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Beetroot
CautionRote Bete · (Beta vulgaris subsp. vulgaris var. conditiva)
Amaranth family (Amaranthaceae)
Description
Beetroot is the swollen-root form of the beet, and its betalain pigment betanin stains deep red everything it touches — as a food colouring the same substance carries the number E 162. It is lifted from summer into late autumn. Grated raw it supplies the most folate and nitrate; cooked, its cell walls break down and the pigments become more available. The best-studied form is the juice: several controlled trials found systolic blood pressure lower by 3 to 10 mmHg after regular consumption, along with improved endurance performance — the basis being the conversion of nitrate into nitric oxide, which widens the blood vessels. The leaves are fully edible too and contain more iron and calcium than the root itself. Harmless but surprising: in roughly one person in eight, the urine turns red after a meal of beetroot.
Raw grated beetroot (e.g. as a crudité salad with lemon and olive oil) delivers betalains, folate, manganese and nitrate at maximum concentration, as heat partially degrades these compounds. Folk tradition values raw beetroot as a liver-supportive and digestion-aiding vegetable. The skin is edible if well scrubbed and also contains pigments.
Beetroot juice (approx. 200–500 ml daily, pressed from fresh roots) is the best-studied form for utilising the high nitrate content. Several randomised controlled trials demonstrate significant reductions in systolic blood pressure (–3 to –10 mmHg) and improved endurance performance through increased mitochondrial efficiency and reduced muscular O2 demand. Effect is dose-dependent and onset is approx. 2–3 hours. Not a substitute for antihypertensive medication.
Cooked beetroot — steamed, boiled or oven-roasted — is the classic preparation as a side dish, in soups (borscht, labskaus) or salads. Cooking breaks down cell walls and improves bioavailability of betalains, although nitrate and folate content decrease somewhat. Beetroot can be cooked skin-on and peeled afterwards.
Fermented beetroot (kwas burakowy / beet kvass): The root is sliced, covered with water, salt and optionally a little rye sourdough starter, and left to ferment at room temperature for 2–5 days. The slightly sour, deep-red drink is rich in lactic acid bacteria and is traditionally consumed in Eastern Europe as a probiotic and digestive tonic. Betalains are largely preserved during fermentation.
Beetroot leaves (beet tops) are fully edible: young leaves raw in salads, older leaves blanched or steamed like spinach or chard. They contain more iron, calcium and vitamin K than the root itself and are rich in beta-carotene. Often overlooked in the kitchen — but a natural ingredient in traditional Eastern European and Mediterranean cooking.
Beetroot as a natural food colourant: betanin (E 162) is extracted from the root and used as a colourant in yoghurts, juices, sweets and processed foods. In home cooking, fresh beetroot juice or puree dyes pasta dough, bread dough and glazes a deep red to violet. The pigment is heat- and pH-sensitive — it fades above pH 7 and becomes unstable above 80 °C.
Traditionally in folk medicine, beetroot is considered a blood-purifying and liver-strengthening vegetable. Some smaller studies suggest hepatoprotective effects of betalains (antioxidant protection of liver cells), but robust clinical evidence is lacking. The use as a food in folk medicine is documented and corresponds to the folk evidence level.
Beetroot is a normal food and safe for most people. Beeturia (red or pink colouring of urine and stool after consumption) occurs in approx. 10–14 % of the population and is completely harmless — not blood, not a disease. Beetroot contains moderate to high amounts of oxalic acid: people prone to calcium oxalate kidney stones should limit intake and drink adequate water. The high nitrate content is safe for healthy individuals; in very large daily amounts (> 500 ml juice), an interaction with antihypertensive medications is possible.
Safe in pregnancy and lactation as a food in normal amounts. The high folate content is particularly valuable in early pregnancy (neural tube prevention). Very large amounts of beetroot juice are not necessary and should not be encouraged due to nitrate content.
Safe as a food in normal amounts during breastfeeding. Betalains may occasionally tint breast milk slightly pink — harmless.
Suitable as food for children from weaning age. Beeturia may alarm parents — explain that urine discolouration is harmless. Avoid large amounts of beetroot juice in infants under 6 months due to nitrate content (methaemoglobinaemia risk, as with all nitrate-rich vegetables).
Drug interactions
Antihypertensiva (ACE-Hemmer, Betablocker, Calciumantagonisten, Diuretika)
Beetroot juice in large amounts (> 200–500 ml daily) reduces systolic blood pressure by 3–10 mmHg via the nitrate-nitrite-NO pathway. An additive effect is possible when combined with antihypertensive medication — monitor blood pressure. Clinically irrelevant at normal food amounts.
Sildenafil, Tadalafil, Vardenafil (PDE-5-Hemmer)
PDE-5 inhibitors potentiate NO-mediated vasodilation. Large amounts of beetroot juice as an additional NO source could potentiate the blood pressure lowering effect. Clinical data are lacking; no risk at normal food amounts.
Contraindications
- Known hypersensitivity to beet or other Amaranthaceae (rare).
- Calcium oxalate kidney stones (urolithiasis): Beetroot contains oxalic acid — restrict rather than eliminate; drink adequate water.
- Infants under 6 months: avoid beetroot juice due to methaemoglobinaemia risk from nitrate.
Harvested part: root (summer-autumn)
- Time of day:
- Harvesting is possible throughout the day — there is no optimal time window as with medicinal herbs. Best in dry weather so soil falls off more easily.
- Drying:
- In the garden: harvest beetroot when root diameter is 5–10 cm (smaller roots = more tender and sweet). Use a fork to loosen, pull out the root, trim leaves to 3–5 cm (do not cut flush — the skin will break and the beet will 'bleed'). Storage: cool (0–4 °C), dark, slightly moist (cellar, sand or wooden box). Shelf life 3–5 months. In the refrigerator (vegetable drawer) approx. 2–3 weeks. Do NOT store with apples or pears (ethylene accelerates wilting).
- Storage:
- 5 months — Cool (0–4 °C), dark, slightly moist, in sand or wooden box. Do not store near ethylene producers (apples, pears).
- Time of day:
- Harvest young leaves in the early morning or late evening when the plant is less heat-stressed. For salad, take only the tender inner leaves; older outer leaves for blanching or steaming.
- Drying:
- Process beetroot leaves immediately after harvest — do not store (they wilt within a few hours). Leaf stems are edible too. Alternatively blanch and freeze (like spinach). Drying the leaves is uncommon and not worthwhile.
- Storage:
- Process immediately or refrigerate for max. 1–2 days wrapped in a damp cloth.
- Betanin (Betalain-Hauptpigment, E 162)OtherContent: 0,04–0,21 %Root
Betanin is the main red betalain pigment of beetroot, responsible for the intense dark-red colour. It belongs to the betacyanins (nitrogen-containing pigments, structurally distinct from anthocyanins). Antioxidant in vitro; bioavailability varies widely (beeturia = absorption marker). Heat- and pH-sensitive; approved as food colourant E 162.
- Vulgaxanthin I und II (gelbe Betalaine / Betaxanthine)OtherContent: 0,01–0,06 %Root
Yellow betaxanthins masked in the red root by dominant betanin, but forming the main pigments in golden beet varieties. Antioxidant; together with betanin responsible for the overall betalain antioxidant score.
- Anorganisches Nitrat (NO3-)MineralContent: 1500–3000 mg/kg FrischgewichtRoot
Beetroot is among the most nitrate-rich vegetables available. In the body, nitrate is bacterially (oral flora) reduced to nitrite, then enzymatically converted to nitric oxide (NO) — the most important endogenous vasodilator. This nitrate-nitrite-NO pathway explains the blood-pressure-lowering and performance-enhancing effects of beetroot juice documented in clinical trials.
- Folat (Vitamin B9)VitaminContent: 109 µg/100 g (ca. 27 % des Tagesbedarfs)Root
Beetroot is one of the best plant folate sources. Folate is essential for DNA synthesis, cell division and neural tube formation in early pregnancy. Cooking degrades 40–50 % of folate — prefer raw preparation when folate intake is the priority.
- ManganMineralContent: 0,33 mg/100 g (ca. 14 % des Tagesbedarfs)Root
Manganese is a cofactor of numerous enzymes (superoxide dismutase, pyruvate carboxylase) and relevant for bone formation, wound healing and carbohydrate metabolism. Beetroot is among the manganese-rich vegetables.
- KaliumMineralContent: 325 mg/100 g (ca. 7 % des Tagesbedarfs)Root
Potassium supports blood pressure regulation (counterbalancing sodium) and heart and skeletal muscle function. The potassium content complements the blood-pressure-modulating effect of nitrate in beetroot juice.
- Ballaststoffe (Dietary Fibre)PolysaccharideContent: 2,8 g/100 gRoot
Beetroot contains a mix of soluble (pectin) and insoluble fibre. They support bowel motility, prolong satiety and help maintain a healthy gut flora. The leaves (beet tops) contain even more fibre than the root.
- Natürliche Zucker (Saccharose, Glucose, Fructose)OtherContent: 6,8–10 g/100 g GesamtzuckerRoot
Beetroot is naturally sweet — sucrose dominates (closely related to the industrial sugar beet). Glycaemic index approx. 61 (freshly cooked), but glycaemic load only approx. 5 due to high water content. Diabetics can eat beetroot in normal amounts without issue.
- [1]MonographUSDA FoodData Central — Beets, raw (FDC ID: 169145)(accessed: 2026-05-21)
- [2]MonographEFSA Panel on Contaminants in the Food Chain (CONTAM) — Scientific Opinion on Nitrates in Vegetables, EFSA Journal 2008;6(6):689(accessed: 2026-05-21)
- [3]MonographLansley KE et al. — Dietary nitrate supplementation reduces the O2 cost of walking and running: a placebo-controlled study. J Appl Physiol. 2011;110(3):591–600. DOI: 10.1152/japplphysiol.01070.2010(accessed: 2026-05-21)
- [4]MonographPlants For A Future (PFAF) — Beta vulgaris conditiva database entry(accessed: 2026-05-21)
- [8]MonographCliniTox Giftpflanzen — Beta vulgaris L.: giftig + (Institut für Veterinärpharmakologie und -toxikologie, Universität Zürich)(accessed: 2026-08-10)
- [5]WikipediaRote Bete (Wikipedia DE)(accessed: 2026-05-21)
- [6]WikipediaBeetroot (Wikipedia EN)(accessed: 2026-05-21)
- [7]WikidataBeta vulgaris (Wikidata Q14328)(accessed: 2026-05-21)
🤝 Permaculture Partners
In your garden, this plant acts as:
✨ Best symbiotic partners
Source: Helga und Margarete Langerhorst, Mein gesunder Naturgarten (eigene Kuration)