Hunger

Note that Hunger and Energy are different things.
Hunger is only related to FEP bar. Energy is different thing.
== Hunger Levels ==
Unlike legacy haven hunger levels are NOT effected by ingame activities other than eating foods. Hunger level only decreases over real time depending on your hunger level. 
Each food has a hunger value that adds up when eaten to change your Hunger Level once at 100%. Each subsequent hunger level has a lower "Food efficiency" bonuses, but takes less time to return to a lower hunger level. 
The hunger level of food is a flat rate, unaffected by quality.
Hunger Level	Food Efficiency	Approx time to lose 1% hunger	Approx time to lose 100% hunger	Variety Bonus	Variety Example @15 max stat
Ravenous 	300% 	2 hours 	200 hours 	1.097 	28.3%
Famished 	200% 	1 hour 	100 hours 	0.894 	23.1%
Hungry 	100% 	20 minutes 	33.3 hours 	0.632 	16.3%
Content 	90% 	10 minutes 	16.67 hours 	0.602 	15.5%
Full 	50% 	3 minutes 	5 hours 	0.447 	11.5%
Stuffed 	25% 	46 seconds 	1.25 hours 	0.315 	8.1%
Overstuffed 	10% 	7 seconds 	0.19 hours 	 	
== Food Efficiency ==
This value is effectively the same as the "food event bonus" also given on some Symbel. It multiplies the FEP value of the food you eat to be either positive or negative by the percentage shown. It also positively effects Variety bonus see below
== Effect of Food Quality == 
As of World 10, quality of the food has no effect on the hunger filled. (Section left temporarily for refernce.)
== Variety Bonus == 
Jorb posted that variety bonus effect by food efficiency here . This bonus works simularly to legacy where each new food type eaten will decrease the amount of FEPs in order to level-up an attribute. It is increased by higher food efficiency, but is also reduced by your highest Base attribute (max stat). 
== Variety math and example == 
To work out the variety bonus at Famished's 200% food efficiency, we take the value from the chart and multiply it by the squareroot of our example max stat 15:
 0.894 * \sqrt{15} = 3.46 
This means that our fep requirement is reduced by 3.46, which is 28.3% of our max fep requirement of 15.
If our max stat is 40 the reduction is instead 5.6, which is now only 14.1% of our max.
== Symbel Bonuses ==
Eating at a table and chair provide hunger reductions. Equipping the table with various Symbel items further improve the reduction. Please see the appropriate articles on specific item values. 
The match is fairly straightforward of hunger filled times the table's displayed hunger mod (when sitting in a chair, not just having the table open). For example, Johnny Hearthlander's table provides a 75% hunger bonus. The food he eats fills 10% hunger. Modified, it will only be 7.5%