In "The Brothers Karamazov" by Fyodor Dostoevsky describes sort-of the opposite process. A body of monk who had been considered a living saint started to smell on the second day after his dearth. That made everybody to realize that he was the opposite of the saint. And then another monk mentioned that eating sweets and cakes could not lead to sainthood.

Assuming no supernatural forces, can this sweets adversion be explained by the fat vs muscle ratio in the body?

The peasant child died and didn't stink though. So, I guess he didn't eat a lot sweets I suppose that aligns with his wretched upbringing...