HEALTH TOPICS 
The growing role of probiotics
You need these "good" bacteria from fermented foods to help maintain a healthy gut.
Image: © marekuliasz/Thinkstock
In spite of what you may think, bacteria can be good for your health.
For instance, your gut is home to trillions of bacteria — both good and bad. Besides helping with digestion, good bacteria help the gut boost your immune system to help fight infections and out-of-control inflammation.
To continue reading this article, you must log in.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- Research health conditions
- Check your symptoms
- Prepare for a doctor's visit or test
- Find the best treatments and procedures for you
- Explore options for better nutrition and exercise