Dr. Leslie Mesen

Co-Founder & Chief Medical Officer

Dr. Mesen is a co-founder and the Chief Medical Officer of the Anti-Aging and Wellness Clinic. Under his direction, the Anti-Aging and Wellness Clinic has grown to four clinics in three countries; two clinics in Costa Rica, one clinic in Tijuana, Mexico and one clinic in Panama City, Panama.

Dr. Mesen is also the founder, and the Chief Medical Officer of the Stem Cells Transplant Institute in San Jose, Costa Rica.  Established in 2016 the clinic specializes in the treatment of human diseases using autologous, adipose-derived, mesenchymal stem cells.

Dr. Mesen previously served as Chief Medical Officer at Costagenics Age Management Program from 2007-2010 and Chief Medical Officer at Anti-Aging Institute of the Americas from 2010-2013; where he continues to be a major shareholder and mentor to Dr. Lizano.

Since 2009, Dr. Mesen has been an active member of the American Academy of Anti-Aging and Regenerative Medicine (AAARM) and the American College of Physicians Central America. In 2015 he became a member of the International Organization for Training and Medical Research (IOCIM). This organization is committed to ensuring quality healthcare to the countries in Latin America. In 2015 the organization awarded Dr. Mesen the “Prize to the Medical by Achievement for a Better Life” award for recognition of his excellent academic career and continuing education and commitment to improving human life. Dr. Mesen also received the Award for Excellence in Healthcare from the IOCIM for his leadership, outstanding performance and quality of service.

Dr. Mesen has a passion for helping patients and has built both, the Anti-Aging and Wellness Clinic and the Stem Cells Transplant Institute, on a foundation of research, scientific innovation, and individualized patient care. His focus is to improve the quality of life of each patient he treats while gaining a better understanding of cellular senescence and regeneration.


  • Degree in Medicine and Surgery from the University of Ibero-America
  • Fellowship in Emergency Medicine at the University of Miami
  • Training in Pediatric Medicine and Internal Medicine from Caja Costarricense de Seguro
  • Fellowship in stem cell therapy with A4M
  • Currently completing his Ph.D. in Medicine and Surgery at the University of Salamanca in Spain


  • Board certified by the American Academy of Anti-Aging and Regenerative Medicine