Toxic Plant Metabolites, Cyanogenic Glycosides, Poisoning Mechanisms, Health Risks, and Analytical Method Development for Detecting Toxicants in Food

Authors

  • Saurabh Dilip Bhandare *

    Foxabell—Laboratorium Investigativum, Laboratorium Scientiae et Studiorum Investigativorum, Nashik 422101, India

    Bramha Valley Group of Colleges, Nashik Gramin Shikshan Prasarak Mandal’s College of Pharmacy, Nashik 422213, India

  • Sarika Shivaji Malode

    Foxabell—Laboratorium Investigativum, Laboratorium Scientiae et Studiorum Investigativorum, Nashik 422101, India

    Pharmaceutical Quality Assurance, K.K. Wagh College of Pharmacy (KKWCOP), Nashik 422003, India

DOI:

https://doi.org/10.55121/fds.v3i1.1019
Received: 11 December 2025 | Revised: 28 December 2025 | Accepted: 5 January 2026 | Published Online: 12 January 2026

Abstract

This study presents a novel robust titrimetric analysis method for detection and quantification of cyanide in food samples artificially spiked with cyanogenic compounds derived from bamboo and cassava species. The titration approach demonstrated a strong linear correlation between cyanide concentration and the volume of titrant required for complete neutralisation. Cyanogenic glycosides are naturally occurring plant toxins that can release hydrogen cyanide (HCN) upon enzymatic hydrolysis, posing a significant risk to human health. These compounds are found in various plants, including bitter almonds, cassava, and wild cherries, and play a defensive role against herbivorous. However, their presence in food sources raises concerns about accidental poisoning, neurotoxic syndromes like tropical ataxic neuropathy and Konzo disease, and potential long-term health effects. Food safety concerns, detoxification methods, and strategies to minimise cyanogenic risks through proper food processing and dietary awareness. Understanding these toxic secondary metabolites is crucial for ensuring food safety and preventing health hazards associated with plant-based diets and traditional herbal medicine practices. Results showed that increasing cyanide levels directly corresponded to higher titrant volumes, with 2 ppm cyanide requiring 22 mL of titrant and 25 ppm requiring 550 mL, confirming the method’s reliability. Comparison with standard cyanide detection protocols validated the accuracy and consistency of the titrimetric technique. Reproducibility of results across different concentrations and sample types highlights the robustness and precision of this method, making it suitable for cyanide monitoring in various food matrices. This approach offers a practical, robust novel analytical-technique for routine food safety analysis, particularly in toxicological analysis.

Keywords:

Accidental Poisoning, Chemical Warfare Agents, Food Contamination and Food Processing Safety, Herbal Medicine Toxicity, Hydrogen Cyanide (HCN), Cyanogenic Glycosides, Neurotoxic Syndromes–Tropical Ataxic Neuropathy

References

[1] Bone, K., Mills, S., 2013. Principles of Herbal Pharmacology. In: Bone, K., Mills, S. (Eds.). Principles and Practice of Phytotherapy: Modern Herbal Medicine, 2nd ed. Churchill Livingstone: London, UK. pp. 17–82. DOI: https://doi.org/10.1016/b978-0-443-06992-5.00002-5

[2] Hunter, I., Yang, F., 2020. Cyanide in Bamboo Shoots. Available from: https://www.inbar.int/wp-content/uploads/2020/05/1489541869.pdf (cited 4 April 2025).

[3] Sang-A-Gad, P., Guharat, S., Wananukul, W., 2011. A Mass Cyanide Poisoning from Pickling Bamboo Shoots. Clinical Toxicology. 49(9), 834–839. DOI: https://doi.org/10.3109/15563650.2011.618456

[4] Rumbeiha, W.K., Oehme, F.W., 2005. Veterinary Toxicology. In: Wexler, P. (Ed.). Encyclopedia of Toxicology, 2nd ed. Academic Press: New York, NY, USA. pp. 420–434. DOI: https://doi.org/10.1016/b0-12-369400-0/01004-8

[5] Bhandare, S.D., Malode, S.S., 2024. Robust Chemical Testing for Food Safety: Assessing and Identifying Dye Adulterants in Blueberry Juice: A Comprehensive Case Study with Statistical Measures and Correlation Analysis. Food and Drug Safety. 1(1), 28–43. DOI: https://doi.org/10.55121/fds.v1i1.145

[6] Bhandare, S.D., 2025. Prevalence and Impact of Dye Adulteration in Toffee Consumption: A Case Study on Mildly Acute or Acute Toxicity Affecting the Population in Misbranded Toffee and Candy Consumption; an Occupational Health Study Report and Branding Strategies in Marketing New Products. Journal of Toxicological Studies. 3(1), 1570. DOI: https://doi.org/10.59400/jts1570

[7] Teran, C.G., Sura, S., Cabandugama, P., et al., 2011. Silver Nitrate Ingestion: Report of a Case with an Uneventful Course and Review of the Literature. Clinical Practice. 1(3), e43. DOI: https://doi.org/10.4081/cp.2011.e43

[8] Walker, M., Cochrane, C.A., Bowler, P., et al., 2006. Silver Deposition and Tissue Staining Associated with Wound Dressings Containing Silver. Ostomy Wound Management. 52(1), 42–50.

[9] Cereda, M.P., Mattos, M.C.Y., 1996. Linamarin: The Toxic Compound of Cassava. Journal of Venomous Animals and Toxins. 2(1), 6–12. DOI: https://doi.org/10.1590/s0104-79301996000100002

[10] Dunn, P.M., 2000. Dr Carl Credé (1819–1892) and the Prevention of Ophthalmia Neonatorum. Archives of Disease in Childhood-Fetal and Neonatal Edition. 83, F158–F159. DOI: https://doi.org/10.1136/fn.83.2.F158

[11] Chow, N., Fain, K., Truitt, J., et al., 2022. Systemic Argyria with Severe Anemia (Hemoglobin 2.4 g/L). Baylor University Medical Center Proceedings. 35(3), 382–384. DOI: https://doi.org/10.1080/08998280.2021.2022369

[12] Steck, M.B., Murray, B.P., 2025. Silver Toxicity. In StatPearls [Internet]. StatPearls Publishing: Treasure Island, FL, USA

[13] Mota, L., Dinis-Oliveira, R.J., 2021. Clinical and Forensic Aspects of the Different Subtypes of Argyria. Journal of Clinical Medicine. 10(10), 2086.

[14] Ohbo, Y., Fukuzako, H., Takeuchi, K., et al., 1996. Argyria and Convulsive Seizures Caused by Ingestion of Silver in a Patient with Schizophrenia. Psychiatry and Clinical Neurosciences. 50(2), 89–90.

[15] Crews, C., Clarke, D., 2014. Natural Toxicants: Naturally Occurring Toxins of Plant Origin. Encyclopedia of Food Safety. 2, 261–268. DOI: https://doi.org/10.1016/b978-0-12-378612-8.00173-6

[16] Larrea, M.I.S.A., Larrea, M.D.S.A., Olivos-Ore, L.A., 2022. Plants, Poisonous (Animals). In: Wexler, P. (Ed.). Encyclopedia of Toxicology, 4th ed. Academic Press: New York, NY, USA. pp. 685–703. DOI: https://doi.org/10.1016/b978-0-12-824315-2.00143-3

[17] Ksenofontova, A.A., 2024. Poisonous Plants and Phytotoxicoses in Horses (Review). Agricultural Biology. 59(1), 54–72. DOI: https://doi.org/10.15389/agrobiology.2024.1.54eng

[18] Zagrobelny, M., Bak, S., Møller, B.L., 2008. Cyanogenesis in Plants and Arthropods. Phytochemistry. 69(7), 1457–1468. DOI: https://doi.org/10.1016/j.phytochem.2008.02.019

[19] Conn, E.E., 2007. Our Work with Cyanogenic Plants. Annual Review of Plant Biology. 59(1), 1–19. DOI: https://doi.org/10.1146/annurev.arplant.59.032607.092924

[20] Conn, E.E., 1980. Cyanogenic Compounds. Annual Review of Plant Physiology. 31(1), 433–451. DOI: https://doi.org/10.1146/annurev.pp.31.060180.002245

[21] Stefanopoulos, P., Aloizos, S., Tsironi, M., 2022. Clinical Symptoms of Chemical Warfare Agents Toxicity Including Mustards, Halogenated Oximes, Arsenicals, and Toxins Poisoning. In: Das, S., Thomas, S., Das, P.P. (Eds.). Sensing of Deadly Toxic Chemical Warfare Agents, Nerve Agent Simulants, and Their Toxicological Aspects. Elsevier: Amsterdam, The Netherlands. pp. 431–487. DOI: https://doi.org/10.1016/b978-0-323-90553-4.00029-9

[22] Vetter, J., 2000. Plant Cyanogenic Glycosides. Toxicon. 38(1), 11–36. DOI: https://doi.org/10.1016/s0041-0101(99)00128-2

[23] Aikman, K., Bergman, D., Ebinger, J., et al., 1996. Variation of Cyanogenesis in Some Plant Species of the Midwestern United States. Biochemical Systematics and Ecology. 24(7–8), 637–645. DOI: https://doi.org/10.1016/s0305-1978(96)00069-5

[24] Gleadow, R.M., Møller, B.L., 2014. Cyanogenic Glycosides: Synthesis, Physiology, and Phenotypic Plasticity. Annual Review of Plant Biology. 65(1), 155–185. DOI: https://doi.org/10.1146/annurev-arplant-050213-040027

[25] Thakur, K., Rajani, C.S., Tomar, S.K., et al., 2016. Fermented Bamboo Shoots: A Riche Niche for Beneficial Microbes. Journal of Bacteriology & Mycology: Open Access. 2(4), 00030.

[26] Singhal, P., 2024. Bamboo Leaves: An Emerging Multi-Functional Food. Food and Drug Safety. 1(1), 1–9. DOI: https://doi.org/10.55121/fds.v1i1.134

[27] Tsukioka, J., Ohki, Y., Nakao, M., et al., 2023. Quantitative Analysis of Taxiphyllin, a Cyanogenic Glycoside, in the Leaves of Hydrangea macrophylla var. thunbergii. Journal of Natural Medicines. 77(4), 978–985. DOI: https://doi.org/10.1007/s11418-023-01733-7

[28] Schwarzmaier, U., 1977. Cyanogenesis of Dendrocalamus: Taxiphyllin. Phytochemistry. 16(10), 1599–1600. DOI: https://doi.org/10.1016/0031-9422(77)84032-6

[29] Naveena, K., Chinniah, C., Shanthi, M., 2021. Cyanogenic Glycosides and Plant-Herbivore Interactions. Journal of Entomology and Zoology Studies. 9(1), 1345–1350.

[30] Fernandes, Q., Billa, N., 2024. Amygdalin in Antineoplastic Medicine and the Relevance of Nanotechnology. Biomedicine & Pharmacotherapy. 182, 117772. DOI: https://doi.org/10.1016/j.biopha.2024.117772

[31] Paul, L., Shadrack, D.M., Mudogo, C.N., et al., 2021. Structural Characterization of Cassava Linamarase-Linamarin Enzyme Complex: An Integrated Computational Approach. Journal of Biomolecular Structure and Dynamics. 40(19), 9270–9278. DOI: https://doi.org/10.1080/07391102.2021.1925156

[32] Wang, B., Xiong, W., Guo, Y., 2024. Dhurrin in Sorghum: Biosynthesis, Regulation, Biological Function and Challenges for Animal Production. Plants. 13(16), 2291. DOI: https://doi.org/10.3390/plants13162291

[33] National Library of Medicine: National Center for Biotechnology Information, 2025. Compound: Taxiphyllin. Available from: https://pubchem.ncbi.nlm.nih.gov/compound/Taxiphyllin (cited 4 April 2025).

[34] Ritmejerytė, E., Boughton, B.A., Bayly, M.J., et al., 2023. Diverse Organ-Specific Localisation of a Chemical Defence, Cyanogenic Glycosides, in Flowers of Eleven Species of Proteaceae. PLoS ONE. 18(4), e0285007. DOI: https://doi.org/10.1371/journal.pone.0285007

[35] Walcott Garden, 2024. Our Plants: Hakeas. Available from: https://www.walcottgarden.com/blog/hakeas (cited 5 April 2025).

[36] Kell, 2017. PlantFiles Pictures: Hakea Species (Hakea grammatophylla). Available from: https://davesgarden.com/guides/pf/showimage/416036 (cited 5 April 2025).

[37] Long, S.P., De Souza, A.P., Massenburg, L., 2017. Research Shows How to Grow More Cassava, One of the World's Key Food Crops. Available from: https://lab.igb.illinois.edu/long/news/research-shows-how-grow-more-cassava-one-worlds-key-food-crops (cited 4 April 2025).

[38] Freepik, 2024. Premium Photo | Green of Cassava Fruit on Branch Plant Tree and Leaf in the Cassava Field Agriculture Plantation. Available from: https://www.freepik.com/premium-photo/green-cassava-fruit-branch-plant-tree-leaf-cassava-field-agriculture-plantation_289397101.htm (cited 4 April 2025).

[39] Fukushima, A.R., Nicoletti, M.A., Rodrigues, A.J., et al., 2016. Cassava Flour: Quantification of Cyanide Content. Food and Nutrition Sciences. 7(7), 592–599. DOI: https://doi.org/10.4236/fns.2016.77060

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