Fountain Life, a leader in healthy longevity and preventive healthcare, announced the appointment of Dr. Dawn Mussallem as Chief Medical Officer. In this role, Dr. Mussallem will guide the company’s mission to deliver advanced diagnostics, precision prevention, and regenerative therapies that optimize healthspan and enhance overall quality of life. The appointment reflects Fountain Life’s commitment to combining cutting-edge technology with evidence-based, personalized care to support proactive health management and longevity.
Dr. Mussallem is a Mayo Clinic Consultant in Hematology and Oncology and serves as an Assistant Professor of Medicine. She is recognized for her expertise in cancer prevention, integrative oncology, lifestyle medicine, survivorship, and human performance. As a double board-certified specialist in lifestyle medicine at the Robert and Monica Jacoby Center for Breast Health, she has built a reputation for delivering comprehensive breast cancer care that integrates diagnostics, nutrition, movement, mind-body practices, and conventional therapies to promote both longevity and well-being.
William Kapp, Co-Founder and CEO of Fountain Life, praised Dr. Mussallem as a physician-leader who combines scientific rigor with deep compassion and firsthand experience. Kapp noted that her achievements at Mayo Clinic in creating innovative programs, shaping medical education, and advancing whole-person care closely align with Fountain Life’s vision of a prevention-focused, performance-oriented healthcare model.
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At Mayo Clinic Florida, Dr. Mussallem founded the Integrative Medicine and Breast Health Program, which supports patients during and after cancer treatment through lifestyle interventions alongside standard care. She also chairs the Employee Well-Being Committee and serves as Medical Director for the Humanities in Medicine program, leading initiatives that foster resilience, creativity, and meaning for healthcare professionals. Her ongoing projects include a regenerative farm initiative connecting sustainable agriculture with clinical and community education to expand access to nutrient-dense, plant-forward foods.
As Chief Medical Officer, Dr. Mussallem will work closely with Fountain Life’s clinical and operational teams to refine clinical standards, improve member outcomes, and accelerate innovation across the company’s longevity programs. She emphasized that the company’s approach integrates AI-enabled diagnostics, lifestyle-based prevention, regenerative therapies, and high-touch physician guidance to make healthspan measurable, actionable, and sustainable. Dr. Mussallem described her mission as creating a precision-health ecosystem that empowers individuals to optimize longevity and experience a deeply personal sense of vitality.
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A recognized keynote speaker, Dr. Mussallem has presented globally at events including the Global Wellness Summit, Mayo Clinic College of Medicine commencement, White House Correspondents’ events, and major sporting venues. She has contributed to peer-reviewed publications, book chapters, and research examining how nutrition and lifestyle interventions impact disease progression, survivorship, and overall healthspan.
Shawn Buchheit, President of Fountain Life, stated that Dr. Mussallem’s leadership is critical to advancing a prevention-first healthcare model. Her ability to combine clinical excellence, lifestyle medicine, and real-world outcomes will support Fountain Life’s expansion and set a new standard for proactive, performance-focused healthcare.
Dr. Mussallem also co-directs the International Medical Breast Training Program and created Mayo Clinic Florida’s Lifestyle Medicine Residency Curriculum to train future physicians in integrative and preventive care. She serves as a scientific advisor to multiple organizations in lifestyle medicine, nutrition science, and health innovation and participates in community leadership initiatives such as the Blue Zones Project Jacksonville Steering Committee and the Food Policy Council. Her professional dedication is shaped by a personal journey that includes a stage IV cancer diagnosis during medical school and a heart transplant in 2021. She became the first person worldwide to complete a full marathon one year after her transplant, embodying the principles of recovery, regeneration, and peak performance she now teaches.
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