Dr. David Barzilai, MD, PhD, MS, MBA, FAAD, DipABLM is medical doctor and founder and CEO of Healthspan Coaching LLC. On X Dr. Barzilai is known as @agingdoc1 with over 25,000 followers in geroscience (aging biology), longevity medicine, and healthspan practitioners and specialists. He is also host of the Agingdoc Podcast on YouTube, which holds fireside chats with leading aging biologists and longevity entrepreneurs including Matt Kaeberlein, Aubrey de Grey, Joao Pedro de Magalhaes, Morgan Levine, Rozalyn Anderson, Nir Barzilai, and others. Dr. Barzilai’s PhD is in health services research with a strong focus in clinical research, healthcare quality appraisal interventions in the delivery of medicine, and evidence-based medicine healthcare best practices.

In addition to his training as a Diplomat of the American Board of Lifestyle Medicine and certifications in nutrition, health coaching and longevity medicine, Dr. Barzilai is also known for closely following and rigorously appraising health outcomes data in humans, and the aging biology literature. Through Barzilai Consulting – Healthspan Coaching LLC, Dr. Barzilai applies his knowledge and experience to collaboratively partner with clients towards the pursuit of optimal healthy longevity. Dr. Barzilai’s consultation and coaching services are complementary to care provided by client’s established longevity practitioner, clinic or center. His work has been featured in Longevity Technology, Lifespan.io News, Decrypt, VitaDao, and the Sheekey Science Show.