What are cruciferous vegetables?
Cruciferous vegetables are part of the Brassica genus of plants. They include the following vegetables, among others:
- Bok choy
- Brussels sprouts
- Collard greens
Are cruciferous vegetables part of a healthy diet?
The federal government’s Dietary Guidelines for Americans 2015-2020 recommends consuming a variety of vegetables each day. Different vegetables are rich in different nutrients.
Vegetables are categorized into five subgroups: dark-green, red and orange, beans and peas (legumes), starchy, and other vegetables. Cruciferous vegetables fall into the “dark-green vegetables” category and the “other vegetables” category. More information about vegetables and diet, including how much of these foods should be eaten daily or weekly, is available from the U.S. Department of Agriculture website, Choose My Plate.
Higher consumption of vegetables in general may protect against some diseases, including some types of cancer. However, when researchers try to distinguish cruciferous vegetables from other foods in the diet, it can be challenging to get clear results because study participants may have trouble remembering precisely what they ate. Also, people who eat cruciferous vegetables may be more likely than people who don’t to have other healthy behaviors that reduce disease risk. It is also possible that some people, because of their genetic background, metabolize dietary isothiocyanates differently. However, research has not yet revealed a specific group of people who, because of their genetics, benefit more than other people from eating cruciferous vegetables.