Eating the same food over and over again without changing things up also increases the Gluttony score slightly. Eating healthy things will decrease the Gluttony score.
Viewing post in Black Garden (Alpha 0.1.9b) comments
so i found out a nice trick here where i can always eat food to replenish my stuff. i planted some tea trees, apple trees and potato seeds in my house, harvested em and i cooked the shit out of lechos and teas. so whenever i need to refill VP and WP i just eat one lecho and drink one tea and i keep repeating the process till either my WP or VP is full. it's pretty helpful (please don't change this xD)