# Devil's Claw (Harpagophytum zeyheri)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/devil-s-claw
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 8 / 10
**Category:** African
**Also Known As:** Harpagophytum procumbens, Harpagophytum zeyheri, Grapple plant, Wood spider, Windhoek root, Teufelskralle, Khanna

## Overview

Devil's claw (Harpagophytum zeyheri) is a medicinal plant containing harpagoside as its primary bioactive compound. It reduces [inflammation](/ingredients/condition/inflammation) and pain by inhibiting inflammatory mediators like TNF-alpha and cyclooxygenase enzymes.

## Health Benefits

• Pain reduction in osteoarthritis - moderate evidence from 4 double-blind RCTs showing significant pain relief, though studies had methodological limitations
• Improved mobility in musculoskeletal conditions - supported by multiple trials showing enhanced motility over 4-12 weeks
• Anti-inflammatory effects - demonstrated through COX-2 pathway inhibition and reduced [pro-inflammatory cytokine](/ingredients/condition/inflammation)s in animal models
• Neuropathic pain relief - preliminary evidence from rat studies showing increased mechanical withdrawal threshold at 300 mg/kg
• Potential [antimicrobial](/ingredients/condition/immune-support) action - shown against Candida species linked to gut inflammation reduction in animal studies

## Mechanism of Action

Devil's claw's harpagoside and other iridoid glycosides inhibit [pro-inflammatory cytokine](/ingredients/condition/inflammation)s including TNF-alpha, interleukin-1β, and interleukin-6. The compounds suppress cyclooxygenase-2 (COX-2) and lipoxygenase pathways, reducing prostaglandin and leukotriene production. This dual anti-inflammatory action decreases joint inflammation and associated pain signaling.

## Clinical Summary

Four double-blind RCTs demonstrate moderate evidence for osteoarthritis pain reduction, with participants experiencing 20-25% pain score improvements over 8-12 weeks. Multiple trials show enhanced mobility in musculoskeletal conditions using standardized extracts containing 50-100mg harpagoside daily. Study limitations include small sample sizes (30-89 participants) and variable extraction methods. Evidence quality is considered moderate due to methodological constraints but consistently positive outcomes.

## Nutritional Profile

Devil's Claw (Harpagophytum zeyheri) is not consumed as a food source for macronutrient value but is valued for its bioactive phytochemical profile. **Primary bioactive compounds:** • Iridoid glycosides — the principal active class, including harpagoside (typically 0.5–3.0% in dried tuber, though H. zeyheri generally contains lower concentrations than H. procumbens, often 0.5–1.2%), harpagide (~0.1–0.5%), and procumbide (~0.1–0.3%). Harpagoside is considered the primary marker compound responsible for [anti-inflammatory](/ingredients/condition/inflammation) and analgesic activity. • 8-p-coumaroylharpagide — an iridoid ester present in notable quantities, sometimes used as a distinguishing marker for H. zeyheri versus H. procumbens. • Acteoside (verbascoside) — a phenylpropanoid glycoside with demonstrated [antioxidant activity](/ingredients/condition/antioxidant), present at approximately 0.2–1.0% of dried root weight. • Free phenolic acids — including caffeic acid, cinnamic acid, and chlorogenic acid, contributing to overall antioxidant capacity. **Secondary metabolites:** • Flavonoids — including luteolin and kaempferol glycosides in trace to moderate amounts. • Phytosterols — including beta-sitosterol (~0.01–0.05%), with modest anti-inflammatory contributions. • Triterpenes — including oleanolic acid and ursolic acid in minor concentrations. • Quinone compounds — including harpagoquinone, present in small amounts. **Sugars and polysaccharides:** • Stachyose and other oligosaccharides (~40–50% of dried tuber by weight), along with water-soluble polysaccharides that make up a substantial portion of the secondary tuber mass. **Mineral content (approximate per 100 g dried tuber):** • Calcium: 500–800 mg • Iron: 5–12 mg • Magnesium: 150–300 mg • Potassium: 600–1000 mg • Phosphorus: 100–200 mg • Trace minerals: manganese, zinc, copper, and selenium in small quantities. **Fiber:** Crude fiber content approximately 8–15% of dried tuber weight. **Protein:** Low, approximately 4–7% of dried tuber weight. **Fat:** Very low, approximately 0.5–1.5%. **Bioavailability notes:** Harpagoside has moderate oral bioavailability but undergoes significant first-pass hepatic [metabolism](/ingredients/condition/weight-management) and partial hydrolysis in the gastrointestinal tract to release harpagogenin (the aglycone), which retains biological activity. Standardized extracts (typically dosed to deliver 50–100 mg harpagoside daily in clinical studies) show measurable plasma levels within 1–2 hours. The aqueous and ethanolic extraction methods significantly affect iridoid glycoside yield; ethanol-water (30–60%) mixtures generally optimize harpagoside recovery. H. zeyheri is often noted to have a somewhat different iridoid glycoside ratio compared to H. procumbens, with relatively higher 8-p-coumaroylharpagide and lower harpagoside, which may influence comparative clinical efficacy.

## Dosage & Preparation

Dry extracts standardized to 50-100 mg harpagoside/day (effective dose in OA trials). Powdered root: 2400-6645 mg/day. Liquid extracts (1:1): 480-1030 mg/day. Treatment duration in studies: 4-12 weeks. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Devil's claw is generally well-tolerated with mild gastrointestinal upset reported in 5-10% of users. It may enhance warfarin's anticoagulant effects and should be avoided with blood-thinning medications. Contraindicated in individuals with peptic ulcers, gallstones, or cardiac arrhythmias. Safety during pregnancy and lactation is unknown, requiring avoidance in these populations.

## Scientific Research

A 2007 systematic review identified 14 trials on Devil's Claw for osteoarthritis, with higher-quality RCTs showing pain reduction but suffering from methodological flaws including inadequate blinding and small sample sizes (often <100 participants). A 2002 analysis found that extracts containing >50 mg/day harpagoside alleviated OA pain across trials with 40-90 participants over 4-8 weeks, while a 12-week study (n=75) using Teltonal extract showed significant pain relief for hip/knee osteoarthritis.

## Historical & Cultural Context

Devil's Claw has been used for centuries in African traditional medicine systems, particularly in Namibia and Botswana, to treat pain, arthritis, digestive issues, and rheumatic conditions. Traditional preparations involve making teas or decoctions from the dried roots.

## Synergistic Combinations

Turmeric, Boswellia, Glucosamine, Chondroitin, MSM

## Frequently Asked Questions

### Does devil's claw help with osteoarthritis knee and hip pain?

Yes, there is moderate evidence supporting devil's claw for osteoarthritis of the knee and hip. A 12-week RCT using a standardized Teltonal extract (n=75) demonstrated significant pain relief in hip and knee OA, and a 2002 analysis confirmed that extracts delivering over 50 mg harpagoside per day consistently reduced pain across multiple trials. The mechanism involves inhibition of COX-2 enzymes and pro-inflammatory cytokines like TNF-alpha and interleukin-1β. However, many supporting studies had small sample sizes and methodological limitations, so results should be interpreted cautiously.

### What is the difference between Harpagophytum procumbens and Harpagophytum zeyheri?

Both Harpagophytum procumbens and Harpagophytum zeyheri are African plants collectively called devil's claw, sharing harpagoside as their primary bioactive iridoid glycoside. Harpagophytum zeyheri is considered the secondary species and is often used interchangeably with H. procumbens in commercial supplements, as both contain similar anti-inflammatory compounds. Most clinical trials have used H. procumbens, so direct comparative efficacy data on H. zeyheri alone is limited. When choosing a supplement, look for standardized harpagoside content rather than relying solely on species labeling.

### Can I take devil's claw instead of NSAIDs for joint pain?

Devil's claw shares a similar mechanism with NSAIDs, inhibiting COX-2 enzymes and reducing prostaglandin production, but it is not a proven replacement for prescription or over-the-counter NSAIDs. Clinical evidence supports it as a complementary or adjunctive option for mild-to-moderate osteoarthritis pain. It may suit those seeking to reduce NSAID reliance due to gastrointestinal side effects. However, you should not discontinue prescribed medications without consulting your healthcare provider, as the evidence base for devil's claw, while promising, comes from trials with methodological limitations.

### Does devil's claw help with lower back pain?

Devil's claw has been studied for non-specific lower back pain, with some trials showing meaningful pain reduction. Its anti-inflammatory action through COX-2 inhibition and suppression of interleukin-6 and TNF-alpha may reduce musculoskeletal inflammation contributing to back pain. Typical effective doses in musculoskeletal studies ranged from 2400 to 6645 mg per day of powdered root, or dry extracts standardized to 50–100 mg harpagoside daily. A treatment period of at least 4 weeks appears necessary before noticeable benefits emerge, based on available clinical data.

### What are the side effects of devil's claw?

Devil's claw is generally well tolerated in clinical trials at recommended doses. The most commonly reported side effects are gastrointestinal, including nausea, diarrhea, and stomach discomfort, particularly with higher powdered root doses up to 6645 mg per day. Because it inhibits COX-2 and may reduce stomach-protective prostaglandins, individuals with peptic ulcers or gastritis should use it with caution. It may also interact with anticoagulants and blood-thinning medications due to potential effects on platelet aggregation. Always consult a healthcare provider before starting supplementation.

### Is devil's claw effective for neuropathic pain?

Evidence for devil's claw in neuropathic pain is currently preliminary and limited to animal studies. Rat models have shown increased mechanical withdrawal thresholds at doses of 300 mg/kg, suggesting a potential pain-modulating effect beyond simple inflammation reduction. The mechanism may involve suppression of pro-inflammatory cytokines like TNF-alpha that sensitize nociceptors in neuropathic conditions. Human clinical trials specifically targeting neuropathic pain are lacking, so it is too early to recommend devil's claw as an evidence-based treatment for neuropathic pain in humans.

### Can devil's claw improve mobility and flexibility in joint conditions?

Yes, multiple clinical trials lasting 4 to 12 weeks have reported improved motility and joint mobility alongside pain reduction in participants with musculoskeletal conditions. This is consistent with its dual anti-inflammatory action, where inhibiting both COX-2 and lipoxygenase pathways reduces joint swelling and stiffness that restrict movement. Standardized dry extracts delivering at least 50 mg harpagoside daily were the doses associated with improved mobility outcomes in reviewed RCTs. Functional improvements in range of motion tend to develop gradually over several weeks of consistent supplementation.

### Can devil's claw help with gut inflammation or Candida-related digestive issues?

Devil's claw has shown preliminary antimicrobial activity against Candida species in animal studies, with associated reductions in gut inflammation markers. This action may be linked to its broader suppression of pro-inflammatory cytokines such as interleukin-1β and TNF-alpha within the gastrointestinal environment. However, this evidence is confined to animal models, and no human clinical trials have specifically evaluated devil's claw for Candida-related gut inflammation or digestive issues. It should not currently be recommended as a primary treatment for gut conditions based on available evidence.

### How much harpagoside should I take for arthritis pain?

Clinical studies used 50-100mg of harpagoside daily, typically found in 1,500-3,000mg of standardized devil's claw extract. Most effective results occurred after 8-12 weeks of consistent use.

### Can devil's claw interact with blood pressure medications?

Devil's claw may enhance anticoagulant effects of warfarin and potentially interact with cardiac medications. Consult your physician before combining with blood pressure or heart medications.

### How long does devil's claw take to work for joint pain?

Clinical trials show initial pain relief within 2-4 weeks, with maximum benefits occurring after 8-12 weeks of daily use. Consistent supplementation is required for sustained effects.

### Is devil's claw safe for long-term use?

Studies up to 12 weeks show good safety profiles with minimal side effects. Long-term safety data is limited, so periodic breaks and medical monitoring are recommended for extended use.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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