Buying organic vegetables might make you feel safer about avoiding chemicals and better for possibly helping the planet, but the food won't be any more healthful, according to research in the Journal of the Science of Food and Agriculture.

The report, from the University of Copenhagen, said there is no evidence that organically grown crops contain more major and trace elements, though they can cost one-third more than other produce.

For the study, animals were fed carrots, kale, peas, apples and potatoes grown three different ways over two seasons.

One group was fertilized only with manure, a second was given manure and pesticides, and a third was given chemical fertilizer and pesticides.

After harvest, results showed that there were no differences in the levels of nutrients, a news release on the report said. Researchers also saw no difference in the minerals retained by the animals that ate them.