[something98]

> there is an adaptive insulin resistance that preserves glucose for the [specific] brain and heart cells that can’t survive without it.

To be clear, most brain and heart cells do not require glucose to function. Although, a small subset do.

[_yb2s]

which is why I added "the" before "brain and heart cells"....

[CRConrad]

I suppose "those" would have worked even better, because the "the" didn't quite register for me before you pointed it out.