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Food Testing >> Blog >> Glyphosate in Tea

Glyphosate in Tea

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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.

glyphosate-in-tea

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
- Rising consumer demand for organic or residue-free teas

Export & Trade Compliance

- EU MRL for glyphosate in tea: 0.1 mg/kg
- Non-compliance causes export delays or rejections
- Hurts international brand reputation

Brand Protection & Certifications

- Violations may void organic, Fair Trade, or Rainforest Alliance certifications
- Repeated issues can lead to decertification

Economic Impact on Industry

- Shipment rejections cause heavy losses
- Additional costs for reprocessing, testing, and logistics affect margins and contracts

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
 Ideal after FMOC-Cl derivatisation

HPLC with Fluorescence

Cost-effective for bulk testing
 Good for screening; limited matrix adaptability

GC-MS (after derivatisation)

Effective for volatile conversion
Less common and more complex

ELISA Kits (Field Screening)

Quick and affordable
 Suitable for plantation-level detection

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
Ideal for low-MRL markets (EU, Japan)

HPLC-Fluorescence

Efficient for batch testing
Cost-effective for regular monitoring

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