6 Ways to Fight the Flu You Probably Overlooked
According to the CDC, influenza sends hundreds of thousands of Americans to the hospital every year. Here's how to make sure you don't follow them this year.
By Dr. Mehmet Oz
Get more vitamin D.
A study in the Archives of Internal Medicine revealed that adults with the lowest blood levels of vitamin D were 36 percent likelier to report having an upper respiratory infection in the previous few days than those with the highest levels. Research has shown that vitamin D plays a key role in immune function. To help get your fill, consume more fatty fish like tuna and salmon—both are good sources of the vitamin.
From the December 2015 issue of O, The Oprah Magazine