Gut bacteria

• Where do lots of bacteria live in the human body?

  In the digestive system
• What is the role of gut bacteria in the digestive system?

  They maintain balance and prevent overgrowth
• What do gut bacteria receive from humans?

  Shelter and nutrients
• What do gut bacteria supply to humans?

  Vitamins and hormones
• How do gut bacteria help reduce infections?

  By outcompeting invading micro-organisms
• What do gut bacteria produce that helps kill other microbes?

  Chemicals
• What can cause an imbalance of gut bacteria?

  Overuse of antibiotics and poor diet
• What are the potential consequences of an imbalance in gut bacteria?

  Health problems and obesity