Your gut does much more than digest your food, research shows.

Each busy micro-universe is unique, depending on our own particular mix of bacteria.

According to a growing stack of studies, our gut bacteria affect much more than digestion.

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And balancing the beneficial bacteria with the harmful bugs is key to keeping your gut happy and humming along.

Helps with Weight Loss

Animal studies have shown a link between weight and gut health.

Now, a new Swedish study of more than 600 people adds to the evidence.

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The researchers identified four types of gut bacteria directly related to a person’s BMI.

The more of these “bad” bacteria participants had, the larger their waists.

The scientists hope to learn how changing the mix of gut bacteria can help lower the risk of obesity.

Improves Heart Health

It’s truer than you might think: the way to your heartisthrough your stomach.

you’re able to thank your healthy gut for helping fight those flu bugs.

“The immune system stems from the gut,” King says.

Watch: What Does a High-Fiber Day Look Like?

Some original reporting by Lori Kase and Gretel H. Schueller