Dr. Marc Breedlove

And that's, of course, really important for coming up with conclusions.

And they concluded that, in fact, the men who were getting testosterone definitely reported

feeling better, feeling more energetic, having a higher libido, and they definitely felt better overall.

And Julian said, sort of the joke is that even though men were supposed to be blind to which treatment they were getting, they always knew.

They always knew when they were getting the testosterone because they felt so much better.

So we know for certain that testosterone does have effects on the adult brain.

In many of these cases, right, these were men's prostate cancer cases who were elderly yet, and they still responded to that.

No, I agree.

I mean, if it ain't broke, you know, leave it alone.

But you also point out why humans are such lousy research subjects.

because there's so much variability going on.

So what I can say is that for the decline in testosterone levels in men, first of all, it's so much more gradual compared to what happens to women at menopause, right?

There's no comparison whatsoever.

And there is an incredible amount of variation across subjects.

And so once again, even though you can say statistically we know this is a trend,

I can't make it.

You tell me someone 71 years old just to pick on me, I can't predict what their testosterone levels are going to be like or not very well.

Everything on the internet is true.

I agree.

Well, and of course, there's no doubt that the younger brain is more plastic.