Cauliflower, a cruciferous vegetable, delivers fiber, vitamin C, vitamin K, and antioxidants. People eat it as a whole food, not as a supplement, and it fits easily into a balanced diet.
You can eat cauliflower raw or cooked. The fiber content supports digestive health, similar to other fiber-rich foods. Outside of a nutritious diet, cauliflower has no known isolated supplemental benefits.
Cauliflower contains vitamin K, so it can interfere with blood thinners such as warfarin. Goitrogens in cauliflower might affect thyroid function in susceptible people who eat very large amounts. Some people experience gas or bloating from its fermentable fiber.