What makes it work is the relationship. Thorough proactive testing, careful cancer screening, and treatment built around you rather than a population average — supported by a doctor who knows your history well enough to notice when something changes. He is also watching where this is heading: medicines made for a single patient, read against live data from the devices you already wear.

Dr Paul graduated in medicine from the University of Melbourne and is a Fellow of the Royal Australian College of General Practitioners. He has been performing hair transplant surgery since 2005, after training under Shiell and Knudsen, with thousands of procedures behind him, and is a Fellow of the International Society of Hair Restoration Surgery. He is also a Fellow of the Cosmetic Physicians College of Australasia, where he has served as Secretary and as a Board member. Alongside clinical practice he has held senior leadership roles across healthcare and biotechnology, including as a medical director.

Two things shaped how he practises. The first is sport. He held the 100 and 200 metre sprint records at Melbourne University and was selected for Australia in korfball, and he collected a long run of injuries along the way — which taught him early that a strong body is injured less often and simply feels better. It is why musculoskeletal health sits alongside longevity and prevention in his clinical interests. The second is fatherhood. He wants a long and healthy life for the straightforward reason that he would like to spend as much of it as possible with his daughters.

The competitive streak has not entirely worn off. He will still tell you about the second shot he hit to within a metre of the pin on the eighteenth at St Andrews, in front of a gallery of fifty Japanese tourists. These days, though, he is more likely to strain something operating a tractor or a chainsaw.

Dr Paul grew up in Melbourne and lives on ten acres in the Macedon Ranges with his wife and their two daughters. He grows vegetables, forages for wild mushrooms, and keeps bees and chickens that lay blue, green and chocolate-coloured eggs. He also spends regular time with a friend in his late eighties who lost his wife — watching the football, making home-made pies, talking about investments. It is as good an account as any of what all of this is for.