Stanford University researchers contend in a new study there is not much nutritional difference between organic and conventionally grown foods.

So WBEZ asked shoppers at two Chicago-area Whole Foods Markets if this finding makes them think twice about buying organic.

“I think it’s healthier.”

“It’s almost like a religion.”

“When I buy here, I think I’m getting better quality and I’m being more health conscious.”

“They bring this stuff out and it’s like three times as much as other stuff. I mean it doesn’t take that much to grow.”

“A lot of the times the produce that is not organic tastes a lot better than the organic.”

“I feel good buying organic. I buy brown eggs—no real reason for that either.”

“I don’t know what’s good for you and what’s not good for you.”

“For lunch, I think I’ll still come here—for grocery shopping, no I won’t […] If there’s not a difference, why pay all the extra money?”

Researchers say organically grown food can also reduce the risk of eating harmful pesticides.

According to the Organic Trade Association, the U.S. organic food industry reached $31.5 billion in sales in 2011.