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The Herbicide Awareness and Research Project is raising awareness of, and conducting independent scientific research into, the health-related effects of chronic exposure to the weed killer glyphosate.

Be Part of a Citizen Science Investigation of Glyphosate!

Glyphosate, the active ingredient in the herbicide Roundup, is the most commonly used weed killer in the world. Among its many uses, it is sprayed onto genetically modified (GM) crops, including most GM corn and soy.  In addition to GM crops, glyphosate  is applied as a drying agent to the majority of non-GM grains grown in the U.S., including wheat and oats. In the U.S., nearly 2 million tons of it have been applied to our crops; globally, nearly 9.5 million tons.

Glyphosate is found in these crops at harvest and accounts for the vast majority of our exposure to it.  

Scientific studies have raised significant questions regarding glyphosate's potential relationship with a number of human illnesses. 

In March 2015 the World Health Organization’s (WHO) listed glyphosate as “probably carcinogenic." In July 2017, the state of California added glyphosate to its list of chemicals and substances known to cause cancer.

Citizen Science Map

See our developing Citizen Science map of glyphosate levels around the US. As more and more of you have your glyphosate levels determined, your data will further populate the map and you will be able to compare your results against the ever increasingly accurate normative population database.

Map of glyphosate levels by state

Test Yourself

We believe that everyone should know their glyphosate level and make appropriate changes in their diet if needed Our exposure to glyphosate can be easily determined by measuring its excretion level in a urine sample. TEST YOURSELF

We Need Your Help!

  • Contribute specimens directly to our Citizen Science Database! Select the glyphosate test kit you would like from the list of options* **.
    • Your kit will be sent via mail 2-3 days after payment.
    • Once your sample is received, you will receive your results within 3 weeks, which will include your own urine excretion levels of glyphosate and its primary metabolite aminomethylphosphonic acid (AMPA).
    • Along with providing the sample, we will ask you a few questions to aid our research efforts into the health-effects of chronic glyphosate exposure.
    • As our database grows, you will be able to compare your results against an ever increasingly accurate normative population database.
  • Make a financial contribution of any size to aid our work to examine whether rising glyphosate levels are associated with adverse health effects over time. There has been little federal funding available to conduct this vital line of research. Crowdfunding allows our work to be conducted and to be truly independent. Donate here.
  • Share our story using the Facebook, Twitter, or LinkedIn share links above. Or, email it to your friends using the Email link.

Our Research Objectives 

Our research program is dedicated to providing answers to vital questions regarding chronic glyphosate exposure and human health. In our initial research, as shown in the figure below, we demonstrated that the substantial increase in glyphosate use on our food supply over the past 23 years has been associated with a parallel significant increase in glyphosate excretion in urine, an indicator of exposure to glyphosate. 

See publication: Excretion of the Herbicide Glyphosate in Older Adults from 1993-2016. Research Letter. Journal of the American Medical Association vol 318(16):1610-1611, 2017.

These data were obtained by measuring glyphosate in 5 different urine samples repeatedly obtained from 50 US adults in the San Diego region between 1993 and 2016.  

In the 2014-2016 sampling, approximately 70% of adults had detectable levels of glyphosate in their urine, a roughly 7-fold increase over the 23 year period. In the 2014-2016 sampling the  group glyphosate level   0.449 μg/L , with levels in some individuals reaching as high as 2.66 μg/L .

Animal and human studies suggest that chronic exposure to glyphosate-based herbicides can induce adverse health outcomes (see "Additional Reading" section at the bottom of this page). 

Test Yourself

We believe that everyone should know their glyphosate level and make appropriate changes in their diet if needed.  TEST YOURSELF.

Next Steps

Despite concerns that our chronic exposure to glyphosate may be associated with adverse health outcomes, there is little human research on this topic.

As such, our next research steps are to provide this vitally needed information. With your help, we will:  

  1. Develop a large national citizen science database of glyphosate exposure and link that exposure to lifestyle information and health outcomes.
  2. Continue to examine 23-year longitudinal exposure to glyphosate and clinically-relevant health outcomes in our San Diego cohort. We will do this by examining detailed health and illness records from a large population sample (the Rancho Bernardo Study) for which we have documented rising glyphosate levels.

About Us

This research is being conducted at the Center of Excellence for Research and Training in Integrative Health in the Department of Family Medicine and Public Health at the University of California San Diego. UC San Diego is one of the top-ranked public research universities in the nation. UC San Diego School of Medicine faculty rank #1 in the nation in federal research funding per faculty member. The Department of Family Medicine and Public Health is ranked #1 in the nation among Family Medicine departments. UC San Diego ranks 4th in the world in terms of 'citation impact' in science, with world wide notable faculty. For this project, we are working with an independent national analytical chemistry laboratory.

To learn more about our work, please visit:

Existing Scientific Literature on Glyphosate

There are currently ~2500 scientific articles on glyphosate. Despite this large number of publications and significant lingering questions, there are few studies directly examining the effects of chronic glyphosate exposure on human health. Our research program is directly examining this significant gap in the scientific literature.

Additional Reading

GMOs, Herbicides, and Public Health.

Is it time to reassess current safety standards for glyphosate-based herbicides?

Carcinogenicity of tetrachlorvinphos, parathion, malathion, diazinon, and glyphosate.

Compositional differences in soybeans on the market: glyphosate accumulates in Roundup Ready GM soybeans.

Concerns over use of glyphosate-based herbicides and risks associated with exposures: a consensus statement.

Glyphosate and Its Degradation Product AMPA Occur Frequently and Widely in U.S. Soils, Surface Water, Groundwater, and Precipitation.

Trends in glyphosate herbicide use in the United States and globally.

Glyphosate epidemiology expert panel review: a weight of evidence systematic review of the relationship between glyphosate exposure and non-Hodgkin's lymphoma or multiple myeloma.

Glyphosate, pathways to modern diseases II: Celiac sprue and gluten intolerance.


* Glyphosate levels in urine provide a valid assessment of exposure to glyphosate. They are not, however, used for diagnosis, prevention, or treatment of disease. 

** At present we can only run samples for the US and Canada. In addition, we cannot currently test samples from New York because the state has a lengthy approval process for direct-to-consumer (DCT) testing. We hope to be expand our available testing sites in the near future.

Canadian Residents

HRI Labs requires you to provide return postage. Click here for simple steps to ship samples to the U.S.


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