Fable the lost chapters - High health no XP

The first time I can think of that you can do this is on the Orchard Farm quest (if you get your level high enough to do the Hobbe killing contest earlier you can do it then)
You will also need a fishing rod.

Take the quest and then go to Orchard Farm, you should find a puddle of water with ripples in it showing that something is there. Fish in this spot and you should get an elixir of life, now drink the potion and hero save, then load and you should still have the effect of the potion and still be able to get it again.

drink about five and you will have a boost to your health.