The phrase "hunger levels" refers to the amount of hunger or how hungry someone feels. It's a way to describe how full or empty their stomach feels and how much they desire to eat. Full definition
SUMMARY: Eating plenty of protein can boost your metabolism and reduce hunger levels, making it a very effective way to lose weight. (healthy-holistic-living.com)
It has been shown to cause a significant reduction in hunger levels. (mediatrendings.com)
We really can trust our babies to eat when they are hungry, and hunger levels change during the course of a day. (milkontap.com)