It’s well proven that cancer is a metabolic shutdown. Cancer is a cellular transformation of energy from performing specific necessary tasks to the creation of useless cancer tissue.
Metabolic syndrome is more of the same energy shutdown. That said, what evidence do these researchers think they have that this post-cancer metabolic syndrome is not just a continuation of the metabolic syndrome which produced the cancer?
I’m not sure you can blame this on the “fat cells” per se.
Even if you’re just targeting specific areas with radiation you’ve still got blood moving through the area. I’d posit the radiated blood is affecting the liver, kidneys or pancreas which affects the metabolic profile of the fat.
Still no superpowers though...
There’s never a panacea.
DEARE, delayed effect of acute radiation exposure. It’s a real thing.