Originally written in December of 2013 [updated November of 2021]…
but all these years later, still almost nothing has changed since then!]
I first learned of the concern for Lead in chocolate shortly after my children were poisoned – when the Dagoba organic dark chocolate Lead-contamination recall happened in April of 2006. This recall happened just 6 months after I found out about my boys’ poisoning, and – as a result – I was definitely paying attention to all the news about Lead at the time! Here are some links about that, if you hadn’t heard about this before and you want to read more: (link one); (link two); (link three).
Lead-in-chocolate shedding light on ALL manufacturing…
This incident had such a profound impact on my understanding of the complexity, depth and breadth of Lead contamination in our lives — especially given Dagoba was a local (Ashland, Oregon-based) company that manufactured expensive, ostensibly high-quality Organic products that were available every day in my neighborhood natural foods grocery store.
Learning the story of how Lead got into my chocolate (and how chocolate was virtually unregulated at the time) shaped my understanding of Lead contamination in manufactured food products — and marked the beginning of my exploration of the issue of Lead in manufactured goods in general.
This issue was so important (and is such a personal concern to so many other parents – and women especially) that I decided to include a scene about it in my documentary film, MisLEAD: America’s Secret Epidemic. I felt others would find the story of Lead in chocolate equally fascinating — a cautionary tale, shedding light on who we trust (when it comes to feeding, housing and clothing our families) and why we trust them, and what we can expect (vs. what we should expect) from the companies whose products we allow into our lives and our bodies.
In one of my favorite scenes in the film, my friend Ronnie (a scientist) talks about lead in chocolate and wine:
“The really bad news is, chocolate is the food item with the most Lead in it!” says Ronnie Levin (research scientist, Harvard professor and retired EPA employee), in MisLEAD: America’s Secret Epidemic
In the film, Levin goes on to explain that when one industry – the California wine industry – was faced with a challenge by the State of California to either remove the Lead from their wine or to label their product as “toxic”, they were able to quickly mobilize and take the necessary actions to bring the Lead-levels in California wine down by 300 parts per billion (quite a lot for a food item—Lead in food & beverages is measured in parts per billion (ppb), with water considered toxic at levels as low as 1 ppb.)
The intention behind the scene in my film is not to single out or demonize chocolate (or wine), but to let the comparative stories of Lead-in-chocolate and Lead-in-wine — stories highlighting the different regulatory standards [or complete lack thereof] in separate segments of the food industry — serve as an example for other industries (an example of the importance and potential impact of consumer demand for corporate accountability when it comes to the presence of toxicants in products – including food).
Unfortunately, no public agency (not even the FDA, the CDC or the EPA) has ever challenged the candy or chocolate industry as a whole with a similar challenge to that demanded of the California wine industry [when this was originally written, as of 12/2013] and chocolate and candy are not well-regulated for toxicants (nor are they even regularly tested by independent agencies) in the same way some other products are.*
This issue is compounded by the fact that chocolate is a highly processed food – and so Lead has the potential to get added as a trace contaminant of the manufacturing process to chocolate, as well as to each of its ingredients separately, at the many stages and steps along the way…
How does Lead (& Cadmium) end up in Chocolate?
- Leaded gasoline is still used in many of the countries where chocolate ingredients are grown (and in fact – when specifically used in farm vehicles, Leaded gasoline is often exempt from laws restricting its use, even in countries where it is otherwise prohibited!)
- The husk of the cocoa bean has been shown to be a very effective “tool” in terms of its ability to absorb Lead (it’s absorbent, like a sponge) from polluted air and soil [from continuous emissions and deposits of Leaded exhaust and deteriorating Lead paint from tractors and other vehicles, and generators and other equipment, Lead-painted machinery & buildings, etc.].
- Transport packaging (industry reusable, labeled canvas bags, cartons and crates) may be painted or treated with Lead- and Cadmium-containing coatings (there is nothing regulating that).
- Shipping containers (the ones the size of train cars) and container-ships used for international transport may be legally painted with Lead-based paint, and also often with red or orange Cadmium-based pigments. Even in the U.S., what is historically known as “Lead paint”, from a regulatory standpoint, has only been fully outlawed for “residential use” and is 100% legal for industrial uses. [I actually – recently (in California in 2019) – tested a fairly-new shipping container that was being used for storage in the driveway of the home of a Lead-poisoned child, and the paint was positive for Lead with readings in the 7,000 to 10,000 ppm range.]
- Equipment & machines for grinding and processing food (at every step of the process) may have both Leaded components that, as they wear, cause traces of Lead to be mixed into the food product that they are processing AND Cadmium-plated components (with the Cadmium-plating used on metal machine components to help prevent corrosion from moisture.)
- Not every batch of imported food ingredient (cocoa beans, sugar, cocoa butter, etc.) is tested for toxicants (only random, spot testing is done by manufactures who voluntarily opt to watch for this sort of thing.)
Simply put, as a general rule, the more processed a chocolate item is, the more Lead (& Cadmium) it has in it.
So, Tamara – what do you do? Do you eat chocolate?
- I personally ALWAYS avoid transnational conglomerate brands (like Nestle’s or Hershey’s).
- I try to stick with Organic and local, small-batch manufacturers [and as you can see from the above-referenced Dagoba recall, even buying Organic and local doesn’t necessarily solve the problem!]
- I buy minimally-processed ingredients – like raw Cacao [you can read more about that here] and often make my own chocolate treats.
- My main defense: I limit my consumption of processed chocolate bars and stick with Organic cacao or cocoa powder and roasted cocoa nibs, from local companies that I trust [a shout out to People’s Coop, here in Portland!].
What about “Fair-Trade Certified” Organic chocolate products?
One thing I have personally chosen to avoid [based solely on my own theoretical musings, not on any particular study I have read]: Chocolate that is processed in third-world countries (often marketed as “Fair-Trade Certifed”** – as an economic stimulus activity (to support local farmers, etc.)) This type of marketing and labeling on products actually raises quite a few alarm bells for me.
The main reason I avoid these products, is because of what the phrases like “Fair Trade Certified” and “Small Family Farms” can imply (correlate to) – in a manufacturing context. Commonly, the processing equipment in these third-world countries (on these “Fair Trade-Certified” small family farms) is less likely to be modern, high-tech stainless steel, contaminant free, state-of-the-art equipment; work-flows and supply chains at this level are also typically not necessarily reflective of best practices for the stringent avoidance of (and measurement/monitoring of) toxicants-contamination.
Small family farms in third world countries (really anywhere other than Europe and the United States) are much more likely to use “legacy” equipment that has one or more of the following characteristics:
- it is older (often antiquated and with well worn components and coatings)
- it is made of recycled components (sometimes from equipment not intended for food processing applications)
- it is re-furbished
- it is re-purposed
- or it is re-used…
- it is painted with industrial Lead-based paint
- it is coated with Cadmium-based plating to avoid corrosion
- it integrates many Leaded brass components (often in contact with or in close proximity to the food), brass which can also contain Cadmium, Antimony, Arsenic and other toxic metals
… and all this (usually) is pitched/spun by marketing departments and sales teams as something positive – with the related messaging including emotionally-alluring narratives that this legacy (toxic) equipment and workflow is somehow beneficial – contributing to the positive “sustainable” qualities of that particular farm.
Don’t get me wrong – in general, I am very pro-sustainability (I started working with pioneers in the sustainability movement on various projects back in 1991/1992, before it was an overused phrase appearing in ad copy for almost anything that can be sold), however when it comes to food processing it’s just a fact: older equipment is more likely to have components made of Lead or Leaded brass or painted with high-Lead or high-Cadmium content paint or with Cadmium plating (which is not outlawed in many of these countries where cocoa is grown.)
Why do they use Leaded brass in these machines?
Leaded brass components are actually still intentionally used in many types of processing equipment and in machines used every day across countless industries (including here in the United States where we ostensibly have better regulatory standards) — due to the “easy machinability” and the “self-lubricating” properties of “red” (i.e. Leaded) brass (these components make it possible for moving parts to actually move!)
“Self-lubrication” is a well-known quality of brass that makes the machine movements function better and inexpensively maintain working tolerances over time, but inherent in the benefit of using brass in moving components is that this function (the ease with which brass components move in a machine) is also what causes them to wear more quickly than components made of other, harder metals (in fact “sacrificial” is the technical industry term to describe these replaceable brass parts – often used at points of high friction and rapid wear).
Why is Leaded brass a problem in machines used for food processing?
In food processing equipment where does the part that wears off of those components (the paint or the brass) go over years of use?
- The worn bits (the invisible particulates that come off with use of the machine) often wear right into the food manufactured or processed by that machine.
- The more processed a food is (the more machines it goes through) – especially noting the degree to which cocoa products may be heavily processed outside of the U.S. – the more likely it is for that product to have Lead added to it at every step along the way.
- Chocolate is one of the most heavily-processed foods.
Remember – it just takes a literally microscopic amount of Lead to poison a child, and Lead-poisoning causes permanent brain damage, learning disabilities, behavioral disorders, and life-long health challenges.
Some additional reading / examples to illustrate the concerns mentioned in this post:
While I don’t have a lot of examples here on this website for machines I have tested there is one such example in the links below. I have also linked several examples of brass objects with varying levels of contaminants to illustrate the concern. Another category of posts here that might be helpful in showing the level of potential contamination from equipment and machinery is the “tools” category. Here’s a link to that entire category to explore – many of these tools were found in my husband’s workshop and are either painted with Lead paint or have other types of heavy metal contamination.
- Here’s an example of high-Lead brass with Antimony – link
- Here’s an example of modern brass with Cadmium, Lead and Antimony – link
- Here’s an example of modern brass with extremely high levels of Cadmium (+ Antimony & Lead) – link
- Here’s an example of a modern machine (in my husband’s workshop) that has many brass components positive for a high level of Lead (and also Cadmium) – link
- This post discusses the concern for Lead in processed baby food (and also has a picture of a coffee roasting machine, showing painted and brass components) – link
While the tiny amount of Lead in one particular chocolate bar might not be especially concerning in itself, it is our aggregate cumulative body burden of environmental toxicants (specifically heavy metals – like Lead, Cadmium, Arsenic, Mercury and Antimony) that we do need to keep an eye on. And it is that aggregate cumulative exposure that is causing [or contributing to] long-term health impacts like heart disease, kidney disease, osteoporosis, accelerated cognitive decline / early-onset Alzheimer’s, and more. The only way to keep an eye on this sort of thing as consumers is to be aware of what we are putting into our bodies.
Thanks for reading.
If you appreciate my work and the information I share, please consider making even a small monthly contribution via my “subscribe” link, to help me be able to continue to help other families, by protecting their children from lead in their homes, schools and environment.
As always, please let me know if you have any questions.
*New European standards and limits for Cadmium in chocolate were implemented just recently, in 2015. Chocolate manufacturers were given four years to comply (with full compliance required no later than January 1, 2019). Link to site with EU Cadmium standards for chocolate here.
**Note – I also appreciate genuine “Fair Trade” practices, but I think we need to examine these “Fair Trade” relationships and ask the U.S. companies that are the stewards of these relationships to make sure that protecting consumers from environmental toxicity (as well as protecting workers from toxicant exposure in the workplace) is at the top of their list of priorities (regardless of the environmental regulations [or lack thereof] in the countries with the industries and farming they are supporting.)
Great post and horrifying. Can you elaborate on the shipping container information you have above? For the sacks that the cocoa is transported in, are there studies showing they have lead in them? Same for the shipping containers painted with lead – are there reports showing this info? Curious to learn more… Thanks!
lynn hasselberger says
Just happened to be eating dark chocolate when I stumbled upon this. Ack!
HAHAHAHAHA! – Thanks for reading and sharing Lynn!
This is so interesting, Tamara. I’m very pro fair trade, but I hadn’t thought about this side of the argument. Food for thought–pun intended.
Hi Rachel! I am very “pro-Fair Trade” too, I just try to buy food items that are grown as a Fair-Trade item, but processed locally (if they are processed at all.) So sourcing Fair-Trade ingredients I think is a good thing. I edited the post, revising the language to better articulate my position on that since you read it – and I think we really need to call on our “Fair Trade” industry sponsors (the companies buying and selling the Fair Trade products in the U.S. markets) to incorporate meaningful initiatives to reduce/eliminate sources of environmental toxicity. Unfortunately I don’t think it is high up on the list for some of them, as it is a bit of a blind-spot, just as many “Green Builders” are thinking about longevity and energy savings—but not enough about environmental toxicity and end up doing stupid things like integrating old/reused/re-purposed building components into their new “Green” structures and those components are often either covered in lead-paint or have enough lead-residue on them (folks don’t realize that lead residue is virtually impossible to remove from the grain of even professionally chemically stripped wood for instance!) to create a continuing dust hazard. We are all doing so much, but there is also so much room for growth & increased awareness, understanding and an ever more expansive/enlightened sense of responsible stewardship.
So have you found any brands that you feel comfortable with? I love chocolate and just trying to find it organic and without soy & dairy is a feat in itself…let alone adding heavy metals to the list 🙁
any recommendations yet?
I would also like to know any recommendations for buying chocolate.
kimberly berghauer says
Can I gift this product to you for testing? Thank you for your help 🙂
David Jackson says
It’s great to see these posts on metals in food. For many people, I think food is the primary source of lead exposure now days. Chocolate is a problem…according to the FDA study, a 1.5 ounce chocolate bar has .47 micrograms of lead in it. But that’s milk chocolate…dark chocolate will have more than that. Of the 300 food items the FDA tested, chocolate was the 7th worst. The foods that contained even more lead were 1) chocolate syrup, 2) Baby Food Sweet Potatoes (ya, baby food) 3) Canned peaches 4) Canned Sweet potatoes 5) Canned apricots 6) Baby food arrowroot cookies. So 2 of the top 7 worst foods for lead were baby food. Of the top 25 worst foods for lead, 9 were baby food (mostly juices).
Hi Tamara! You are amazing and I am so grateful that I stumbled upon your website. Thank you for your work!!!!! I have a question unrelated to chocolate, so I hope this is ok. It’s concerning older homes . . . A family member lives in an older home that was partially remodeled about a year ago. I have not visited with my 6 (soon to be 7 year old) year old due to my worries concerning toxic lead dust. I am taking some heat that I have not visited and am receiving requests to spend some holiday time there. Am I right in avoiding the home? Should all pre-1978 homes be avoided or can they be safe? I do not want to go to the house, then learn later that I put my kiddo in a harmful situation. Can you shed some light on the safety of older homes? Can they ever be safe or should I completely avoid the house? Thanks SO much for your input!
Hi Jenny, did you watch the film yet? Your questions are answered to a significant degree there:
Here’s a post that might be helpful in conveying the concern: https://tamararubin.com/2019/03/the-sugar-packet-analogy-how-much-lead-dust-does-it-take-to-poison-a-child/
Houses need clearance testing to be sure they are safe for children (after any work is done): https://tamararubin.com/home-testing/
Thank you SO much for responding! You rock!
I found this site that reports lead and cadmium levels in lots of different chocolate brands.
Great link for people to search their chocolate brand to see if it has lead or cadmium in it.
Though I’d assume the levels could be variable with each batch.
This is STILL happening!! https://www.foodsafetynews.com/2022/12/heavy-metals-make-healthy-dark-chocolate-more-problematic-than-thought/?utm_source=Food+Safety+News&utm_campaign=f4e7be0e2a-RSS_EMAIL_CAMPAIGN&utm_medium=email&utm_term=0_f46cc10150-f4e7be0e2a-40538747
When it comes to cacao, the beans are farmed, fermented and roasted in country, but are processed into chocolate products in the west. Since chocolate requires a lot of processing, it’s a complicated supply chain to examine. But I would say that chocolate bars are not being made in the bean’s country of origin. The beans are bought from producers and collectives of producers on the international market and exported to the confectionary factory to be made into the final products.
Vicki stevens says
Do you know anything about Lindt chocolate? I enjoy their 95% dark chocolate, everything else is too sweet.
Thank you for your in depth research about one of my families favorite foods. I thought the organic cocoa and cocoa nibs were fine to use but now I would like to be sure. A family member has already had brain lesions from mold and my mother has had a stroke so, I would like to keep our food and environment as healthy as possible!
Do you know abut the brand Navitas cocoa and cocoa nibs? Do you know if Lily’s Dark Chocolate baking chips are safe?
Thank you so much!
Lilly’s tested high in lead by Consumer Reports recently. I’m not sure about Nativa.