why does large intakes of certain things cause death when small intakes cure things?:)

Question: why does large intakes of certain things cause death when small intakes cure things?:)
- Keywords:
  cure,
  death,
  large,
  small
Asked by anon-200735 to Rosemary, Oliver, Leigh, Jordan, Hannah, David on 14 Mar 2019.
- Oliver Gordon answered on 14 Mar 2019: last edited 14 Mar 2019 1:33 pm
  
  The human body is a remarkably delicate machine. If the temperature inside you raises by 5 degrees, your life is in a very real danger. Taking a small amount of a medicine like aspirin can help with your headache because it does “just” enough to put your body back on track. Too much and you go too far the other way.
  
  Think of it like an ocean – drinking a glass of water helps you, but being submerged under an ocean isn’t!

Question: why does large intakes of certain things cause death when small intakes cure things?:)