Cabbage is one of the most nutrient-dense vegetables you can buy for the price. A single cup of raw green cabbage (about 89 grams) contains roughly 22 calories, 2.2 grams of fiber, and over half your daily vitamin C needs, along with meaningful amounts of vitamin K, folate, and potassium. But the real nutritional story goes beyond the standard label: cabbage contains sulfur-based compounds linked to cancer prevention, heart protection, and reduced inflammation.
Vitamins and Minerals in Cabbage
Vitamin C is the standout micronutrient. A cup of raw chopped cabbage delivers around 30 to 37 milligrams, covering roughly 35 to 40% of the daily recommended intake for most adults. That makes cabbage a surprisingly strong source, especially considering how inexpensive it is compared to citrus or bell peppers.
Vitamin K is the other big contributor. Green cabbage provides a substantial dose per serving, enough that it lands on the American Heart Association’s list of foods containing 60 or more micrograms per serving. This matters most if you take blood-thinning medication like warfarin: the key is not to avoid cabbage but to eat it consistently so your vitamin K intake stays stable from day to day. Red cabbage, interestingly, falls in a lower category at under 35 micrograms per serving.
Beyond those two, cabbage supplies folate (important for cell function and especially critical during pregnancy), manganese, vitamin B6, and calcium in smaller but useful amounts. Napa cabbage, the elongated variety common in East Asian cooking, has a slightly higher folate content than green cabbage, though the overall nutritional profiles of all common cabbage types are quite similar.
Red Cabbage vs. Green Cabbage
Red cabbage wins on antioxidants by a wide margin. Its deep purple color comes from anthocyanins, the same pigments found in blueberries and red wine. Red cabbage juice contains about 34 milligrams of anthocyanins per 100 milliliters, while green cabbage has essentially none. Anthocyanins act as powerful antioxidants in the body, helping neutralize cell-damaging molecules.
Red cabbage also edges out green in vitamin C. In one direct comparison, red cabbage juice contained about 30.5 milligrams of vitamin C per 100 milliliters compared to 21.7 milligrams in green cabbage juice, a roughly 40% advantage. If you’re choosing between the two for a raw salad or slaw, red cabbage gives you more nutritional return per bite. Green cabbage remains an excellent choice and tends to be milder in flavor, which makes it more versatile in cooking.
Sulfur Compounds and Cancer Prevention
What makes cabbage genuinely distinctive among vegetables is its glucosinolate content. These are sulfur-containing compounds (responsible for that slightly bitter, peppery taste) that break down during chewing and digestion into smaller molecules called isothiocyanates and indoles. These breakdown products are what researchers have linked to anti-cancer, anti-inflammatory, and heart-protective effects.
The most studied of these is sulforaphane. In lab studies, sulforaphane reduced the viability of prostate cancer cells by 40 to 60% over 72 hours and cut the ability of those cells to spread by up to 50%. In heart muscle cells, it lowered oxidative stress markers by 40% and boosted the body’s own antioxidant defenses. These are cell and animal studies, not proof that eating cabbage cures cancer, but the consistency of the evidence across dozens of studies is why cruciferous vegetables show up so frequently in dietary guidelines for cancer risk reduction.
Importantly, these compounds are activated by an enzyme called myrosinase, which is present in the raw plant but gets destroyed by heat. Research on broccoli (a close relative with the same compounds) found that eating it raw delivered a sulforaphane bioavailability of 37%, compared to just 3.4% when cooked. The raw version also hit peak blood levels in about 1.6 hours versus 6 hours for cooked. This doesn’t mean cooked cabbage is worthless, but it does mean that including some raw cabbage in your diet, whether in coleslaw, salads, or wraps, gives you significantly more of these protective compounds.
Fiber and Digestive Health
Cabbage contains about 30 grams of total dietary fiber per 100 grams of dry matter, which translates to roughly 2 to 3 grams per cup of raw cabbage given its high water content. That fiber is a mix of two types: insoluble fiber (mainly cellulose, which adds bulk and helps keep things moving through your digestive tract) and soluble fiber (including pectins and hemicelluloses, which feed beneficial gut bacteria).
The soluble fiber is particularly interesting for gut health. When it reaches your large intestine undigested, resident bacteria ferment it and produce short-chain fatty acids, which nourish the cells lining your colon and help maintain a healthy gut barrier. This fermentation process also promotes the growth of beneficial bacterial species like Bifidobacterium and Lactobacillus while competing against potentially harmful organisms. The insoluble fiber, meanwhile, supports regular bowel movements and helps prevent constipation. Together, they make cabbage a solid everyday food for digestive regularity.
How Cooking Affects Nutrition
The way you prepare cabbage significantly changes what you get out of it. Boiling is the most destructive method for water-soluble vitamins. Studies on vegetables broadly show that boiling can reduce vitamin C retention to as low as 0% in some cases, with retention generally ranging up to about 74% depending on cooking time and water volume. The vitamin C leaches into the cooking water, so if you’re making soup and consuming the broth, you recover some of it.
Steaming is a better option, preserving more vitamin C than boiling in most vegetables, with retention rates reaching up to about 89%. Microwaving tends to perform even better for vitamin C retention because it uses less water and shorter cooking times. Stir-frying and sautéing fall somewhere in between, with the advantage of speed reducing exposure to heat.
For maximum nutrition, your best approach is variety: eat cabbage raw when you can (to preserve vitamin C and activate those cancer-fighting sulfur compounds), and when you do cook it, favor steaming, microwaving, or quick sautéing over prolonged boiling. Even cooked cabbage retains its fiber, vitamin K, and minerals, so no preparation method makes it a poor choice.
Fermented Cabbage
Sauerkraut and kimchi transform cabbage through lactofermentation, a process where naturally present bacteria convert sugars into lactic acid. This does two things nutritionally: it introduces live probiotic bacteria (the same types of beneficial microbes your gut needs) and it partially breaks down the cabbage’s fiber, potentially making some nutrients easier to absorb. Fermented cabbage retains much of the original vegetable’s vitamin and mineral content while adding the digestive benefits of live cultures. The trade-off is sodium, since salt is essential to the fermentation process. If you’re watching salt intake, rinse sauerkraut briefly before eating or look for lower-sodium varieties.