Our bone broth tested A+++ for heavy metals 🥳 NATURAL AND CLEAN

written by

posted on

April 15, 2025

*Originally published on 3/14/25. Updated on 4/15/25.

Over the past few months a bunch of people asked us if we tested our bone broth for toxic heavy metals. When we get the same question a lot, we of course look into it.

My first question was --- Is there an issue with toxic metals in bone broth? As it turns out, yes, there "can" be an issue!

Heavy metals are naturally present in our environment. We need the "good" heavy metals to thrive: iron, zinc, magnesium, copper, etc. But, we can 100% do without the toxic heavy metals: arsenic, cadmium, lead, mercury, etc.

Too many toxic heavy metals can lead to a host of pretty awful issues: nervous system damage, cardiovascular issues, cancer, endocrine disruption, kidney damage, and so on.

Our body is designed to excrete heavy metals through urine (and a little bit through sweat, hair, and breastmilk too)... but only so much. There's a limit. If you're overloaded, your body will store those heavy metals in your bones, blood, tissues, and organs.

Similarly, if an animal is exposed to heavy metals via food, water, air, dust, or soil, those heavy metals accumulate in the body. Depending on the metal, it can accumulate in the bones, muscle, skin, brain, etc. Maybe the farm's soil or air is contaminated from a nearby factory. Maybe the pipes for the water has lead solder connecting them. Maybe the feed a farm is buying was grown on contaminated soil or processed on contaminated equipment.

And, of course, a main purpose of bone broth is drawing out as much as possible from the bones. If there are heavy metals in bones, they will make their way into the broth. This is especially true when you use apple cider vinegar to draw everything out and make it thick and gelatinous and nutrient rich (like our broth).

And that led me to my second question --- Should I be concerned about every bone broth? Where is the fear coming from? Well... it seems it might be a little political.

There was a study done in the UK in 2013 that scared a lot of people. It's titled "The Risk of Lead Contamination in Bone Broth Diets". This study found high levels of lead in organic chicken bone broth, which is quite concerning. And, in fact, this one study is still cited in articles written today!

Let's dig a little deeper. Let's go farther than the short abstract.

Here are the broths tested in the study and their test results for lead:

(9.5 parts per billion): Broth made from tap water plus skin and cartilage
(7.01 parts per billion): Broth made from tap water plus bones
(2.3 parts per billion): Broth made from tap water plus meat
(0.89 parts per billion): Tap water alone cooked for the same amount of time as a control.

But, they only used organic chicken from one farm. And, there's zero information about that farm, their practices, the feed, and the broth recipe. Did they use vinegar or wine in the broth? Was the chicken's water contaminated with lead? What was the quality of the feed and the soil? Were the chickens raised indoors or outdoors? So many unanswered questions! All we get is that it was one "organic chicken" that created a lead issue with broth.

Another curious thing is that the broth with skin and cartilage contained more lead than the broth made with just bones. Bones are where lead is stored, so why wouldn't the broth made with bones only contain more lead? It's an odd result.

Moreover, the abstract of the study specifically called out "bone broth diets" like GAPS and paleo. They even go so far as to write, "In view of the dangers of lead consumption to the human body, we recommend that doctors and nutritionists take the risk of lead contamination into consideration when advising patients about bone broth diets."

That's quite curious. Why are they worried about these diets? Are the researchers anti healing through food? Who funded the research? Is it political?

My opinion? This study is not comprehensive. It does not speak to all bone broths. But it does cover a potential issue if the water or animals are overloaded with heavy metals. And, as we know, our poor planet is becoming more and more contaminated with toxins like these toxic heavy metals 😢

What I glean from this study is that we need more research. We need to stay vigilant and test from time to time. We don't need fear to spread and people to stop drinking broth from this one study.

Regardless of whether the fear was fabricated or legit, we tested our bone broth anyway. After all, it's always nice to validate that your food choices are as clean as you think.

For Miller's, here were my concerns before testing:

What if there's mercury in the fishmeal in our chicken feed?
What if the soil that our animals live on is contaminated?
What is the well water that the broth is made with is contaminated?
What if the Celtic sea salt has lots of heavy metals?

We actually tested twice. As it turns out, the first test results from March had a LOQ (limit of quantification) that was to high. So, we sent new products in April for testing at a lower LOQ.

The results are in! Our bone broth tested A+++ for arsenic, cadmium, lead, and mercury.

You can find the actual Eurofins test results right here!

For easy reference, here's a chart summarizing the results:

You'll notice that, for every sample, the results are "<2.0 μg/kg" and "<4.0 μg/kg".

The "<" indicates the limit of quantification (LOQ), the lowest concentration that can be accurately tested using the test procedure in that sample type. So if a "<" result appears, it means that none of that metal was found in the sample above the specific reporting LOQ. Whether or not they were present below this LOQ is information that's not provided by the test.

It's also important to note that a μg/kg is a part per billion (ppb). So, for 1 μg/kg, in every billion grams of that food, there would be one gram (or 0.0000001%) of that particular heavy metal. The small numbers matter when it comes to toxic heavy metals, since it doesn't take all that much for your body to become inundated and start experiencing issues or damage.

These results are excellent. It means the broth definitely isn't overloaded with toxic heavy metals and are within safe levels.

Our amazing customers mentioned Mike Adams to me numerous times after we released the first set of broth results. Mike Adams is an outspoken consumer health advocate, investigative journalist, activist, and science lab director. It turns out Eurofins, the lab we used, is a lab that he recommends.

Moreover, our results land us in his highest rating when it comes to heavy metals!

I think we're doing pretty great when it comes to providing clean, natural food. But, one result did make me pause.

You might be thinking what I first thought -- "But wait, you got a reading above 4.0 μg/kg for arsenic. Isn't that bad?"

Let's dive in -- What's up with arsenic?

First off, it's important to note that there are organic forms of arsenic as well as inorganic forms. Our body can handle the organic kind pretty well. But, the inorganic kind is carcinogenic. Our test results show the level of all arsenic, and it doesn't divide inorganic and organic.

Second, as you can see from the Health Ranger rating above, your body can tolerate way more arsenic than the other three toxic heavy metals. It can handle 6x more than cadmium, 25x more than lead, and 103x more than mercury.

Third, it was a mystery to me how arsenic had a reading in the ground beef but not the beef bone broth. Thankfully, that has a pretty easy explanation. Whereas lead mainly accumulates in the bones, arsenic accumulates more in the organs and muscles. And, of course, meat is muscle.

And finally, it was also quite perplexing how arsenic showed in our beef as well as our chicken. You see, our beef and chicken are grown on two separate farms (hours apart) and are processed at two separate processors (also hours apart). They're fed two completely separate diets, too!

My only explanation is farmland in general or maybe even our environment in general.

Organic arsenic has always been naturally present in the soil and water. It's just there in small amounts. But, levels nowadays are likely higher due to overuse of products laden with inorganic arsenic over time.

Starting in the 1940s, conventional farmers would include drugs filled with inorganic arsenic in the feed for pigs and chickens and turkeys to encourage fast growth and prevent disease. Ugh. This actually led to concerns about arsenic poisoning, and that that practice was banned recently, in 2016. It makes me think that all the agri-waste has contaminated our farmland a bit, perhaps in both the soil and water.

And then of course there are synthetic pesticides and herbicides and fertilizers that may contain inorganic arsenic. And their use on conventional farms might runoff everywhere else.

Since our meats are grown on farms that have been naturally managed for some time, I think that's why our arsenic levels were so low, especially compared to conventional meat.

Now, let's compare our results to food in general. Ours are extremely low.

The data below is based on a few scientific studies:

Arsenic: Rice contains anywhere from 90-450 ppb (that includes that rice cereal for babies, too). Meat and poultry in general typically contain 100-200 ppb. The max ours has is 6.8 ppb.
Cadmium: Spinach contains 117-222 ppb. Rice contains 6-19 ppb. Meat and poultry in general contain about 10 ppb. Our has less than 2 ppb.
Lead: Meat and poultry in general contain about 25 ppb. Our has less than 4 ppb.
Mercury: The larger the fish, the more time it has to accumulate mercury. Swordfish and king mackerel can have about 1,000 ppb. Meat and poultry in general contain about 10-50 ppb. Ours has less than 2ppb.

Wow! Putting that into perspective, it looks like our broth and meat are quite clean and extremely low in toxic heavy metals!

Are you satisfied with our heavy metal results? Do you think we should take further action? Should we test other products?

Do you worry about toxic metals (or other junk) in your food? Where have your fears stemmed from?

I'd love to hear from you. You can comment below (no account required) or contact us 😊

-----

Sources

Warning: Fat Holds Toxins. Carnivore and keto folks should watch out.

Aaron, myself, and a couple other team members went to Tennessee to participate in Meatstock 2025 last weekend. It's a carnivore/keto party in the Smoky Mountains. Boy, we learned a lot and met a lot of wonderful people, both people who healed through food as well as doctors and experts that help people heal. One person we had the pleasure of meeting was the amazing Dr. Kiltz. He's a carnivore. He's also a doctor who specializes in fertility. And can you guess how he helps many of his patients? Yup, through food. He's a big supporter of the carnivore and keto diets. He suggests getting 70-80% of your calories from fat, 15-30% from protein, and 0-10% from carbs. Dr. Kiltz spoke at a dinner we attended. And something he said shocked us -- "Don't worry about grass fed, regenerative, and all that natural stuff. It's the fact that you're eating fat that matters." 😳 Woah woah woah. Hold up a sec. We, of course, had a conversation with Dr. Kiltz about this. I mean, why are people having health issues in the first place? Sure, some of it could be genetics. Some of it's definitely environmental. But, a lot of it is likely the food we're eating. It's processed food laden with seed oils and carbs and sugar and yucky additives... but also the farming practices that result in toxic stuff hidden in plain old ingredients. Dr. Kiltz agreed and elaborated on his statement. What he's saying is that, if you're eating a standard American diet, the biggest and fastest impact you can make comes from altering your diet on a macro level - fat, protein, and carbs. But the granular stuff you can't see or count matters too, especially once you're making progress. OK, I get it. But then I thought some more... Toxins accumulate in the fat. So, if you eat animal-based foods (especially the fattier ones) and are looking to limit (or eliminate) that awful toxic stuff, farming practices matter. Like a lot! So, unsurprisingly, I went into research mode. Here's what I learned. Which toxins accumulate in fat and why? Not all toxins accumulate in fat. Some are stored in bone, muscle, organs, etc. But, there are certain toxins that a body stores specifically in fat. They include: Dioxins and furans (PCDDs/PCDFs) - These are persistent pollutants, resistant to breakdown, that are generally creating by burning things like plastic and chemicals and garbage. They can also be created as byproducts of industrial processes.PCBs - That's short for polychlorinated biphenyls, which are synthetic chemicals that were used to make various consumer products, from paint to glues to lubricants to coolants to batteries. They were banned in 1979, but because of their inability to breakdown, they remain as toxins in our environment.Pesticides & Herbicides - This includes previously banned pesticides (like DDT) that are still present in our environment. This also includes pesticides used today, like organochlorine and organophosphate pesticides. Certain Toxic Heavy Metals - Mercury, lead, cadmium, and aluminum are known for accumulating in fat. The reason the above toxins collect specifically fat (AKA adipose tissue) is because they are lipophilic. Liophilic is when a substance is "fat loving" and can bond with or dissolve in fat. Other toxins are hydrophilic, meaning they are "water loving" and can bond with and dissolve in water. These include bentazone, glyphosate, imidacloprid, flouride, and arsenic. They do not accumulate in fat. What can an overload of toxins do to your body? I like to think about toxic overload like a cup. Our bodies can process a little of it. But, when the cup is overfilled with stuff like pesticides, toxic heavy metals, mold, carcinogens, etc, that's when problems happen. Our bodies are pretty good at handling stress. That's why toxic overload can be confusing. It may take a long time - months, years, or decades - for the problem to arise. Then, once the problem happens, it's hard to pinpoint the cause. And then, healing time is often lengthy (and sometimes the damage can't completely be undone). When it comes to toxins, the response really depends on the body. The list of issues that can arise is exhaustive. They include fatigue, headaches, digestive problems and leaky gut, brain fog, anxiety and depression, increased risk of cancer, cardiovascular disease, hormone imbalance, mast cell overreaction, histamine responses, bloating and inflammation, trouble sleeping, skin conditions, liver damage, obesity, and more. Where can toxins in animal-based foods come from? When it comes to farming, there are few places that toxins can be introduced to animals. This can be from toxins resistant to breaking down from decades ago or toxins being used or produced today. This can be on the actual farms or in the facilities that prepare food for sale: Air: Toxins can vaporize and float in the air. Animals can breathe it in or it can settle on top of soil or water. Water: This is especially true with city water, which often has chemicals added to it or may run through old pipes. But, as we all know, water pollution varies from area to area.Soil: This can come from the local area or a non-farming activity that happened on the land previously. This can also be from past farming practices or current ones. Slaughter and butchering: Did you know an antimicrobial is required by the USDA when processing meat? Processors can choose harsh chemicals like bleach or opt for more natural ones like citric or lactic acids or vinegar.Recipes: Think beef jerky or lunchmeat. They have ingredients. First off, anything that's less than 1% doesn't need to be listed on the package. And then, of course, there's the hidden stuff depending on the quality of the ingredient.Packaging: Even what our food comes in can leach chemicals into our food. I mean, think about microplastics in bottled water! When toxins enter your food, you can't see them. You can't taste them. You can't smell them. This is why knowing more about how your food is produced is important. How can farming practices decrease the levels of toxins? Well, there are bunch of ways toxins can get into food from farming. Here are some ways that farms can decrease toxins in the final food: Choose A Clean Location: If a farm is located right next to or downstream from a factory or city, toxin levels will likely increase. Farms should ideally be far from cities or factories. Have Clean Water: If contamination is persistent in your area, you'll likely know it. And, you can always test the water, too.Improve Soil Health With Regenerative Farming: When soil is dead and unhealthy, toxins break down at their normal speed. But, with regenerative farming that creates robust microbiology, toxins can break down faster.Fertilize Naturally: There are plenty of chemical fertilizers out there. But, compost and manure from natural chemical-free sources are just as good… if not better.Limit, Eliminate, Be Considerate With Pesticide And Herbicide Use: A grand majority of farms still use pesticides and herbicides regularly. Yeesh. Even the organic ones can contain yucky stuff. With things like fruit, it's kinda necessary to some extent. But, especially with pasture raised animals, they're simply not needed (even though some farms still choose it).Choose Naturally Formulated Feed: This is the idea of the ingredients in the ingredients. You can have the most pristine land, air, and water, raising beef. But, if you feed them GMO corn sprayed with glyphosate and grown in contaminated soil... well... those toxins are introduced. Farms can make sure they're feed ingredients are pure and the sources the ingredients come from are chemical-free.Eliminate Vaccines: Yup, vaccines contain toxins. And especially when injected, they can harbor themselves in fat. Aluminum is a common ingredient in vaccines. And, did you know that animal vaccines can contain Thimerosal (AKA mercury)? That's been banned in human vaccines. When animals are raised outdoors and to be naturally happy and healthy, vaccines aren't necessary.Be Mindful With Anyone Who Processes Your Food: This can be a challenge, especially if you're in an area with more conventional farms. Farms can ask the hard questions and ask for changes like what antimicrobials are used (apple cider vinegar is allowed by the USDA), what the ingredients are, and where the ingredients are sourced from. At Miller's Bio Farm, we try to reduce your toxic intake as much as possible. Here's a few notable things we do (among the many): All of our small farms are 60+ miles from any major city.Our pastures are never sprayed with pesticides or herbicides. We love the biodiversity!Our pastures are fertilized with manure and more manure!Our farms that raise our animals regenerate their soil year after year. The idea is to improve the quality of the soil, and that includes the microbes that can help break down toxins.Clean well water is used for the animals to drink and for processing our meat and all of our products. Our beef, pork, and lamb are washed with organic apple cider vinegar. Our chicken is air chilled. Our turkey is washed with water and only water.None of our animals are fed corn or soy. And, our feed is chemical-free.Our farmers do not vaccinate their animals. Our chicken and turkey and lamb is 100% vaccine free. The only way a vaccine could be given to a cow or pig is if the animal was bought in and previously vaccinated. We make sure that no animal has received an mRNA vaccine. None of our products have yucky stuff like nitrates/nitrites, additives, fillers, etc. It's simple natural food. We always vet our processors before working with them to make sure they're up to our natural standards. We'd love to supply you with clean foods and hope you join the movement! Do you eat a lot of fat? Whether you do or not, what toxins make you most worried? I'd love to hear from you. Comment below or contact us 😊 ----- References: Carnivore Diet Macros and How to Achieve ThemAdipose Tissue as a Site of Toxin Accumulation Pesticide residues in animal-derived food: Current state and perspectives Impact of pesticide exposure on adipose tissue development and function10 Powerful Nutrients Found Only in Meat

Our bone broth tested A+++ for heavy metals 🥳 NATURAL AND CLEAN

My first question was --- Is there an issue with toxic metals in bone broth? As it turns out, yes, there "can" be an issue!

And that led me to my second question --- Should I be concerned about every bone broth? Where is the fear coming from? Well... it seems it might be a little political.

Regardless of whether the fear was fabricated or legit, we tested our bone broth anyway. After all, it's always nice to validate that your food choices are as clean as you think.

The results are in! Our bone broth tested A+++ for arsenic, cadmium, lead, and mercury.

These results are excellent. It means the broth definitely isn't overloaded with toxic heavy metals and are within safe levels.

You might be thinking what I first thought -- "But wait, you got a reading above 4.0 μg/kg for arsenic. Isn't that bad?"

Let's dive in -- What's up with arsenic?

Now, let's compare our results to food in general. Ours are extremely low.

Are you satisfied with our heavy metal results? Do you think we should take further action? Should we test other products?

Do you worry about toxic metals (or other junk) in your food? Where have your fears stemmed from?

More from the blog

Warning: Fat Holds Toxins. Carnivore and keto folks should watch out.

Does varying yolk color affect the flavor of honest eggs?

See a volcano of pickles! The pluses and minuses of natural ferments.

Do

Learn

Uphold

Connect

Miller's Bio Farm, 523 Valley Road, Quarryville, PA 17566