you body can absorb pretty much every thing.gain +20 hp and +5 ac if your con score is above 19.you gain special hearts the block incoming damage.the damage is reduced to one absorption health per attack.+40 hp.+10 speed.healing potion give you double hp.eatin good gives you 5 hp per different food eaten at one sitting.you get 5 absorption health.+1 per 5 ft of speed.+1 absorption heart per ability score above 16.+1 absorption heart per 30 hp you have.