Kohlrabi – Nutrients, Health Benefits and Uses
Kohlrabi is a nutrient-rich vegetable from the cabbage family, high in vitamin C, dietary fiber, and antioxidants – perfect for a balanced and healthy diet.
Things worth knowing about "Kohlrabi"
Kohlrabi is a nutrient-rich vegetable from the cabbage family, high in vitamin C, dietary fiber, and antioxidants – perfect for a balanced and healthy diet.
What is Kohlrabi?
Kohlrabi (botanical name: Brassica oleracea var. gongylodes) is a popular vegetable belonging to the cruciferous family (Brassicaceae), closely related to broccoli, cauliflower, and cabbage. It is characterized by its bulb-like enlarged stem, which can grow above or below ground. Kohlrabi is available in two main varieties: pale green and purple. Both have a mild, slightly sweet flavor and a crunchy texture.
Nutritional Profile
Kohlrabi is low in calories yet rich in essential nutrients. A typical 100 g serving of raw kohlrabi contains approximately:
- Calories: approx. 27 kcal
- Carbohydrates: approx. 6 g
- Dietary fiber: approx. 3.6 g
- Protein: approx. 1.7 g
- Fat: less than 0.2 g
- Vitamin C: approx. 62 mg (over 60% of the recommended daily intake)
- Potassium: approx. 350 mg
- Vitamin B6, folate, and manganese
Bioactive Compounds
Kohlrabi contains several bioactive plant compounds responsible for its health-promoting properties:
- Glucosinolates: Sulfur-containing compounds that are converted into isothiocyanates during chewing or chopping. These compounds are being studied for their potential cancer-preventive effects.
- Anthocyanins: Found in the purple variety; powerful antioxidants that protect cells from oxidative stress.
- Polyphenols: Plant-based antioxidants with anti-inflammatory properties.
- Vitamin C: A key antioxidant that supports immune function and collagen synthesis.
Health Benefits
Immune System Support
Due to its high vitamin C content, kohlrabi supports normal immune system function. Vitamin C plays an important role in the production of immune cells and acts as an antioxidant, neutralizing harmful free radicals.
Digestive Health
The high fiber content of kohlrabi promotes a healthy gut microbiome, supports bowel motility, and may reduce the risk of constipation. Dietary fiber also acts as a prebiotic, feeding beneficial gut bacteria.
Heart Health
Potassium found in kohlrabi helps regulate blood pressure. The antioxidants in kohlrabi can help reduce inflammation, potentially lowering the risk of cardiovascular disease.
Weight Management
Kohlrabi is low in calories, filling, and has a low glycemic index – making it an excellent choice for those managing their weight.
Cancer Prevention (Research Status)
The glucosinolates found in kohlrabi and their breakdown products are being actively investigated in scientific studies for their potential role in cancer prevention. Current findings are promising, but further clinical trials are needed to confirm these effects.
Typical Serving Size and Usage
Kohlrabi can be enjoyed raw, steamed, roasted, or added to soups and stews. The leaves are also edible and nutritious. A typical serving size is 100–150 g per meal. Raw kohlrabi makes an excellent snack, salad ingredient, or side dish.
Scientific Evidence
Numerous studies support the health benefits of consuming cruciferous vegetables, the family to which kohlrabi belongs. The WHO and various national nutrition societies recommend regular consumption of cruciferous vegetables as part of a balanced diet.
References
- World Health Organization (WHO) – Diet, Nutrition and the Prevention of Chronic Diseases. WHO Technical Report Series 916, 2003.
- Higdon J et al. – Cruciferous Vegetables and Human Cancer Risk: Epidemiologic Evidence and Mechanistic Basis. Pharmacological Research, 2007; 55(3):224–236.
- U.S. Department of Agriculture (USDA) – FoodData Central: Kohlrabi, raw. Available at: fdc.nal.usda.gov, 2023.
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