David Barzilai

At a glance

• Physician with a doctorate (MD, PhD) focused on longevity medicine; has taught at Harvard Medical School.
• Founder of Barzilai Longevity Consulting (Boston), where he advises people on healthy ageing.
• Among the founders of the Geneva College of Longevity Science, an educational initiative on the science of ageing for doctors and other professionals.
• First author of ‘Healthy life extension: Geroscience’s north star’ (Aging, 2026), which argues that healthy years — not just lifespan — should be the focus of ageing research.
• Also co-authored a review of Mikhail Blagosklonny’s hyperfunction theory, which sees ageing as a growth programme running on too long, with rapamycin as the well-known example.
• Joined Kara Fitzgerald in 2026 to discuss what actually slows ageing and what is mostly hype. Relevant because he bridges lab and clinic while keeping an eye on the limits of the evidence.