# Stingray Cartilage (Dasyatis pastinaca)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/stingray-cartilage
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-25
**Evidence Score:** 2 / 10
**Category:** Protein
**Also Known As:** Dasyatis pastinaca, Common stingray cartilage, European stingray cartilage, Marine cartilage extract, Stingray skeletal tissue, Cartilaginous fish extract

## Overview

Stingray cartilage from Dasyatis pastinaca contains bioactive phospholipase A2 enzymes and sulfated glycosaminoglycans that drive its studied biological effects. These compounds demonstrate preliminary [antimicrobial](/ingredients/condition/immune-support) and selective cytotoxic activity in laboratory settings, though no clinical trials in humans have been conducted.

## Health Benefits

• May exhibit [antimicrobial](/ingredients/condition/immune-support) properties against Gram-positive bacteria through phospholipase A2 activity (preliminary lab evidence only, PMID: 22956299)
• Shows selective cytotoxic effects against HL60 leukemia cells in laboratory studies while sparing healthy cells (in vitro evidence only, PMID: 29104260)
• Contains chitinase enzyme with dose-dependent activity (50-200 nmol/mL·h) that may contribute to antimicrobial effects (laboratory evidence only)
• Demonstrated no cytotoxicity to healthy lymphocytes or mesenchymal stem cells in cell culture studies (preliminary safety data)
• Related stingray-derived products (liver oil) showed wound healing in animal models, though not specific to cartilage (animal evidence only)

## Mechanism of Action

Phospholipase A2 (PLA2) enzymes isolated from Dasyatis pastinaca cartilage hydrolyze phospholipid membranes of bacterial cell walls, disrupting membrane integrity and selectively targeting Gram-positive organisms due to their exposed peptidoglycan layers. Sulfated glycosaminoglycans within the cartilage matrix may interact with cell surface proteoglycans and inhibit pro-[inflammatory](/ingredients/condition/inflammation) signaling cascades, including NF-κB pathway modulation. The cytotoxic activity observed against HL60 leukemia cells is hypothesized to involve apoptosis induction, potentially through [mitochondrial](/ingredients/condition/energy) pathway activation, though the precise molecular targets remain uncharacterized in peer-reviewed literature.

## Clinical Summary

All current evidence for stingray cartilage is limited to in vitro laboratory studies, with no randomized controlled trials or human clinical data published to date. A study indexed under PMID 22956299 demonstrated [antimicrobial](/ingredients/condition/immune-support) activity of PLA2 fractions against Gram-positive bacterial strains under controlled laboratory conditions. Separate in vitro research documented selective cytotoxic effects against HL60 human promyelocytic leukemia cells, with preliminary data suggesting relative sparing of non-cancerous cell lines, though effect sizes and concentration thresholds have not been validated in animal or human models. The overall evidence base is nascent, and any therapeutic extrapolation to human health outcomes would be premature and unsupported.

## Nutritional Profile

Stingray cartilage (Dasyatis pastinaca) is a connective tissue matrix composed predominantly of protein (collagen-rich, estimated 50-70% dry weight), glycosaminoglycans (GAGs), and mineralized hydroxyapatite. Key macronutrient and bioactive compound details: **Proteins & Enzymes:** Primarily Type II collagen and collagen-derived peptides (hydroxyproline content ~8-12% of total amino acids, indicative of high collagen proportion); contains phospholipase A2 (PLA2) with demonstrated [antimicrobial](/ingredients/condition/immune-support) catalytic activity (PMID: 22956299); chitinase enzyme activity documented at 50-200 nmol/mL·h in dose-dependent manner; acid-soluble collagen (ASC) and pepsin-soluble collagen (PSC) extractable fractions are rich in glycine (~33%), proline (~12%), and hydroxyproline (~10%). **Glycosaminoglycans (GAGs):** Chondroitin sulfate (estimated 5-15% dry weight of cartilage matrix, typical of elasmobranch cartilage); smaller amounts of hyaluronic acid and keratan sulfate likely present. **Minerals:** Calcium (from hydroxyapatite, estimated 5-15% dry weight depending on calcification degree); phosphorus (Ca:P ratio approximately 1.6-2.1:1); trace amounts of magnesium, zinc, and manganese associated with cartilage matrix metalloproteinases. **Lipid fraction:** Minor component (<5% dry weight), but notable for bioactive phospholipids serving as PLA2 substrates; omega-3 polyunsaturated fatty acids (EPA/DHA) may be present in trace amounts within membrane phospholipids. **Bioactive peptides:** Upon enzymatic hydrolysis, cartilage yields low-molecular-weight peptides (typically 1-10 kDa) with reported [antioxidant](/ingredients/condition/antioxidant) (DPPH/ABTS radical scavenging) and ACE-inhibitory potential, though specific IC50 values for D. pastinaca cartilage hydrolysates require further characterization. **Vitamins:** No significant vitamin content documented; trace amounts of fat-soluble vitamins (A, D, E) may be present in residual tissue but are not a meaningful dietary source. **Bioavailability notes:** Raw cartilage matrix has low digestibility due to cross-linked collagen and calcified structure; enzymatic hydrolysis (pepsin, trypsin, or alkaline protease treatment) substantially improves peptide bioavailability and bioactivity. Chondroitin sulfate oral bioavailability is generally estimated at 10-20% in humans (extrapolated from mammalian CS studies). Collagen peptides (particularly di- and tripeptides containing hydroxyproline) show relatively high oral absorption (~90% for low-MW hydrolysates). Mineral bioavailability from hydroxyapatite form is moderate compared to ionic calcium supplements. Overall, stingray cartilage is not consumed as a conventional food but is investigated as a source of bioactive protein hydrolysates, GAGs, and enzymes with potential nutraceutical applications.

## Dosage & Preparation

No clinically studied dosage ranges exist for stingray cartilage in humans. Laboratory studies used enzyme concentrations of 2.5-10 μg/μL, but these cannot be translated to human supplement recommendations. No standardized extract formulations or established dosing protocols have been identified. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

No formal human safety studies, toxicology profiles, or standardized dosing guidelines exist for stingray cartilage supplements, making risk assessment highly uncertain. Individuals with seafood or shellfish allergies may face cross-reactive hypersensitivity risks due to shared marine glycoprotein antigens. Potential interactions with anticoagulant medications such as warfarin are theoretically plausible given the sulfated glycosaminoglycan content, which structurally resembles heparin, though no interaction studies have been performed. Stingray cartilage supplementation is not recommended during pregnancy, breastfeeding, or in immunocompromised individuals due to the complete absence of safety data in these populations.

## Scientific Research

No human clinical trials exist for stingray cartilage supplements. Available research consists exclusively of in vitro studies including [antimicrobial](/ingredients/condition/immune-support) and anti-proliferative effects in cell cultures (PMID: 29104260) and isolation of antibacterial phospholipase A2 enzyme (PMID: 22956299). All evidence remains at the preliminary laboratory stage with no human efficacy or safety data.

## Historical & Cultural Context

No information regarding traditional medicine use of stingray cartilage is provided in the available research literature. The search results focus exclusively on modern biomedical research rather than historical or ethnobotanical applications.

## Synergistic Combinations

Shark cartilage, glucosamine, chondroitin, marine collagen, astaxanthin

## Frequently Asked Questions

### What is stingray cartilage used for in supplements?

Stingray cartilage from Dasyatis pastinaca is preliminarily investigated for antimicrobial and anticancer properties based solely on laboratory studies. Its phospholipase A2 enzymes and sulfated glycosaminoglycans are the primary bioactive fractions of interest, but no approved therapeutic or supplement use has been established in humans.

### Does stingray cartilage kill cancer cells?

In vitro studies have shown that extracts from Dasyatis pastinaca cartilage exhibit selective cytotoxic effects against HL60 promyelocytic leukemia cells while relatively sparing healthy cells in laboratory conditions. These findings have not been replicated in animal models or human trials, so no conclusion about anticancer efficacy in humans can be drawn from the existing data.

### What bacteria does stingray cartilage work against?

Laboratory evidence indexed under PMID 22956299 indicates that phospholipase A2 fractions from Dasyatis pastinaca cartilage show antimicrobial activity primarily against Gram-positive bacteria, which are more susceptible due to their exposed peptidoglycan cell wall structure. Specific bacterial strains tested and minimum inhibitory concentrations were reported in the source study, but this activity has not been confirmed in clinical infection models.

### Is stingray cartilage safe to take as a supplement?

There is currently no published human safety data, established tolerable dose, or regulatory approval for stingray cartilage as a dietary supplement. Its sulfated glycosaminoglycan content raises theoretical concerns about interaction with blood-thinning medications like warfarin, and individuals with marine animal allergies should exercise particular caution. Consulting a healthcare provider before use is strongly advised.

### How is stingray cartilage different from shark cartilage supplements?

Both stingray and shark cartilage contain sulfated glycosaminoglycans and collagen-type proteins, but Dasyatis pastinaca cartilage is specifically noted for its phospholipase A2 enzyme activity, which is the primary bioactive mechanism studied and is not the focus of shark cartilage research. Shark cartilage has a longer supplement market history and marginally more clinical investigation, including failed cancer trials, while stingray cartilage research remains at the early in vitro stage with a distinct enzymatic profile under study.

### What does clinical research show about stingray cartilage's effectiveness?

Current evidence for stingray cartilage is primarily limited to laboratory (in vitro) studies, with no large-scale human clinical trials published to date. While preliminary research suggests potential antimicrobial and selective cytotoxic activity against certain cancer cell lines, these findings cannot yet be reliably translated to human health outcomes. More rigorous clinical trials would be needed to establish whether benefits observed in test tubes actually occur in living subjects.

### Who should avoid stingray cartilage supplements?

Individuals with shellfish or marine allergies should exercise caution, as cross-reactivity is possible with cartilage-derived supplements. Pregnant and nursing women should consult a healthcare provider before use, as safety data in these populations is limited. Those taking anticoagulant medications or with bleeding disorders should seek medical advice, as some cartilage supplements may have mild anticoagulant effects.

### How does the chitinase enzyme in stingray cartilage affect supplement potency?

Stingray cartilage contains chitinase enzyme with dose-dependent activity ranging from 50–200 nmol/mL·h, which may contribute to its biochemical profile, though its functional relevance to human health remains unclear. The stability and bioavailability of this enzyme through the digestive system has not been thoroughly studied. Processing methods and storage conditions may affect chitinase activity levels, potentially influencing batch-to-batch consistency of supplements.

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