BOSTON -- In addition to flu clinics across the state, people are likely to see many different products that claim to prevent the flu. But do any of these products work?

NewsCenter 5's Heather Unruh reported that most doctors say that the best way to protect yourself from the flu is to get the flu vaccine.

But Chris Bernardi, who works in an herbal pharmacy, turns to alternative flu remedies to keep his family healthy. He said he takes oscillococcinum.

"We take it basically as a preventative measure," said Bernardi.

Oscillococcinum is one of the hottest-selling homeopathic flu remedies on store shelves, pharmacists said.

"For most people, within 24 hours, the fever is down. And within 48 hours, they're feeling much better," said pharmacist Gary Kracoff.

Two products new to the market include Host Defense and Lifeshield. Kracoff recommends them to his customers. He said studies done by the military show they work and are safe.

"If you use it every day, it does help prevent bacterial and viral infections," Kracoff said.

Oscilla, HostDefense and Lifeshield are regulated by the Food and Drug Administration, so they're safe and have no known side effects and can be given to children over 2 years old. But some question whether or not these remedies, which tend to be pricey, actually work.

"The data that I've seen, the medical research that I've seen have not been beneficial to prevent the flu," said Dr. Jonathan Snider of Newton-Wellesley Hospital.

Snider admitted that the products may help alleviate symptoms and they probably won't hurt people, but recommended the vaccine.

"The one way to prevent the flu is the flu shot," said Snider.

Before taking any herbal remedies, people should check with their doctor first because some may interact with other medications.