Currently there are more than 55 million people living with dementia worldwide.

That number is expected to double every 20 years.

TV5's Collette Boyd shows us the new research and some surprising bad habits that may increase your risk of getting dementia.

Did you know sitting for long periods of time at work or home doesn't just increase your risk for obesity, heart disease, and diabetes, but it can also raise your risk for dementia.

Researchers at UCLA found sitting for at least 12 hours a day increases your risk by 63 percent.

The data is pretty solid that physical activity and exercise helps maintain brain health.

Poor oral hygiene is also a factor.

A study looked at 144 participants in Milwaukee and found severe tooth loss increased their dementia risk six times more than people who lost fewer teeth.

We all know that the mouth is the gateway to the rest of the body so if we can clean our mouths properly we can certainly have a tremendous effect not only in dentistry but also in overall health.

Other bad habits include not getting seven to nine hours of sleep per night, drinking too much alcohol, and isolating yourself.

The effect of social isolation and loneliness on our health is as powerful as things like smoking, high blood pressure, obesity.

So get some shut-eye, drink in moderation, and call a friend to keep your brain in tip-top shape.

I'm Colette Boyd reporting.

Skipping vaccines could also increase your dementia risk.

A study found those over 65 who got a flu shot lowered their risk for Alzheimer's, the common form of pneumonia vaccine were 30% less likely to develop dementia.