A recent study from the U.S National Library of Medicine reveals more than 90 percent of people who work desk jobs indoors have below average levels of Vitamin D.

Physician Roberta Weintrout from Navicent Health offers her professional advice on how to defeat that deficiency.

Spending too much time behind the desk can put you at risk for too little Vitamin D.

The reason is simple.

"People who don't get much sun, don't get much vitamin D," said Weintrout.

Vitamin D, also knowm as the "sunshine vitamin," is essential for maintaining good health.

Below normal levels can preempt a slew of health problems.

"We know we need a good amount of Vitamin D to make normal bones. That's undisputed," said Weintrout. "There's some research that says we need Vitamin D levels to be normal to have normal blood pressures, normal immune function, normal mental health, as well as skin health."

Sun isn't the only savior.

Adding certain foods to your diet can help boost vitamin D levels too.

Though not a lengthy list, Weintrout advises adding certain foods such as fatty fish -- salmon, tuna, mackerel -- and fortified dairy products to your diet if vitamin D levels are low.

To find out if you have below average Vitamin D levels, head to your doctor for a simple blood test.