Weet-Bix Glyphosate Testing

In July 2025, we carried out independent testing on Weet-Bix-style cereals sold in New Zealand.

The results were not uniform. Some samples showed no detectable glyphosate. One returned a very low level. One stood out at a higher level than expected. 

That raised a simple but important question: Was that result a one-off — or part of a broader pattern?

Why We’re Testing Again

We’re now planning a follow-up round of testing focused specifically on Weet-Bix-style wheat biscuit products. This isn’t about repeating the same test for the sake of it. It’s about understanding whether glyphosate residues are:

• consistent across batches
• influenced by sourcing or country of origin
• or simply variable in ways we don’t yet fully understand

Because if results vary, then one test isn’t enough.

What This Round Will Do

This next phase will:

• Revisit previously tested product types
• Expand to include additional supermarket home-brand options
• Build a clearer comparison across similar products

All samples will be sent to an accredited laboratory, and all results will be published in full.

What Your Support Funds

Independent testing isn’t funded by industry or government. Each sample costs approximately $415 NZD to test.

This includes:

• Laboratory analysis (glyphosate, AMPA, glufosinate)
• Sample preparation and handling
• Full documentation and reporting

Our goal is to fund a full round of testing of six products.

Why This Matters

Weet-Bix-style cereals are a staple food in many New Zealand households. They’re often seen as simple, reliable, and healthy.

But as our first round of testing showed, even within this category, results can vary. Understanding that variation matters—not just for one product, but for how we think about food systems more broadly.

How You Can Help

This work only happens if people choose to support it.

Every contribution helps fund another sample, another test, another piece of data.

👉 Support the next round of Weet-Bix glyphosate testing

One test gives you a result

Repeat testing starts to reveal a pattern.