Celery Root (Apium graveolens var. rapaceum)
Celery root (Apium graveolens var. rapaceum) contains phthalides and apigenin that support cardiovascular health through vasodilation and diuretic effects. Clinical studies demonstrate its potential for reducing blood pressure and cholesterol levels in hypertensive patients.
Origin & History
Celery root (Apium graveolens var. rapaceum), also known as celeriac, is the enlarged hypocotyl-root of a cultivated variety of the celery plant from the Mediterranean region, selectively bred for its edible tuberous root. It belongs to the Apiaceae family and is consumed as a whole food in USDA nutrient-dense categories, with research extracts typically using aqueous preparations or juices.
Historical & Cultural Context
Celery (Apium graveolens) has been used in traditional Mediterranean, Ayurvedic, and Chinese medicine for centuries as a diuretic, anti-inflammatory, and antihypertensive agent for conditions including gout, rheumatism, and digestive issues. The root specifically has been valued in folk remedies for its antioxidant and nutritive properties.
Health Benefits
• Blood pressure reduction: Clinical trials with celery seed extract (related to celery root) showed significant reductions in systolic and diastolic blood pressure in hypertensive patients (moderate evidence quality) • Cholesterol management: Randomized trial demonstrated reductions in total cholesterol (16.37 mg/dL), triglycerides (16.22 mg/dL), and LDL (11.84 mg/dL) with celery seed extract (moderate evidence quality) • Antioxidant protection: Preclinical studies show celery root juice enhances glutathione and antioxidant enzymes (SOD, CAT) in liver tissue (preliminary evidence) • Blood sugar support: Clinical trial showed fasting blood sugar reduction from 108.53 to 97.96 mg/dL with celery seed extract in hypertensive patients (moderate evidence quality) • Immune modulation: Laboratory studies demonstrate celery root exosomes suppress inflammatory cytokines (IL-1β, TNF-α) and increase anti-inflammatory IL-10 (preliminary evidence)
How It Works
Celery root's phthalides, particularly 3-n-butylphthalide (3nB), act as calcium channel blockers and promote smooth muscle relaxation in blood vessels. The flavonoid apigenin enhances nitric oxide production, leading to vasodilation and improved endothelial function. Additionally, potassium content supports diuretic effects that help reduce blood volume and pressure.
Scientific Research
Human clinical evidence for celery root specifically is limited, with most data from celery seed extract trials. A randomized, double-blind, placebo-controlled trial (n=28) showed celery seed extract (150 mg/day, 85% NBP) significantly reduced blood pressure and uric acid over 12 weeks (PMC12845499). Another randomized, triple-blind trial (n=51) using 1.34 g/day celery seed extract improved blood pressure and lipid profiles (PMID: 35536382).
Clinical Summary
A randomized controlled trial with celery seed extract showed significant reductions in both systolic (8.9 mmHg) and diastolic (4.2 mmHg) blood pressure over 6 weeks in 79 hypertensive patients. Another study demonstrated 12% reduction in total cholesterol and 15% reduction in LDL cholesterol after 8 weeks of supplementation. However, most research focuses on celery seed rather than celery root specifically, requiring cautious interpretation. Evidence quality is moderate due to limited large-scale, long-term studies.
Nutritional Profile
Celery root (celeriac) per 100g raw: Calories 42 kcal, Carbohydrates 9.2g, Dietary Fiber 1.8g, Sugars 1.6g, Protein 1.5g, Fat 0.3g, Water 88g. Key vitamins: Vitamin K1 (41 mcg, ~34% DV — high bioavailability as phylloquinone), Vitamin C (8 mg, ~9% DV), Vitamin B6 (pyridoxine, 0.165 mg, ~10% DV), Folate (8 mcg, ~2% DV), Vitamin E (0.36 mg). Key minerals: Phosphorus (115 mg, ~9% DV — moderate bioavailability), Potassium (300 mg, ~6% DV), Calcium (43 mg, ~3% DV — absorption partially limited by oxalates), Magnesium (20 mg), Iron (0.7 mg — non-heme, lower bioavailability ~10-15%), Manganese (0.158 mg, ~7% DV), Sodium (100 mg naturally occurring. Bioactive compounds: Phthalides (3-n-butylphthalide, sedanolide) — lipophilic compounds concentrated in root tissue, responsible for characteristic aroma and implicated in blood pressure modulation via smooth muscle relaxation; Apigenin (flavone, ~0.5-2 mg/100g) — antioxidant and anti-inflammatory properties, moderate bioavailability enhanced by fat co-consumption; Luteolin (flavone, trace amounts); Caffeic acid and chlorogenic acid (hydroxycinnamic acids, ~15-30 mg/100g) — antioxidant phenolics, bioavailability ~30-40% from vegetable matrix; Furanocoumarins (bergapten, xanthotoxin) — present in small amounts, photosensitizing potential at high intakes; Polyacetylenes (falcarinol, falcarindiol) — trace levels, lower than carrot. Fiber composition: mix of cellulose, hemicellulose, and pectin supporting gut microbiome. Cooking note: boiling reduces Vitamin C by ~30-50% and leaches water-soluble B vitamins; Vitamin K and phthalides are relatively heat-stable. Oxalate content is moderate (~10-20 mg/100g), mildly reducing calcium and iron bioavailability.
Preparation & Dosage
No standardized human dosing exists specifically for celery root extract. Related celery seed extracts were studied at 150 mg/day (standardized to 85% NBP) for 12 weeks or 1.34 g/day for 4 weeks. Animal studies used celery root juice at 1.5 mg/kg. Consult a healthcare provider before starting any new supplement.
Synergy & Pairings
Hawthorn berry, garlic extract, olive leaf, magnesium, CoQ10
Safety & Interactions
Celery root is generally safe when consumed as food, but supplements may cause allergic reactions in sensitive individuals, particularly those with birch pollen allergies. It may enhance the effects of blood pressure medications, requiring medical supervision for hypertensive patients on medication. Celery root contains natural diuretics that could interact with water pills or potassium-sparing diuretics. Pregnancy and breastfeeding safety data is insufficient, so avoidance is recommended during these periods.