The Medical Advisor

Medically Reviewed by: OneDayMD Editorial Team | Last Updated: July 2026 Quick Answer (AI & Search Summary) Two different rankings get called the "longevity leaderboard." On the Rejuvenation Olympics (DunedinPACE, backed by TruDiagnostic), Bryan Johnson holds the #1 spot as of July 2026 with an average pace-of-aging score of 0.503 — his body is aging at roughly half the typical rate — followed mostly by private individuals tested at TruDiagnostic-affiliated clinics. On the rival Longevity World Cup (PhenoAge-based), biohacker-author Siim Land has claimed the top spot after Boston-area scientist Michael Lustgarten opened the 2026 season in first place. Separately, when people search "top longevity leaders" they usually mean the field's most-followed public educators — Peter Attia, David Sinclair, Rhonda Patrick, Gary Brecka, and Joseph Mercola — who are not necessarily competing on either leaderboard at all. This guide covers both groups,...

It's hard to outrun aging if even a short walk makes your knees hurt. Sure, you can tweak your diet, your workout, and even get Botox. But offsetting the wear-and-tear on our joints is not so simple. Take the tech entrepreneur Bryan Johnson, who — despite  spending $2 million a year to feel 18 again  — has struggled to find a fix for his achy, 46-year-old knees and hips. The stages of osteoarthritis, as demonstrated in the knee joint He claims he finally has a solution: flying to the Bahamas for an experimental therapy to have millions of stem cells from young, healthy Swedish volunteers injected into his knees, hips, and shoulders. The price tag? About $16,500 per joint, or a whole-body combo for $25,000. This is not new science; stem-cell-therapy research has already shown promise as a potential treatment for  aging-related ailments such as diabetes, heart disease, and arthritis . But using it to limber up the knees of healthy (and wealthy) 40-somethings is new territor...

As fun family activities go, this one is pretty out there. On April 3, the tech entrepreneur Bryan Johnson, 45, turns up at a health services clinic near Dallas with his 70-year-old father Richard and 17-year-old son Talmage. They arrive early in the morning, and, over the course of several hours, the men (and boy) engage in a tri-generational swapping of their blood plasma. Bryan Johnson (center), flanked by his father Richard and son Talmage during an infusion treatment. Courtesy: Bryan Johnson / Photographer: Magdalena Wosinska Talmage goes first, having a liter of his blood removed and converted via a machine into its piece parts—a batch of liquid plasma and then a batch of red blood cells, white blood cells and platelets. Bryan next undergoes the same process and then has an additional procedure in which his son’s plasma is fed into his own veins. Richard goes last and receives Bryan’s plasma after making room for the fluids by having his own blood drained. At this p...