Bryan Johnson· Author
the thymus is a gland in the chest which gets smaller and less effective with age
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the thymus is a gland in the chest which gets smaller and less effective with age
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so your thymus is this organ right behind your sternum which is responsible for your immune system it's really really important uh a worn down thymus is uh one of the reasons why people die in older age their immune system just is not robust enough
So after age 50 in most people you find it um very small. Now the the whereas it when you're young it's a it's actually you can see it on an imaging study and I I would imagine if you and I had a CT scan of the chest you'd barely be able to pick it up. Exactly. And it's replaced by fat actually in most people as you age.
I mean, for example, well, let's take the thymus for example. The thymus itself shrinks, as we were saying earlier, and that is largely responsible for the fact that in an older person, there are fewer naive T cells and more memory T cells. You know, if we can fix the thymus, then we fix that problem.