How much celeriac root extract should I take for blood pressure?

The clinical trial demonstrating blood pressure reduction (PMID: 35536382) used a standardized celery seed extract rather than specifying whole celeriac root dosage directly. Commonly studied doses range from 150–300 mg of standardized celery seed extract daily, but individuals on antihypertensive medications should consult a physician before supplementing to avoid additive hypotensive effects.

Is celeriac root the same as celery seed extract?

No, celeriac root (Apium graveolens var. rapaceum) is a specific cultivar harvested for its enlarged hypocotyl, while celery seed extract comes from the seeds of related Apium graveolens varieties. Both share key bioactives like 3-n-butylphthalide (3nB) and apigenin, but concentrations differ significantly, and most clinical evidence for cardiovascular benefit is based on seed extract rather than the root itself.

Can celeriac root lower cholesterol?

Clinical evidence from a trial (n=51, PMID: 35536382) showed celery extract reduced total cholesterol by approximately 16.37 mg/dL and LDL cholesterol meaningfully over the study period. The mechanism is partly attributed to phthalide-mediated inhibition of HMG-CoA reductase activity, similar in concept to statin drugs but far less potent. Celeriac root as a whole food is unlikely to match extract-level effects without standardization.

Is celeriac root safe during pregnancy?

Concentrated celeriac or celery seed extracts are generally not recommended during pregnancy due to the presence of apiol, a furocoumarin compound historically associated with uterotonic activity that may stimulate uterine contractions. Culinary use of celeriac as a vegetable in normal food amounts is considered low risk, but supplemental doses should be avoided until safety in pregnancy is better established through controlled research.

Does celeriac root interact with any medications?

Celeriac extract may enhance the blood-pressure-lowering effects of antihypertensive drugs including ACE inhibitors, calcium channel blockers, and diuretics, risking hypotension. Apigenin has mild antiplatelet properties that could theoretically interact with anticoagulants like warfarin, aspirin, or clopidogrel, increasing bleeding risk. Patients taking thyroid medications, sedatives, or lithium should also seek medical advice, as limited data suggest possible pharmacokinetic interactions via cytochrome P450 enzyme modulation.

What is the difference between celeriac root and celery root supplements?

Celeriac root (Apium graveolens var. rapaceum) is a cultivated variety of celery bred specifically for its large, bulbous root system, while celery root generally refers to the root of common celery plants. Celeriac root supplements typically contain higher concentrations of bioactive compounds like 3-n-butylphthalide (3nB) and polyphenols due to selective breeding for root development. Both derive from the same species but celeriac offers distinct nutritional density and is the preferred source for root-based supplementation.

What clinical evidence supports using celeriac root for cardiovascular health?

A clinical trial (n=51) demonstrated that celery seed extract from this plant species reduced systolic and diastolic blood pressure in hypertensive patients while simultaneously lowering total cholesterol by 16.37 mg/dL, triglycerides by 16.22 mg/dL, and LDL cholesterol by 11.84 mg/dL, while raising HDL by 2.52 mg/dL. This multi-parameter improvement suggests celeriac root addresses multiple cardiovascular risk factors through a single intervention. The evidence base, while promising, relies on a moderate sample size and would benefit from larger confirmatory studies.

Can I obtain the same benefits from eating celeriac root as from taking a supplement?

While whole celeriac root provides fiber, vitamins, and minerals, the concentrations of bioactive compounds like 3-n-butylphthalide and polyphenols in clinical studies typically require standardized extracts or concentrated supplements to achieve therapeutic effects. A typical serving of cooked celeriac root contains approximately 25-35 grams of the root vegetable, which may not deliver sufficient bioactive compound density for the cardiovascular benefits observed in clinical trials. Dietary consumption supports general wellness, but supplemental forms allow for consistent, measurable dosing of active constituents.

Celeriac Root (Apium graveolens var. rapaceum)

Celeriac root (Apium graveolens var. rapaceum) contains active phthalides such as 3-n-butylphthalide (3nB) and apigenin, which relax vascular smooth muscle by blocking calcium channels and modulating prostaglandin synthesis. These bioactives contribute to measurable reductions in blood pressure and lipid levels in clinical settings.

Category: Fruit Evidence: 2/10 Tier: Emerging

Celeriac Root (Apium graveolens var. rapaceum) — Hermetica Encyclopedia

Origin & History

Celeriac root (Apium graveolens var. rapaceum) is the swollen, edible hypocotyl-root of the celery plant, a biennial herb in the Apiaceae family native to the Mediterranean region. It originates from selective breeding of wild celery and is typically harvested as a whole root vegetable, though laboratory methods include aqueous two-phase isolation for exosomes or ultrasound-assisted extraction for biostimulants.

Historical & Cultural Context

Celery (Apium graveolens, including root forms) has been used in European herbalism for centuries to address bronchitis, asthma, psoriasis, fever, and inflammatory conditions. Traditional folk medicine applications emphasized anti-inflammatory, antifungal, and antibacterial properties, though specific historical use of the celeriac root variety is not well documented.

Health Benefits

• Blood pressure support - Clinical trial (n=51) showed celery seed extract reduced systolic and diastolic blood pressure in hypertensive patients (PMID: 35536382)
• Cholesterol management - Same trial demonstrated reductions in total cholesterol (16.37 mg/dL), triglycerides (16.22 mg/dL), and LDL (11.84 mg/dL) with increased HDL (2.52 mg/dL)
• Blood sugar regulation - Fasting blood glucose decreased from 108.53 to 97.96 mg/dL in the hypertensive patient trial
• Immune modulation - In vitro evidence shows celeriac root exosomes suppress T-lymphocyte activation dose-dependently (PMID: 36181394)
• Antioxidant support - Animal studies indicate root extracts increase glutathione and ferric reducing antioxidant power in liver tissue

How It Works

3-n-butylphthalide (3nB) in celeriac acts as a calcium channel antagonist in vascular smooth muscle cells, reducing peripheral vascular resistance and lowering blood pressure. Apigenin inhibits cyclooxygenase (COX) enzymes and modulates prostaglandin E2 synthesis, contributing to anti-inflammatory and vasodilatory effects. Additionally, phthalides suppress HMG-CoA reductase activity, partially explaining observed reductions in LDL cholesterol and total cholesterol in hypertensive patients.

Scientific Research

Limited human clinical trials exist specifically for celeriac root. The primary evidence comes from a randomized, triple-blind, placebo-controlled crossover trial (n=51) testing celery seed extract at 1.34 g/day for 4 weeks, showing cardiovascular and metabolic benefits (PMID: 35536382). Preclinical research includes in vitro studies demonstrating immunomodulatory effects of celeriac root exosomes on T-lymphocytes (PMID: 36181394).

Clinical Summary

A randomized clinical trial (n=51, PMID: 35536382) using celery seed extract in hypertensive patients demonstrated statistically significant reductions in both systolic and diastolic blood pressure alongside decreases in total cholesterol (16.37 mg/dL), triglycerides (16.22 mg/dL), and LDL cholesterol. The evidence base is encouraging but currently limited in scale, with most robust data derived from celery seed extract rather than whole celeriac root specifically. Animal studies support anti-hypertensive mechanisms via phthalide-mediated vasodilation, and preliminary human data suggest cardiovascular benefit at standardized extract doses. Larger, long-term randomized controlled trials isolating celeriac root as a whole food intervention are needed to confirm these findings.

Nutritional Profile

Celeriac root (Apium graveolens var. rapaceum) per 100g raw: Macronutrients - Calories: 42 kcal, Carbohydrates: 9.2g, Dietary Fiber: 1.8g, Protein: 1.5g, Fat: 0.3g, Water: 88g. Key Micronutrients - Vitamin K1 (phylloquinone): 41 mcg (34% DV), Vitamin C: 8 mg (9% DV), Vitamin B6 (pyridoxine): 0.165 mg (10% DV), Vitamin B5 (pantothenic acid): 0.352 mg (7% DV), Phosphorus: 115 mg (9% DV), Potassium: 300 mg (6% DV), Magnesium: 20 mg (5% DV), Calcium: 43 mg (3% DV), Iron: 0.7 mg (4% DV), Manganese: 0.158 mg (7% DV), Zinc: 0.33 mg (3% DV). Bioactive Compounds - Phthalides (3-n-butylphthalide, sedanolide): primary vasorelaxant compounds responsible for blood pressure modulation, concentrated in volatile oil fraction (~0.05-0.1% essential oil by weight); Apigenin and luteolin (flavones): present at approximately 1-3 mg/100g, bioavailability enhanced by fat co-ingestion due to lipophilic nature; Caffeic acid derivatives including chlorogenic acid: ~50-100 mg/100g, moderate bioavailability (~25-35% absorbed); Coumarins (bergapten, psoralen): trace amounts in skin, photosensitizing potential at high intakes; Polyacetylenes (falcarinol, falcarindiol): anti-inflammatory compounds present at low concentrations (~0.5-2 mg/100g); Nitrates: approximately 100-200 mg/100g, converted to nitric oxide via salivary bacteria, contributing to vasodilatory effects. Bioavailability Notes - Vitamin K1 absorption is fat-dependent, estimated 10-20% from raw matrix, improved significantly with dietary fat co-consumption; phthalide compounds are volatile and partially lost during prolonged cooking; fiber is primarily insoluble cellulose and hemicellulose with moderate prebiotic soluble fraction (~0.4g pectin/100g); oxalate content is low (~10-20 mg/100g), posing minimal mineral absorption interference compared to other root vegetables.

Preparation & Dosage

No standardized dosages established specifically for celeriac root. Related celery seed extract was studied at 1.34 g/day (divided into 4 capsules) for 4 weeks. Celeriac root exosomes showed dose-dependent effects in vitro, but human equivalent doses not established. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Hawthorn berry, garlic extract, omega-3 fatty acids, coenzyme Q10, magnesium

Safety & Interactions

Celeriac is generally well tolerated at culinary doses, but concentrated extracts may cause gastrointestinal discomfort, photosensitivity due to furocoumarins, or allergic reactions, particularly in individuals with birch pollen or mugwort allergies due to cross-reactivity. Celeriac can potentiate the effects of antihypertensive medications, increasing the risk of hypotension when combined with drugs such as amlodipine, lisinopril, or hydrochlorothiazide. Due to its potential uterotonic activity linked to apiol content, concentrated celeriac extracts should be avoided during pregnancy. Patients on warfarin or other anticoagulants should exercise caution, as apigenin may have mild antiplatelet properties that could alter bleeding risk.