TomeNET

(7.16a) Nutrition details                                                       
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This should probably go to the 'Items' chapter, but I prefer it here as
subchapter following food consumption explanation.

List of nutrients, weight, and nutrients per lb weight for various food types.
Food types can be either 'food', 'potion' or 'firestone' class items.

Food                               Weight (lb)     Nutrients    Nutrients/0.1lb
-------------------------------------------------------------------------------
Mushrooms                              0.1              500            500
Mushroom of Restoring                  0.1             1000           1000

Ration                                 1.0             5000            500
Biscuit                                0.2             1500            750
Venison                                0.3             2000           ~667
Lembas                                 0.3           =14999          ~5000
Slime Mold                             0.5             3000            600
Ale                                    0.5              500            100
Wine                                   1.0             1000            100
Fortune Cookie                         0.2              500            250
Sprig of Athelas                       0.2                0              0

Potato                                 0.2             1250            750
Cabbage                                0.3             1650            550
Carrot                                 0.1              750            750
Beet                                   0.1             1000           1000
Squash                                 0.3             1000           ~333
Corn                                   0.2             2000           1000

Firestones                           10,20                0              0

Potion (0.4lb)             Nutrients   |   Potion (0.4lb)             Nutrients
---------------------------------------+---------------------------------------
Salt Water                      0      |   Curing                        100*
Fresh Water (Ents)           1500      |   Invulnerability             -2500
           (Other)              0      |   Cure Light Wounds              50*
Blood (True Vampires)        5000      |   Cure Serious Wounds           100*
      (Suscept-Life)         1250      |   Cure Critical Wounds          100*
      (Other)                   0      |   Healing                       225*
Apple Juice                   250*     |   *Healing*                     400*
Slime Mold Juice              400*     |   Life                         1000*
Slowness                       50*     |   Resistance                    100*
Sleep                         100*     |   Booze                          50*

(*) Double this amount for Ents

- All potions weigh 0.4 lbs. Drinking from a fountain is the same as quaffing
  a potion of the same type or drinking directly from open water sources,
  except for salt water: When drinking a potion or from a fountain this can
  have adverse effects, poisoning Ents and make other races vomit.
  But when sipping from the open sea, these negative effects will not happen,
  assuming the character is more careful. Fresh water nourishment is the same.

- A 'Scroll of Satisfy Hunger' (weighs 0.5 lb) and Lembas set the food state
  of the character to the maximum "full" state right before "bloated" state,
  ie to 14999. Scroll and Lembas do not work for Ents or true Vampires.

- Ents gain double nourishment from fountains and potions and specifically 1500
  if it's (fresh) water. Salt water gives no nourishment even to Ents.

- Vampire race characters gain no nourishment from any food, potions or
  fountains except for fountains/potions of blood. Other characters gain no
  nourishment from blood.

- Susceptible-to-life characters gain 2/3 nourishment from fountains and
  potions, and 1/3 nourishmnt from other food.

Alternative means of feeding
----------------------------
Ents can also feed by rooting into the ground, depending on the ground type.
Vampires usually feed simply by killing an enemy that is on an grid adjacent
to them.
The amount of nutrition they get out of these methods is as follows:

Ent rooting (initiated by 'Resting' mode via Shift+R) will provide nutrients
in intervals of 5/6 of a player's "dungeon turn" which corresponds roughly to
half a second on the world surface, and ticks slower the deeper the level:
- On water (except tainted water) or mud: 200 nutrients.
- On grass or dirt: 100 nutrients.
- On bush or tree grids: 70 nutrients.

Vampire victim feeding (by killing anything adjacent to them, by any means):
- Depending on the victim's original HP (ie max HP, when it was not hurt yet)
  the vampire drinks 300...600 nutrients,
- demons only give half as many nutrients,
- angels only give a third as many nutrients.
- if the killing blow was a backstab, the amount of nutrients is doubled.
- it's impossible to feed from undead, non-living and some other creatures.