Is there toxic glyphosate or heavy metals inside oat milk? That’s the question we were asked inside the Mamavation community. Glyphosate is a broad-spectrum herbicide classified as a probable human carcinogen by the World Health Organization (WHO) and has been found in many popular oat-based foods according to a recent consumer study. Arsenic, cadmium, lead, & mercury are all problematic heavy metals found in popular foods. But do these contaminants reside in oat milk? To answer this question, Mamavation sent 13 of the most popular oat milk products to an EPA-certified lab and found glyphosate & heavy metals. You’ve trusted Mamavation to bring you other consumer studies like best yoga pants without PFAS “forever chemicals,” best nut butter without PFAS, and best ketchup without PFAS, now join us for our consumer study on popular oat milk.
Disclosure: This consumer study is released in partnership with Environmental Health News. Scientific reviews were performed by (1) Terrence Collins, Teresa Heinz Professor of Green Chemistry & Director of the Institute for Green Sciences at Carnegie Mellon University, (2) Linda S. Birnbaum, Scientist Emeritus and Former Director of the National Institute of Environmental Health Sciences and National Toxicology Program & Scholar at Residence at Duke University, North Carolina University, & Yale University, & (3) Pete Myers, Chief Scientist at Environmental Health Sciences, Adjunct Professor of Chemistry at Carnegie Mellon University, and Co-Author of Our Stolen Future. This post was medically reviewed by Sondra Strand, RN, BSN, PHN. Donations were provided by Environmental Health News and Mamavation community members. This post contains affiliate links.
Mamavation Finds Glyphosate & Heavy Metals In Popular Oat Milk
First, let’s review oat milk and its use. Store-bought oat milk is a popular staple in many households that are seeking dairy-free milks. Many brands add additional ingredients to improve texture, flavor, nutrients, and consistency. While some people make homemade oat milk by straining oats in cheesecloth or a fine mesh sieve, most people (including many vegans) are still purchasing their plant-based milks from the grocery store aisle for convenience, better taste, and longer shelf life. Not all oat milk is safe for people with gluten intolerance, celiac disease, or gluten sensitivities. Certified gluten-free oats must be used in order to protect that population. It’s also important to mention that not everyone likes oat milk. Some people refer to it as slimy and need to cover up the taste with vanilla, maple syrup, or a pinch of salt. However, this plant-based milk alternative has become very popular and the Mamavation community asked us to test it for glyphosate and heavy metals.
Mamavation’s Oat Milk Consumer Study
Mamavation sent 13 oat milk products to an EPA-certified lab testing for glyphosate, its main metabolite aminomethylphosphonic acid (AMPA), and heavy metals. AMPA is a breakdown chemical that emerges when glyphosate has been in the environment and is breaking down over time. The detection level of our EPA-certified lab to determine the presence of glyphosate and AMPA was 10 parts per billion (ppb). Our lab also tested for heavy metals (arsenic, cadmium, lead & mercury) at 10 parts per billion because sometimes glyphosate can bind to metal ions during testing when complex matrices are present.
Here are the main findings of our consumer study:
- 15% of oat milk sent to the lab was reported to contain either glyphosate or some type of heavy metal (arsenic, cadmium, lead, & mercury). That’s 2 out of 13 products.
- About 8% of oat milk sent to the lab was reported to contain glyphosate above 10 ppb. That’s 1 out of 13 products.
- About 8% of oat milk sent to the lab was reported to contain a heavy metal — arsenic, above 10 ppb, the US water standard. That’s 1 out of 13 products.
- 2 popular oat milk brands with Prop. 65 warnings (Rise & Elmhurst) did not contain detectable heavy metals above 10 parts per billion (ppb). In other words, if they contain dangerous amounts of heavy metals, it wasn’t present in the batches we tested.
- No organic or “glyphosate residue-free” certified brands had any detection of glyphosate above 10 parts per billion (ppb).
- Because widespread use of glyphosate was established in prior consumer studies looking at common oat products, we believe that it’s possible glyphosate could be present in some products but just not in detectable levels based on how diluted the oats are in oak milk.
- No cadmium, lead, or mercury were found in any products (above 10 ppb).
Linda Birnbaum, Mamavation’s Scientific Advisor and Scientist Emeritus and Former Director of the National Institute of Environmental Health Sciences (NIEHS) and National Toxicology Program & Scholar at Residence at Duke University, North Carolina University, & Yale University, had a few things to say: “Oat milk is consumed by many people as a drink alternative that goes into coffee, cereals, baked goods, and other foods. This is why it’s important to select products that do not have detectable glyphosate or other heavy metals in order to protect your family (and yourself) from the complications that can arise from daily exposure to hormone-disrupting chemicals. One exposure would be fine, but daily exposure is concerning. “
Glyphosate Is Problematic to Human Health & Use Has Skyrocketed
The use of glyphosate spraying skyrocketed with the introduction of genetically engineered Roundup Ready crops, such as GMO corn, soybeans, cotton, canola, & sugar beets. It was first approved in 1996 under the Clinton administration. In contrast, in 1995 farmers were using 40 million pounds of glyphosate, but by 2014 that number has increased to 280-290 million pounds according to the Environmental Protection Agency (EPA). More recently, since 1992 Midwestern corn and soybean farmers have increased their usage of glyphosate nearly 40 times and by 2016 were using a total of 188.7 million pounds.
This is very problematic to the surrounding community because the International Agency for Research on Cancer (IARC) found glyphosate is linked to cancer in humans, thus making it a probable human carcinogen. In addition to cancer, scientists have linked glyphosate exposure to the following human health risks:
- Harms beneficial gut bacteria
- Birth defects
- Reproductive issues, such as miscarriages
- Shorter pregnancies
- Increased infant mortality
- Certain cancers, like non-Hodgkin lymphoma and breast cancer
- Liver and kidney damage with exposure as low as 0.05 parts per billion (ppb) and linked to altering gene function of over 4,000 genes in the kidneys and livers of rats at 0.1 parts per billion (ppb) from glyphosate formulations.
Our Scientific Advisor Terrence Collins, Teresa Heinz Professor of Green Chemistry & Director of the Institute for Green Sciences at Carnegie Mellon University had this to say:
“To my thinking, glyphosate residues in food products are troubling at any level. Beyond the broad evidence of adverse effects of glyphosate itself, it is well-known that glyphosate can bind metal ions, including toxic ones like lead, cadmium, mercury, and arsenic. Thus, glyphosate agricultural usage can bring doubly whammy toxicants into food products. So it was excellent of Mamavation to check for these key toxic elements in the various oat milk products. And it is encouraging that most products were found to be free of such heavy metal contamination above 10 parts per billion. Similarly, Mamavation found most products to be free of glyphosate above 10 ppb and this also is an encouraging finding. Clearly, the company with glyphosate and arsenic above 10 ppb would be well advised to discover why these are there and eliminate them.”
Why is Glyphosate Found in Oat Products?
According to a study by the Detox Project, which is an organization certifying food products as “glyphosate residue-free” many types of oat products have been reported to contain glyphosate. Here are some examples from their report.
- Quaker Oats (from HyVee) — 535 parts per billion (ppb) glyphosate
- The Grainery Fresh Milled Oats (from HyVee) — 214 parts per billion (ppb) glyphosate
- General Mills CheeriOats (aka Cheerios from Target) — 118 parts per billion (ppb) glyphosate
- Natural Grocers Organic Thick Rolled Oats (from Natural Grocers) — 26 parts per billion (ppb) glyphosate
- Whole Foods Market Organic Steel Cut Oats (from Whole Foods) — 13 parts per billion (ppb) glyphosate
- 365 Barley & Lentils (from Whole Foods Market) — 134 parts per billion (ppb) glyphosate
According to the Detox Project, pre-harvest desiccation could be the reason why glyphosate is found in such high amounts in healthy foods. What is pre-harvest desiccation? This is when glyphosate is sprayed on crops in the late season just before they are due to be harvested. The extra spraying of glyphosate works to dry out the crops in the field early and thus it shortens the time they are in the field. This saves money and resources for the farmer and food companies, which is why it’s done. But at what cost do consumers pay for early crop drying? Glyphosate has staying power and persists on food and can be found at higher levels because of this practice.
Crops that are most likely to be desiccated are wheat, chickpeas, yellow peas, oats & other beans. So how is this impacting oat milk? Oats are diluted heavily with water and other additives when made into oat milk, so it makes sense that if glyphosate is present, it would be present in far lower amounts. This is exactly what our labs found — little to no glyphosate present at detectable levels.
Pete Myers, Chief Scientist at Environmental Health Sciences observes “I used to eat oat products frequently, but when I learned about pre-harvest desiccation I stopped eating any oats that weren’t grown organically. This includes oatmeal breakfasts at breakfast bars and instant oatmeal, even oatmeal cookies. I’d apply the same standard to oat milk. Over 100 ppb is not a low amount.”
Heavy Metals in Food & Beverages & California Prop. 65
Mamavation decided to also test oat milks for heavy metals because glyphosate can bind to metal ions in complex matrices. We are unsure if this is happening inside the glyphosate testing of Oatmilk, but decided that having heavy metal testing done was still valuable to our audience in general.
California’s Prop. 65 has established “safe harbor levels” for most of the heavy metals we tested: arsenic, cadmium, lead, & mercury. Prop. 65 requires businesses to provide warnings to consumers living in California about significant exposures to chemicals that cause cancer, birth defects, or other reproductive harm. These chemicals can be in the products they purchase, in their homes or workplaces, or released into the environment. By requiring this information to be provided, it enables consumers in California to make informed decisions about their exposure to these chemicals.
Here are the No Significant Risk Levels (NSRL) and the Maximum Allowable Dose Levels (MADL) established by the State of California for the heavy metals we tested:
- Arsenic: 0.06 ug/day (inhalation), 10 ug/day (except inhalation)
- Cadmium: 0.05 ug/day (inhalation), 4.1 ug/day (oral)
- Lead: 0.5 ug/day level for reproductive toxicity, 15 ug/day (oral) for carcinogens
- Mercury: no established levels
Our EPA-certified lab tested each heavy metal at 10 parts per billion (ppb), which is below each safe harbor level established by California. Therefore, we are going beyond what California would establish to be a warning level.
So how do heavy metals find their way into oat milk? Officially, we are not certain, but here are some theories based on how other food products are contaminated:
- Naturally Occurring: Heavy metals are naturally present in the soil in different concentrations based on the geology of the land. For instance, more cadmium is found in certain soils in South America and less in certain African soils.
- Legacy Pesticide Use: For many decades, heavy metals were added to pesticides as an adjunct and can still be found in soils that had a history of certain pesticide use.
- Manufacturing Contamination: Heavy metals can be found in many situations in terms of manufacturing, like with machinery, joints, storage containers, etc. and can contaminate food and personal care products that way.
- Storage: In places where heavy metals are present in the soil, storing and drying certain crops outside can present a contamination risk like with dark chocolate.
- Air Pollution: Heavy metals can start as air pollution from manufacturing byproducts from polluted industrial areas and can find their way into other parts of the world through the wind and through bodies of water. An example of this is how mercury is found in high levels in Tunafish but likely starts as air pollution from coal-burning plants.
Mamavation’s Raw Data From Our EPA-Certified Laboratory
To recap, Mamavation sent 13 oat milk products to an EPA-certified lab testing for glyphosate and AMPA, its breakdown chemical. 8% of oat milk sent to the lab was reported to contain glyphosate and 8% of oat milk was reported to contain a heavy metal–arsenic. That’s 2 out of 13 popular products we tested. We are now revealing which popular brand of oat milk was contaminated with glyphosate and heavy metals and then later which brands we recommend based on their ingredients. We are also showing you what ingredients are inside each product, so you can make your own educated decision on oat milk purchases.
Not Our Favorite Oat Milk
Reporting from our lab indicated that these products had trace amounts of glyphosate herbicide or heavy metals. We also tested for AMPA, glyphosate’s breakdown chemical.
- Oat Malk Original Organic — 12 parts per billion (ppb) total arsenic, non-detect glyphosate, AMPA, lead, mercury, & cadmium (Ingredients: Filtered water, organic gluten-free oats, Himalayan pink salt)
- Silk Original Oat Deliciously Creamy — 14 parts per billion (ppb) glyphosate (no detectable AMPA) Non-detect arsenic, cadmium, lead, & mercury. (Ingredients: Oatmilk (filtered water, oat concentrate), Contains 2% or less of: sunflower oil, Vitamin and mineral blend (calcium carbonate, Vitamin A Palmitate, Vitamin D2, Riboflavin [B2], Vitamin B12), Dipotassium Phosphate, Sea Salt, Gellan Gum, Locust Bean Gum, Ascorbic Acid (Vitamin C to protect freshness), natural flavors)
Better Oat Milk
These products were sent to an EPA-certified laboratory testing for glyphosate, AMPA, arsenic, cadmium, lead, & mercury. They were all found to be non-detect. However, there are some other issues with other ingredients we found that made them slightly less desirable, such as using junky additives, preservatives, undisclosed non-organic flavorings, & other non-organic ingredients.
- Califia Farms Oat Barista Blend Oatmilk — non-detect glyphosate and AMPA, non-detect for lead, cadmium, arsenic, & mercury (Ingredients: Oatmilk (water, oats), sunflower oil, minerals (dipotassium phosphate, calcium carbonate, tricalcium phosphate), sea salt)
- Chobani Oatmilk Extra Creamy — non-detect glyphosate and AMPA, non-detect for lead, cadmium, arsenic, & mercury (Ingredients: Oat blend (water, whole grain oats), rapeseed oil, contains 2% or less of: sea salt, vitamin A palmitate, vitamin D2 (yeast extract), calcium carbonate, gellan gum, dipotassium phosphate.)
- Elmhurst Milked Oats Sweetened — non-detect glyphosate and AMPA, non-detect for lead, cadmium, arsenic, & mercury (Ingredients: filtered water, whole grain oats, cane sugar, salt, natural flavors)
- Nut Pods Barista Oat Milk Cinnamon Dolce — non-detect glyphosate and AMPA, non-detect for lead, cadmium, arsenic, & mercury (Ingredients: Oatmilk (water, whole oats), erythritol, high oleic, sunflower oil, contains less than 2% of: fava bean protein, dipotassium phosphate, calcium phosphate, cinnamon, natural flavors, sea salt, gellam gum, stevia leaf extract.)
- Oatley Barista Edition Oat Milk — non-detect glyphosate and AMPA, non-detect for lead, cadmium, arsenic, & mercury (Ingredients: Oat base (water, oats), low erucic acid rapeseed oil. Contains 2% or less of: dipotassium phosphate, calcium carbonate, tricalcium phosphate, sea salt, dicalcium phosphate, riboflavin, vitamin A, vitamin D2, vitamin B12.)
- Planet Oat Oatmilk Unsweetened Original — non-detect glyphosate and AMPA, non-detect for lead, cadmium, arsenic, & mercury (Ingredients: Oatmilk (filtered water, oats), calcium carbonate, dipotassium phosphate (stabilizer), guar gum, sea salt, gellan gum, vitamin A palmitate, Vitamin D2, Riboflavin (Vitamin B2) and Vitamin B12)
Best Oat Milk
These products were sent to an EPA-certified laboratory and found to have non-detect levels of glyphosate, AMPA, lead, cadmium, arsenic, & mercury. They are also certified organic, so will have fewer problematic ingredients and other pesticide residue.
- Califia Farms Organic Oatmilk Original — non-detect glyphosate and AMPA, non-detect for lead, cadmium, arsenic, & mercury (Ingredients: water, organic oats, sea salt)
- Kirkland Signature Organic Oat Non-Dairy Beverage Made with Rolled Oats — non-detect glyphosate and AMPA, non-detect for lead, cadmium, arsenic, & mercury (Ingredients: Organic oat base (filtered water), organic rolled oat flour), organic sunflower oil or organic canola oil, calcium carbonate, sea salt, sunflower lecithin, organic natural flavors, ergocalciferol (Vitamin D2), Vitamin A Palmitate, Riboflavin (Vitamin B2), Cyanocobalamin (Vitamin B12).)
- Oatsome Organic Oat Milk — non-detect and AMPA, non-detect for lead, cadmium, arsenic, & mercury (Ingredients: Oat milk (water, whole grain gluten-free organic oats), organic sunflower oil, sea salt, calcium carbonate, riboflavin, vitamin D, vitamin B12)
- Rise Brewing Company Organic Oatmilk Original — non-detect and AMPA, non-detect for lead, cadmium, arsenic, & mercury (Ingredients: water, organic oats, organic sunflower oil, sea salt, potassium carbonate)
- Three Trees Organic Oatmilk with Seeds — non-detect and AMPA, non-detect for lead, cadmium, arsenic, & mercury (Ingredients: Filtered water, gluten-free oats, sunflower seeds, pumpkin seeds, flaxseeds)
Wordle answer today
With the help of our guide, you can solve any Wordle puzzle quickly and easily.
Who cares? They were detected at 12 parts per BILLION.
First, and most importantly, at that detection level you’ll find practically anything you want. You’ll find the farmers hair at that level of detection.
Next, and extremely more importantly, the safe limit of glyphosate in oats is at 30 parts per million, or 30,000 parts per billion.
So, they detected 0.04% of the safe limit.
Zero Point Zero Four of a percent of the safe limit.
They detected an amount that is 29,988 parts under the safe limit.
How many more ways do I need to say that this warning is completely bunk.
Too bad I seriously doubt my post will stay up, as websites like this remove correct and factual information all the time.
The levels of glyphosate detected are so low that it’s physically impossible for someone to consumer enough to reach the ADI (1mg/kg/day in the US, 0.5mg/kg/day in the EU).
For the Quaker Oats, the detected level from the Detox Project data was 535ppb.
This equates to 0.535mg/kg.
Using the EU (more conservative measure) ADI of 0.5/mg/kg/day, someone would need to consume 93.5% of their body mass daily…and that’s dry weight.
For glyphosate, it’s even more ridiculous, as that 12ppb equates to 0.012mg/kg.
A person would need to drink 4,167% of their body mass daily…and no this is not a typo. To reach the ADI of 0.5mg/kg/day, it requires someone to consume almost 42 times their body mass DAILY.
In truth, the only reason to report the values as ppb, is to artificially inflate the perceived levels in consumers who aren’t familiar with the underlying toxicology.
This is also probably why there’s no mention of the current regulatory limits.
Oh, and even going over the ADI really isn’t a problem, as you actually need to exceed the No Observed Adverse Effect Limit (NOAEL) before we start to see harmful effects in chronic toxicity studies.
The NOAEL is generally around 100mg/kg/day.
I assume that means Trader Joe’s oat milk also contains glyphosate since it’s not organic.
I’ve been following you and Mommypottamus for a few years now and as a father of a 6 and 8yr old daughters, I really appreciate all the wonderful info you put out there. I’ve been heavily involved in health and wellness for the last 20yrs and the research you do for your readers is incredible🙏🏼
Thank you for this testing! Did you look into MALK milk?
The EPA-certified laboratory that examined these items discovered non-detect amounts of glyphosate, AMPA, lead, cadmium, arsenic, and mercury. Additionally, because they are organically grown, they will have fewer questionable substances and other pesticide residues.
Phew. We actually use Oatsome on occasion when I don’t get a chance to make our own milk. Glad it was tested. Thank you!
Thank you for doing this and letting us know what the acceptable levels are. Appreciate you and everyone working with you.🙂 A big “phew!” When I saw the brand I buy.
Disappointed that after all that hard work (thank you!) you still recommended Kirkland, Oatsome and Rise Brewing Company. All of these oatmilk products contain sunflower and/or canola oil which are highly processed, bleached, denuded oils that are cheap but are harmful to the energy generating mitochondria of our cells. Looks like there’s only two choices in the “Best of” category… On another note–are cat litter products made from corn safe (i.e. World’s Best Cat Litter)? I’m assuming it’s not organic corn since it is not labeled that way. And for the most part cats are not ingesting it. However, they do kick up dust as do I when I clean the solid matter from the box several times a day. I have asthma. Are the cats and I inhaling glycosate dust?
What about Trader Joe’s oatmilk in the cold section and carton?
Another problem is the ones including sunflower products as sunflowers can contain lead depending where they are sourced (most sourced from eastern Europe).
You did check some Oatley.
Did you check Oatley? It’s so good and popular. Hidden Figures also is used a lot.
What about Oatley Milk in General.
I drink the Oatley whole milk
Hi can you tell us about Forager cashew milk (made with oats as well as cashews) please?
I love the study and information provided.
One thing that doesn’t make sense is you mention California’s MADL amount for cadmium is 4.1microgram/L…..and then you say “Our EPA-certified lab tested each heavy metal at 10 parts per billion (ppb), which is below each safe harbor level established by California”.
4.1 microgram/L=10ppb, therefore testing at 10ppb cannot detect potentially hazardous level of cadmium because it is over twice as high as the safe harbor level established by California for cadmium.
***IT would be very helpful if you would use the same units of measure when talking about your testing and levels used. Many people don’t know how to convert microgram/L to ppb or ppm, and also there is the issue of microgram/g, which is different and it can get confusing.
Please clarify regarding cadmium levels. If your ‘non-detect’ designation means less than 10ppb, that can still be higher than MADL, which is 4.1ppb.
Also, can it be assumed that 1 serving of Silk oat milk has the 14ppb of glyphosate in it? Is it per liter?
Unfortunately, they rely on the confusion in order to stoke fear.
If they were to report the values from within the normal context and standards in toxicology, the levels of glyphosate should be reported in mg/kg (mg/L), and also be compared to the ADI, which is 1mg/kg/day in the US or 0.5mg/kg/day in the EU.
They won’t do this, because then it would be obvious that it’s impossible for anyone to consume enough to even come close to the current limits, let alone the levels above which we actually do see harm, which is orders of magnitude above this.
How they can pretend that a risk exists when someone needs to drink almost 42X their body mass daily to hit the EU ADI, and eat 97% of their body mass in dry oats daily to hit the same level, it’s just reeks of purposeful misinformation.
Thank you for your efforts in this. It was a really thorough read. I formerly was purchasing Oatly for my dairy-allergic kiddo and myself. Then they switched away from organic oats in the US during the pandemic and with the spike in demand. During that time, I also learned how terrible rapeseed/canola is, and was horrified that it is added to so many food and beverage items. With that, we switched over to organic coconut milk. I miss the creaminess of Oatly, but I don’t miss what I was potentially putting into our bodies unknowingly.
We need more movements to get these harmful products out of our crops and foods!
Thank you so much for investigating glyphosate and heavy metals. People have no idea what ends up in our bodies because of bad production processes