Glyphosate in Tea

Introduction
Tea is the second most consumed beverage globally, revered for its health benefits and heritage. However, the growing concern over glyphosate residues in tea has posed a serious challenge to producers, exporters, regulators, and retailers. As global scrutiny increases, ensuring residue compliance has become essential not just for public health, but also for industry reputation and export access.
What Is Glyphosate?
Glyphosate (N-(phosphonomethyl)glycine) is a non-selective, systemic herbicide widely used in agriculture to control broadleaf weeds and grasses. It inhibits the EPSP synthase enzyme in the shikimate pathway essential for plant growth but absent in animals and humans. Its broad usage has led to widespread detection in food chains, especially crops like tea that are harvested frequently and processed with minimal washing.
Why Is Glyphosate Used in Tea Cultivation?
Tea plantations are located in tropical, high-humidity regions where weeds flourish. Manual weeding is labor-intensive, and terrain often prevents mechanization. Glyphosate is:
- Cost-effective
- Quick-acting
- Compatible with large-scale plantation operations
However, its misuse or improper timing can lead to residues persisting on harvested tea leaves—raising food safety concerns and regulatory flags.
How Glyphosate Enters Tea: Routes of Contamination
Pathway |
Explanation |
Direct Application |
Spraying close to harvest can result in leaf residue |
Soil Absorption & Root Uptake |
Glyphosate binds to soil but can be absorbed by roots |
Drift from Neighboring Farms |
Uncontrolled herbicide spray from nearby crops contaminates tea plants |
Contaminated Water Sources |
Irrigation with glyphosate-contaminated water |
Cross-contamination During Processing |
Shared facilities with contaminated crops or equipment |
Foods and Tea Categories at High Risk
Glyphosate residues are most frequently found in:
- Black Tea
- Green Tea
- Herbal and Infused Teas
- Ready-to-Drink (RTD) Teas
- Instant or Granulated Tea Extracts
Other food categories with glyphosate concerns include cereals, legumes, pulses, oats, and honey.
Industrial & Food Sector Concerns
Concern Area |
Key Issues |
Food Safety & Consumer Trust |
- Exceeding MRLs can lead to product recalls and bad publicity |
Export & Trade Compliance |
- EU MRL for glyphosate in tea: 0.1 mg/kg |
Brand Protection & Certifications |
- Violations may void organic, Fair Trade, or Rainforest Alliance certifications |
Economic Impact on Industry |
- Shipment rejections cause heavy losses |
Health Risks Associated with Glyphosate Residues
Health Impact |
Scientific Observations |
Carcinogenicity |
Classified by IARC as a probable human carcinogen (Group 2A) |
Endocrine Disruption |
Alters hormonal signaling, especially reproductive hormones |
Gut Microbiota Disruption |
Affects beneficial gut flora, possibly contributing to metabolic issues |
Reproductive Toxicity |
Linked to reduced fertility and fetal developmental issues |
Liver and Kidney Damage |
Chronic exposure associated with organ toxicity in multiple studies |
Regulations and standards
Fssai
The Food Safety and Standards Authority of India (FSSAI) has established a maximum residue limit (MRL) for glyphosate in tea at 1 mg/kg (1 part per million) of dry tea leaves. This is the official tolerance level for glyphosate residues allowed in tea sold in India.
https://www.fssai.gov.in/upload/uploadfiles/files/Compendium_Contaminants_Regulations_28_01_2022.pdf
European Union
The European Union’s maximum residue limit (MRL) for glyphosate in tea—set at 0.01 mg/kg—is established under Regulation (EC) No 396/2005. This regulation provides the legal framework for setting and enforcing MRLs for pesticides in food and feed within the EU
https://eur-lex.europa.eu/eli/reg/2005/396/2016-05-13
Glyphosate Residue Testing – Methods & Analytical Parameters
Method |
Highlights |
LC-MS/MS |
High sensitivity, low detection limits |
HPLC with Fluorescence |
Cost-effective for bulk testing |
GC-MS (after derivatisation) |
Effective for volatile conversion |
ELISA Kits (Field Screening) |
Quick and affordable |
Analytical Parameters in Glyphosate Testing
Parameter |
What It Detects |
Why It's Important |
Glyphosate |
Main herbicidal compound |
Measures residue levels for regulatory compliance |
AMPA |
Metabolite of glyphosate |
Indicates long-term or indirect environmental exposure |
Glufosinate |
Alternative herbicide |
Helps differentiate residues from co-applied herbicides |
Matrix Effects |
Interference from tea compounds |
Requires cleanup to prevent false results due to caffeine/tannin interference |
LOD & LOQ |
Detection and quantification limits |
Ensures methods meet strict MRLs, especially EU’s 0.1 mg/kg limit |
Recovery Rates |
Extraction efficiency from tea matrix |
Validates accuracy, reproducibility, and method reliability |
Eurofins Glyphosate & Residue Testing Solutions for the Tea Industry
About Eurofins
Eurofins Analytical Services India Pvt. Ltd., part of the global Eurofins Scientific Group, is a leading provider of food and agricultural testing solutions. With state-of-the-art laboratories, US FDA (LAAF) recognition, NABL accreditation, and FSSAI approval, Eurofins ensures that your products meet both national and international food safety and export standards.
Glyphosate & Herbicide Residue Testing
As global concern grows around chemical residues in food and beverages, especially tea, glyphosate testing has become essential to meet regulatory requirements and build consumer trust.
Our Glyphosate Testing Covers
Analyte |
Purpose |
Glyphosate |
Main herbicide compound; primary target for regulatory compliance |
AMPA |
Primary metabolite; indicates long-term exposure via soil or water |
Glufosinate |
Related herbicide; tested to ensure no cross-contamination or co-application |
Testing Technologies
Method |
Benefits |
LC-MS/MS |
High precision and sensitivity |
HPLC-Fluorescence |
Efficient for batch testing |
GC-MS (after derivatisation) |
Used for specialized volatile profiling |
ELISA Field Kits |
Suitable for on-site plantation-level screening and decision-making |
Export Readiness & Certification Support
Eurofins supports tea producers and exporters by ensuring compliance with:
- European Union MRL for glyphosate (0.1 mg/kg)
- FSSAI pesticide residue regulations
- US FDA and Japanese market requirements
- Organic certification standards (zero glyphosate tolerance)
- Rainforest Alliance and Fair Trade compliance (sustainability and residue-free assurance)
Comprehensive Testing Solutions for the Tea & Food Industry
In addition to glyphosate testing, Eurofins offers an extensive portfolio of services across tea, herbs, spices, and processed foods:
Pesticide Residue Analysis
- Testing for 500+ pesticide residues
- Compliant with EU, Codex, and Indian MRL regulations
- Techniques: QuEChERS, LC-MS/MS, GC-MS/MS
Heavy Metals Testing
- Detection of Lead, Cadmium, Arsenic, and Mercury
- Performed using ICP-MS technology
- Aligned with FSSAI and EU limits
Mycotoxin Screening
- Analysis for Aflatoxins, Ochratoxin A, and others
- Conducted using high-sensitivity LC-MS/MS platforms
Microbiological Analysis
- Detection of pathogens including Salmonella, E. coli, yeast, moulds, and total plate count
- Ensures food safety and shelf-life stability
Nutritional & Labeling Analysis
- Determination of proximate composition, caffeine, antioxidants, vitamins, and minerals
- Label compliance as per FSSAI and international standards
Adulteration & Authenticity Testing
- Screening for foreign matter, artificial dyes, synthetic coloring agents
- Techniques include NMR, FTIR, and botanical DNA analysis
Contaminants Testing
- Screening for PAHs, Dioxins, PCBs, Acrylamide, and other harmful compounds
- Meets EU and Codex Alimentarius guidelines
Why Partner with Eurofins?
Feature |
Benefit |
Global Laboratory Network |
900+ labs in over 60 countries; standardized and globally accepted methods |
LAAF Recognition by US FDA |
First food testing lab in Asia approved under the FDA’s LAAF program |
Fast Turnaround Time |
Rapid reporting to avoid export delays |
Regulatory Expertise |
Guidance on FSSAI, EU, Codex, US FDA, and organic certification standards |
Digital Reporting & Certificates |
Export-ready, secure, and compliant documentation |
Customized Testing Packages |
Tailored solutions for estates, processors, exporters, and brand owners |