It's heralded as a new cure for inflammation, seizures and anxiety; CBD is made from a form of cannabis. CBD or cannabidiol is controversial but legal. It's extracted from hemp.

The Green Goddess Cafe in Stowe is known for its healthy food and now the owners plan to add CBD oil to food on the menu. Owners Tim Callahan and Athena Scheidet will give customers the option of adding 10 milligrams of CBD oil to some of their drinks.

Callahan says he takes 60 milligrams a day, six times what would be served in one of his smoothies.

"I take it for chronic joint inflammation and I feel it helps tremendously," he said.

Callahan and Scheidet tell me their 3-year-old son uses it, too. He has autism. They say it helps him stay calm and focused.

"People have used it to treat a wide array of conditions. So, it's something to research themselves if CBD oil can help them, and to see for themselves if it's going to help alleviate symptoms. We aren't doctors. We don't claim it's a cure-all for anything. It's up to people to research themselves and it's not for everybody," Callahan said.

"If you put CBD into foods it can still be active in the body," said Dr. Karen Lounsbury, a professor of pharmacology at the University of Vermont Larner College of Medicine.

Lounsbury says hemp and marijuana look alike but these cannabis cousins are different. CBD, which comes from hemp, cannot have more than trace amounts of THC, which is why you won't get high. She says most marijuana has 5 percent to 10 percent THC.

In terms of safety, Lounsbury says limited studies show no major side effects but a person's mindset plays a big part. She explains the placebo effect.

"It has an effect and it's not really doing anything, but you think it does and CBD has that possibility. But there is the other side, because of all the stigma associated with marijuana that somebody might take it and say this is not going to work and that's called a nocebo effect," Lounsbury said.

At the Green Goddess Cafe, Callahan and Scheidet are still working out how much to charge for the anti-inflammatory drinks. But if CBD is not your thing, they will still be serving up regular smoothies.

It's still unclear how much CBD you would need to achieve therapeutic results.

The U.K. has made CBD a medicine, which would restrict places like the Green Goddess Cafe from putting it in foods or drinks or require them to disclose dosages on the label. In the United States, the Food and Drug Administration has not come out with a stance.