While worn, it restores Sanity by 2/min and reduces Hunger loss by 40%.
Using the belt with characters that lose Hunger at a normal rate (75/day) will make them lose only 45 points per day. Wolfgang's normal form will lose 67.5 while his mighty form will lose 135/day, and Wes will lose 56.25/day.
Because Slurpers do not respawn, it's recommended to use the Sewing Kit on the Belt of Hunger to repair it rather than letting it degrade and crafting a new one.
This item is excellent for Wolfgang, as it completely nullifies his hunger problems.
The Belt of Hunger is also useful for Wigfrid, since her inability to eat non-Meaty foods can be very risky, especially when traveling to distant places from camp.