Cauliflower delivers a solid spread of vitamins, with vitamin C as the standout. One cup of raw cauliflower provides roughly 50-55 mg of vitamin C, covering more than half the daily recommended intake for most adults. It also supplies several B vitamins, vitamin K, and a modest amount of choline, making it more nutritionally diverse than many people expect from a pale vegetable.
Vitamin C: The Headline Nutrient
Vitamin C is cauliflower’s strongest vitamin contribution. A single cup of raw florets delivers enough to cover a significant portion of the 75-90 mg daily recommendation for adults. This puts cauliflower in the same league as some citrus fruits on a per-serving basis, which surprises people who associate vitamin C mainly with oranges and peppers.
Cooking method matters here. Boiling cauliflower reduces its vitamin C content by about 36%, because the vitamin dissolves into the cooking water. Steaming is a much better option, cutting vitamin C by only about 14%. If you want to preserve the most nutrition, eat it raw, lightly steamed, or roasted at moderate heat.
B Vitamins in Cauliflower
Cauliflower contains three B vitamins in meaningful amounts. One cup of cooked cauliflower provides about 27 mcg of folate (B9), 0.11 mg of vitamin B6, and 0.31 mg of pantothenic acid (B5). None of these hit a large percentage of daily needs on their own, but they add up when cauliflower is part of a varied diet.
Folate supports cell division and is especially important during pregnancy. Vitamin B6 plays a role in brain development and immune function, while pantothenic acid helps your body convert food into energy. These are all water-soluble vitamins, so the same cooking advice applies: steaming or roasting preserves more than boiling does.
Vitamin K
Cauliflower provides a useful dose of vitamin K, the nutrient your body needs for blood clotting and bone metabolism. A cup of raw cauliflower contains roughly 16 mcg, which covers about 13-18% of the daily adequate intake depending on your sex. It’s not a powerhouse source the way leafy greens are, but it’s a meaningful contributor if you eat cauliflower regularly.
Choline: A Lesser-Known Nutrient
Cauliflower is one of the better plant sources of choline, a nutrient that’s sometimes grouped with B vitamins. A half cup of cooked cauliflower provides about 24 mg. That’s a small fraction of the 425-550 mg daily intake recommended for adults, but choline is hard to find in vegetables at all. Most dietary choline comes from eggs, meat, and fish, so cauliflower stands out among plant foods.
Choline supports liver function, brain health, and muscle movement. Most Americans don’t get enough of it, so every source counts.
Protective Compounds Beyond Vitamins
Cauliflower belongs to the cruciferous vegetable family alongside broccoli, kale, and Brussels sprouts. These vegetables contain sulfur-based compounds called glucosinolates, which give them their slightly bitter, peppery flavor. When you chew or chop cauliflower, those compounds break down into biologically active molecules, including one called sulforaphane.
Sulforaphane activates your body’s own antioxidant defenses, helping cells manage oxidative stress and inflammation. These aren’t vitamins in the traditional sense, but they’re a major reason nutritionists single out cruciferous vegetables as especially beneficial. Cooking reduces glucosinolate levels, with boiling causing greater losses than steaming. Eating cauliflower raw or adding it to dishes after cooking maximizes these compounds.
How Color Changes the Vitamin Profile
White cauliflower is the most common, but orange and purple varieties offer bonus nutrients. Orange cauliflower resulted from a natural genetic mutation that allows the plant to hold more beta-carotene, the pigment your body converts into vitamin A. White cauliflower has almost no beta-carotene, so the orange variety fills a genuine nutritional gap.
Purple cauliflower gets its color from anthocyanins, the same antioxidant pigments found in blueberries and red cabbage. These aren’t vitamins either, but they add another layer of protective plant compounds on top of the standard vitamin lineup. If you spot colored cauliflower at the store, it’s nutritionally worth choosing over white.