The professional skills of a gourmet were actually quite simple and crude, divided into two categories: "how to eat" and "how to find food."
Compared to an ordinary gourmet's "Extraordinary Digestion LV1," the keyword for Glutton's Gluttony LV1 is "greed:" an insatiable hunger.
Feeling hungry faster means that the body craves more nutrition and may even surpass the physical limits it can bear.
A gourmet advances by "eating food imbued with extraordinary factors that are taboo," so faster digestion and hunger means quicker advancement and a faster pace of enhancement; however, it also entails doubled "expenses" and at least doubled pressure to regress.
"Heh, I'm full."
The overflowing sense of fullness made Lu Ping'an burp satisfyingly.
The feeling of fullness in a living being is a reminder that one cannot eat anymore, or they won't be able to digest it.