside of her clinical work, Dr. Capan enjoys golfing, strength training, and cooking for family and friends. She also loves exploring lesser-known destinations, discovering new cultures, cuisines, and landscapes along the way.
Lori Filice is a seasoned business executive and operational leader focused on building high-performing teams, scaling organizations, and driving sustainable growth. She believes that strong cultures, collaborative leadership, and investing in people are the foundation of organizational success and exceptional patient care.
With leadership experience spanning healthcare services and retail operations, Lori brings deep expertise in growth strategy, operations, and organizational transformation. Prior to joining Lifespan Bioscience, she served as Chief Operating Officer of a private equity-backed dental service organization, where she helped reshape company culture while delivering a 25% compound annual growth rate over five years. Earlier in her career, she played a key role in establishing the Canadian presence of a multinational beauty retailer, helping grow the business to more than 120 locations nationwide.
Leslie Cho is a seasoned finance executive with over a decade of experience in healthcare. Leslie holds a Bachelor of Commerce from the Rotman Commerce program at the University of Toronto and is a Chartered Professional Accountant with experience at a Big Four accounting firm.
Leslie brings expertise in building high-performing finance teams, implementing systems, improving operational efficiency, and leading complex M&A and corporate finance initiatives. He has led more than 40 M&A transactions, along with multiple debt and equity financings.
Before joining Lifespan Bioscience, he served as Chief Financial Officer of a dental service organization in Canada.
Carol Peat is a healthcare leader with over 20 years of experience in nursing, pain medicine, and medical operations. Her work focuses on advancing clinical standards, improving patient care delivery, and supporting the growth of innovative healthcare programs.
Beginning her career in cardiovascular surgery at Southlake General Hospital, Carol transitioned into pain medicine in 2007, where she developed a passion for helping patients with chronic pain improve their quality of life. Her clinical experience led to leadership roles overseeing medical operations, program development, infection control, physician relations, and regulatory compliance.
As Senior Vice President of Medical Affairs, Carol brings extensive expertise in healthcare governance, clinic operations, and quality improvement. She has played a key role in expanding multidisciplinary pain programs, developing new clinical services, and ensuring excellence in patient care across multiple healthcare facilities.
Fred Jansen van Rensburg is the Vice President of Operations at Praesentia Healthcare, where he has been leading operational strategy and growth since joining the organization in 2023.
Passionate about advancing patient-centred healthcare, Fred brings more than 15 years of experience in operations, strategic growth, and organizational leadership. He began his healthcare career in 2010 as Business Manager at Children’s Dental World, where he managed operations across four locations and led the expansion of a major orthodontic and surgical centre. In 2014, he joined Altima Dental, a private equity-backed dental services organization, as a Regional Manager, before being promoted to Director of Partnerships in 2018. In this role, he led new clinic integrations and change management initiatives, supporting the organization’s rapid growth. Fred holds a Bachelor of Commerce (Honours) in Business Management and a Bachelor of Commerce in Tourism Management from the University of Pretoria in South Africa.
Outside of work, Fred enjoys an active lifestyle through running, hiking, and snowboarding, reflecting the same commitment of wellness and longevity that inspires the Lifespan Bioscience mission.
