My 64th birthday was yesterday.
I'm still playing volleyball with people whose average age is in their thirties. Much to my surprise, my knees are still holding up under such stresses. The PCL tear from five years ago does not cause any problems.
I am heartened by news that I read of an experiment done at Stanford. It appears that removing some cerebrospinal fluid from young mice and injecting it into the brains of older mice improves their memory. It does this by improving the growth of new myelin.
Moderate demyelination is a problem for all of us as we get older. It accounts for the gradual forgetfulness and decline in cognitive skills.
Acute demyelination is the hallmark of diseases like MS and ALS, and - to some degree - Alzheimer's.
Unlike many studies, this one has a clear path from the lab to the doctor's office. The researchers know exactly which protein makes the improvement. And it has been isolated in humans.
It should be possible to do some DNA or RNA editing, and make bacteria produce it, much like they currently produce insulin.
Look at
https://www.statnews.com/2022/05/11/tra ... ng-elixir/