With the 'saturation' attribute you can set how much saturation a food adds, the higher the saturation is the longer you will not loose hunger. Only for food.
Valid values are decimals greather than or equal 0.
Default value: '0.6'
Raw porkchop: '0.3'
Cooked porkchop: '0.8'
saturation=0.2;
saturation=0.8;