Cabbage is one variety of the Brassica oleracea plant. It's related to broccoli, Brussels sprout, cauliflower, and kale. It's commonly eaten as a vegetable.

Different types of cabbage are grown for food. Cabbage leaf contains high amounts of vitamin K1, as well as other nutrients. It also contains chemicals that might help prevent cancer and help with wound healing.

People use cabbage for hard, painful breasts during breastfeeding. It is also used for cancer, knee pain, osteoarthritis , and many other conditions, but there is no good scientific evidence to support these uses.

Don't confuse cabbage with other varieties of the Brassica oleracea species, including broccoli, broccoli sprout, Brussels sprout, cauliflower, collard, kale, and kohlrabi. These are not the same.