What Rhubarb Gives Your Body: Key Nutrients And Benefits
What rhubarb gives your body: key nutrients and benefits
Rhubarb nutrition facts reveal a low-calorie vegetable stalk packed with essential vitamins, minerals, and fiber. Per 100 grams of raw rhubarb, you get just 21 calories, 1.8 grams of fiber, 29.3 micrograms of vitamin K (24% DV), 8 milligrams of vitamin C (13% DV), and 86 milligrams of calcium (8.5% DV), making it a nutrient-dense addition to any diet.
Nutritional Profile
Rhubarb stands out as a high nutrient-dense food with a Nutrivore Score of 598, driven by its rich content of polyphenols, vitamin K, vitamin C, and manganese. This perennial vegetable, often mistaken for fruit due to its tart flavor in pies, delivers 26 calories per diced cup (122 grams), including 1.1 grams of protein, 2.2 grams of dietary fiber, and only 3.3 grams of net carbohydrates.
Its mineral profile includes potassium at 288 milligrams per 100 grams (6% DV), magnesium at 14 milligrams, and manganese providing 10% of the daily value, supporting metabolic functions. Vitamins like folate (7 micrograms, 2% DV) and vitamin E (0.27 milligrams, 2% DV) add to its broad spectrum, while trace amounts of B vitamins such as niacin (0.3 milligrams, 2% DV) contribute to energy production.
| Nutrient | Amount per 100g Raw Rhubarb | % Daily Value |
|---|---|---|
| Calories | 21 kcal | - |
| Protein | 0.9 g | 2% |
| Fiber | 1.8 g | 6% |
| Vitamin C | 8 mg | 13% |
| Vitamin K | 29.3 mcg | 24% |
| Calcium | 86 mg | 8.5% |
| Potassium | 288 mg | 6% |
| Manganese | 0.24 mg | 10% |
Key Vitamins and Minerals
Vitamin K in rhubarb reaches 37% of the daily value per serving, crucial for blood clotting and bone metabolism, as noted in a 2023 Nutrivore analysis. This nutrient works synergistically with calcium, which rhubarb provides at levels supporting bone density-86 milligrams per 100 grams-to potentially reduce osteoporosis risk by up to 20% in regular consumers, per observational studies from 2019.
- Vitamin C: 11% DV, bolstering immune function and collagen synthesis for skin health.
- Calcium: 15% DV in some servings, aiding muscle contraction and nerve signaling.
- Potassium: 3-6% DV, helping regulate blood pressure and fluid balance.
- Manganese: 10% DV, essential for antioxidant enzyme activity and bone formation.
- Folate: 2% DV, supporting DNA synthesis and red blood cell production.
Rhubarb's polyphenol content, scoring high in nutrient density metrics, offers antioxidant protection equivalent to 20-50% DV per cup, combating oxidative stress linked to chronic diseases.
Health Benefits
Consuming rhubarb supports bone health through its vitamin K and calcium synergy, with research from Precision Nutrition in 2019 highlighting it as a top source for these nutrients. A 2020 review in PMC traced rhubarb's use back to 270 BC in traditional Chinese medicine, where it aided digestion and detoxification, benefits echoed in modern studies showing fiber content alleviating constipation by 25% in short-term trials.
- Antioxidant boost from polyphenols reduces inflammation markers by 15%, per 2023 data.
- Digestive aid via 2.2 grams fiber per cup promotes gut motility and microbiome diversity.
- Cardiovascular support from potassium helps lower systolic blood pressure by 4-5 mmHg in potassium-rich diets.
- Brain health potential through vitamin C, protecting neurons from oxidative damage.
- Low-calorie profile (21 kcal/100g) aids weight management without sacrificing nutrition.
Dr. Josh Axe noted in a June 2025 update, "Rhubarb is one of the best things for bone health," emphasizing its role in brain-boosting effects via manganese.
"Rhubarb's Nutrivore Score of 598 makes it a super high-dense food!" - Nutrivore, December 2023.
Historical Context
First documented in Shen Nong Ben Cao Jing around 270 BC, rhubarb served as a staple in traditional Chinese medicine for over 2,000 years, primarily for its laxative and detoxifying properties. By the 18th century, it reached Europe, where British growers cultivated it extensively; production peaked in the UK during the 1940s "Dig for Victory" campaign, yielding over 100,000 tons annually by 1945.
A pivotal 1947 U.S. court ruling classified rhubarb as a fruit for tariff purposes, despite its botanical status as a vegetable, boosting its dessert popularity. Modern cultivation data from 2026 shows U.S. farms harvesting 12% more rhubarb since 2020 due to rising demand for low-carb foods.
Preparation Tips
Select bright red stalks for peak sweetness and tenderness; green ones are tarter and stringier, as advised by Precision Nutrition's 2019 encyclopedia. Wash, trim leaves and ends, then chop into 1-inch pieces for cooking-avoid overripe super-thick stalks prone to coarseness.
- Raw: Dice into salads for crunch and tartness (26 calories/cup).
- Stewed: Simmer with minimal sugar for compote; pairs with yogurt.
- Baked: Classic pies or crumbles; 1947 ruling made U.S. desserts affordable.
- Juiced: Blend stalks for low-cal drinks, straining fiber if desired.
- Frozen: Harvest in spring (peak season northern U.S./Canada), freeze up to 12 months.
Historical tip: Victorian Brits forced rhubarb in darkness for tender, hothouse stalks sold at premium prices in 19th-century London markets.
Potential Risks
Rhubarb's oxalic acid (200-500 mg/100g stalks) can inhibit calcium absorption if overconsumed, raising kidney stone risk by 15% in susceptible individuals, per Health.com 2024 data. Pregnant women should cap intake at 1 cup daily, avoiding roots used medicinally since ancient TCM.
| Group | Recommended Serving | Reason |
|---|---|---|
| General Adults | 1-2 cups/day | Balanced nutrients |
| Kidney Stone Prone | ½ cup/day | Oxalate control |
| Pregnant | 1 cup/day | Safety margin |
| Children | ¼-½ cup/day | Portion adjusted |
Seasonal and Sourcing Data
In cool climates like northern U.S. and Canada, rhubarb season runs early spring through June, with 2026 Viva! reports showing peak nutrient density in April-harvested stalks. U.S. production hit 1.2 million pounds in 2025, up 8% from 2024, driven by health trends.
Organic rhubarb tests 25% higher in polyphenols, per Ayurtimes analysis, making local farmers' markets ideal for freshness-look for firm, vibrant red varieties developed post-1940s breeding programs.
Comparative Nutrient Density
Rhubarb outscores spinach in vitamin K (24% vs. 21% DV per 100g) but trails kale in calcium; its low 21-calorie base makes it superior for calorie-conscious eaters. A 2023 Nutrivore comparison ranked it top 10% among vegetables for overall density.
| Food (100g) | Vit K %DV | Calcium mg | Calories |
|---|---|---|---|
| Rhubarb | 24 | 86 | 21 |
| Spinach | 21 | 99 | 23 |
| Kale | 39 | 150 | 49 |
Integrate rhubarb weekly for optimal benefits, as its profile complements berries in smoothies or oats.
What are the most common questions about Rhubarb Nutrition Decoded Calories Fiber Vitamins In One Glance?
Is rhubarb a fruit or vegetable?
Botanically, rhubarb is a vegetable from the Polygonaceae family, but a 1947 U.S. court decision deemed it a fruit for import tariffs, allowing cheaper pies.
Are rhubarb leaves edible?
No, rhubarb leaves contain toxic oxalic acid levels up to 1,000 mg per 100 grams, risking kidney stones; only stalks are safe.
How much rhubarb is safe daily?
Up to 1-2 cups (122-244 grams) raw stalks daily provides benefits without excess oxalates, which bind calcium; limit if prone to stones.
Does cooking rhubarb reduce nutrients?
Cooking retains most vitamin K and fiber but cuts vitamin C by 30%; steaming preserves more than boiling, per 2021 FactDr analysis.
Is rhubarb keto-friendly?
Yes, with 3.3 net carbs per cup, it fits keto diets, offering fiber without spiking blood sugar.
Can rhubarb help with constipation?
Yes, its 8% DV fiber per cup acts as a mild laxative, with TCM using it since 270 BC; studies confirm relief in 70% of mild cases.
Does rhubarb support heart health?
Potassium and antioxidants lower blood pressure and cholesterol oxidation, potentially cutting heart disease risk by 10-12% in high-intake diets.