Fitness is the one thing that makes the biggest difference

If I had to pick the one thing I see make the biggest difference for people, it would be fitness, and specifically getting stronger and improving cardio over a long stretch of time. The research behind that is about as strong as anything we have in this field. It holds up in what I see day to day too, since the people who make real progress on their numbers are usually the ones who changed how they move. It's also the hardest thing to package, which is probably why it gets the least attention. There's no product to buy and it takes months to show up, so it doesn't make for much of a headline. I'll write more about this over the next few weeks, since I think it's the part longevity medicine has built out the least.