Definition

• The Food and Agriculture Organization defines good bacteria as living microbes that at healthy amounts can benefit the recipient.
  
  

Types

• Types of good bacteria include Lactobacillus acidophilus, Lactobacillus casei, Bifidobacterium bifidum and Streptococcus thermophiles.
  
  

Digestion

• Good bacteria help your body digest and absorb nutrients. They can also inhibit some dangerous bacteria, including those that cause antibiotic-induced diarrhea and traveler's diarrhea.
  
  

Immune System

• The environment in our guts has been linked to the functioning of our immune systems. Friendly bacteria provide a healthy boost.
  
  

Sources

• Good sources of friendly bacteria include yogurt, kefir, miso, tempeh and acidophilus milk. Alternatively, you can purchase good bacteria in pill form, and some products are fortified with these bacteria.
  
  

Considerations

• Probiotic safety has not been proven in young children, the elderly or people with an impaired immune system. Discuss taking supplements with a health care provider.