You already know Cora, we adorya, but let me say it again.
Frm that link: "The brain, retina and heart amass lipofuscin (ly-po-fusk-in) pigments."
Lipofuscin. Somtimes spelled lipofusin too.
I'd like y'all to think about that one a little and maybe do a quick search and find out a little about it if you have time.
Then, we can talk about getting rid of it. Sardi isn't quite correct when he calls it a pigment, as you will find out. If you get stuck , lemme know :)