Proposition 65 Warnings in Food: Avoid These Chemicals

Grocery store aisle, showing shelves of processed foods in colorful packages on the left and right, with dairy coolers at the back. — Photo by Franki Chamaki on Unsplash.

Food should never have a Proposition 65 warning on it. However, some foods do have these warnings, so we should avoid them. According to the Environmental Working Group (EWG), “more than 10,000 food additives are allowed for use in food sold in the U.S.” Many of these additives are preservatives, while others are used for color, shine, or stabilization of artificial flavors.¹

Following is a list of the types of substances to avoid. Remember, all the substances listed cause cancer, developmental problems in children, or reproductive issues.

Acrylamides

French fries on brown paper with a container of ketchup and parsley sprinkled across. — Photo by Pixzolo Photography on Unsplash.

Acrylamides form in french fries, potato chips, other fried and baked snack foods, roasted asparagus, canned sweet potatoes and pumpkin, canned black olives, roasted nuts, roasted grain-based coffee substitutes, prune juice, breakfast cereals, crackers, some cookies, bread crusts, and toast. It is a chemical formed during cooking or processing at high temperatures (frying, roasting, grilling, baking) since it converts sugars and other naturally occurring substances in these foods to acrylamide. Boiling and steaming foods do not create acrylamides.²

“When you fry or cook potatoes and certain other foods at high temps, a substance called acrylamide forms through a chemical reaction between the sugars and amino acids. An analysis of 32 studies found that among non-smokers, dietary acrylamide consumption was associated with an increase in endometrial and ovarian cancers. It’s what makes potato chips and french fries taste so damn good. But…is it worth the danger?” -Darin Olien, Fatal Conveniences³

Arsenic

Rice, rice cereal, some edible seaweeds, seafood, poultry, and mushrooms can absorb arsenic from the environment. According to the Food and Drug Administration, “arsenic levels are higher in certain soils and rocks and where arsenic-containing pesticides were once used on food crops or from the current use of those pesticides on non-food crops, and pollution from mining, fracking, and coal-fired power plants.”⁴ The World Health Organization (WHO) states that the main source of arsenic contamination is polluted groundwater used for drinking, crop irrigation, and food preparation.⁵ Chronic arsenic poisoning often leads to cancer.

BPA (Bisphenol A)

Blue tub of cans of Coca Cola, Diet Coke, and bottled water on ice. — Image by Kenny Holmes from Pixabay.

BPA (Bisphenol A) is a chemical that manufacturers use in plastic linings in cans (both the type for vegetables and beverages), jar lids, polycarbonate plastic bottles (#7 resin code), and bottle caps. It leaches into food. It is an endocrine disruptor and has been linked to developmental and health problems in children (such as Attention Deficit Hyperactive Disorder (ADHD)); anxiety and depression; early puberty in girls; diabetes; obesity; and heart disease.⁶

BHA (Butylated Hydroxyanisole)

Plate of charcuteries and cured meats such as salami and prosciutto, with cheese and pickled vegetables. Two silver forks at left. — Image by Gabriele from Pixabay.

BHA is a preservative used in cured and preserved meats and other foods. The substance is also found in certain rubber, plastics, and glues. Both the National Toxicology Program and the International Agency for Research on Cancer list it as a suspected carcinogen. Further, “the European Union classifies BHA as an endocrine disruptor because of its ability to lower testosterone and thyroid-hormone thyroxine.”⁷

BHT (Butylated Hydroxytoluene)

Red box of Cap'n Crunch cereal with the Captain eating a bowl of the cereal on the box design.

BHT is a preservative used in cereals like Cap’n Crunch and Apple Jacks. It causes hormone disruption and harms the reproductive system. The European Food Safety Authority indicated that it may disrupt endocrine function by causing thyroid changes and affecting development.⁸

Cadmium

Cadmium is in certain fish, shellfish, organ meats, mushrooms, oats, root crops, and some leafy vegetables grown in cadmium-rich soils.⁹ A study from 2023 found that age groups 6–24 months and 24–60 months old were the most exposed to cadmium in foods. “American infants and young children of these age groups who regularly consumed rice, spinach, oats, barley, potatoes, and wheat had mean [cadmium] exposures exceeding maximum tolerable intake level was set by the Agency for Toxic Substances and Disease Registry (ATSDR).”¹⁰ It can cause renal failure and is a human carcinogen.

Flame Retardants

Flame retardants, particularly PBDEs (Polybrominated Diphenyl Ethers), are known carcinogens that can also cause brain defects and hormone interference. These harmful chemicals are found in some farm-raised fish. Additionally, similar chemicals are used in certain ovenproof or microwavable plastic trays and plastic water bottles, which can lead to the leaching of chemicals into food and beverages. Several studies have documented the migration of chemicals from food packaging to food.

Lead

Theo Chocolate bar packaging — Many brands of chocolate, even organic, have high levels of lead and cadmium.

Lead is found in certain dietary supplements, balsamic vinegars, and imported spices such as turmeric and chili. Lead, along with cadmium, is also found in many types of chocolate. Exposure to lead is particularly harmful to children’s development, causing issues with hearing, speech, brain and nervous system damage, slowed growth, and learning and behavioral problems.¹¹

Mercury

Seafood counter, many types of seafood on a counter of ice. — Photo by Jonathan Noack on Unsplash.

Mercury is in many types of fish: king mackerel, shark, tilefish (from the Gulf of Mexico), swordfish, marlin, bigeye tuna, bluefin tuna, and orange roughy. Nearly all fish and shellfish contain traces of mercury, but the largest fish accumulate the most in their bodies. Mercury causes neurological and behavioral disorders such as tremors, insomnia, memory loss, neuromuscular effects, headaches, and cognitive and motor dysfunctions.¹² Refer to Monterey Bay Aquarium’s Seafood Watch for the safest seafood, linked under Additional Resources.

Phthalates

Phthalates are chemicals in plastics that can leach into food and beverages, especially when heated. They have been found in dairy products, meats, seafood, fruits and vegetables, and fast foods.¹³ Phthalates are hormone-disrupting chemicals that have been linked to many reproductive, developmental, and endocrine-related health problems.

PFAS (polyfluoroalkyl substances)

When waterways or environments are contaminated with PFAS, also known as “Forever Chemicals,” they can contaminate the food supply through plants and animals that are grown, raised, or processed in those polluted areas. Additionally, PFAS can migrate into foods through food packaging, certain types of take-out containers, food processing, and Teflon or nonstick cookware. This chemical family (PFAS, PFOA, PFC, etc.) can lead to issues such as altered metabolism and body weight regulation, increased risk of childhood obesity, reduced immune system function, and cancer.¹⁴

Potassium Bromate

Potassium bromate is added to the flour of many packaged noodles, baked goods, bread, tortillas, and other foods made with flour.¹⁵ It is a possible human carcinogen according to the International Agency for Research on Cancer. Multiple countries have banned it, including the United Kingdom, Canada, Brazil, and the European Union – but not the United States. The substance is also used in industrial cleaning agents, bombs, and photo-developing solutions.¹⁶

Propyl Parabens

Stack of flour tortillas on a cloth napkin, and a fork and spoon at left. — Image by Martin Diaz from Pixabay.

Propyl parabens are a preservative in processed foods like pastries and tortillas. But they’re also found in batteries, floor cleaner, and glue. When present in food, this chemical acts as an endocrine disruptor and can lead to developmental and reproductive harm.¹⁷

Styrene

Styrene and benzene from “Styrofoam” polystyrene take-out packaging can leach into food and beverages, especially with hot or reheated foods. Styrene is a known carcinogen and exposure increases the risk of leukemia and lymphoma and is a neurotoxin. Benzene is also a known carcinogen. Avoid take-out containers by bringing your own metal or glass leftover containers.

Synthetic Food Dyes

Caucasian person's hand holding a red bag of Skittles. — Photo by Jonathan J. Castellon on Unsplash.

Manufacturers use synthetic food dyes in many foods and beverages. And especially candy! But these same colorants are also used in household cleaners, wood stains, pesticides, and even blue jeans. While not all food dyes are toxic and not all are on the Proposition 65 list, we know that certain dyes are carcinogenic. Others affect development and cause behavioral difficulties in children.¹⁸

Avoid Toxic Ingredients

Avoid the ingredients listed above, as they are the most toxic. If any food has a Proposition 65 warning, either put it back on the shelf or return it. No food should contain that type of warning.

Remember to avoid processed food as much as possible. Try to limit your consumption of seafood and meat, and minimize your use of food packaging. Processed foods include crackers, bread, canned goods, frozen or packaged meals, cereal, etc. In general, the less processed the food, the better it is for you. Always check the ingredients list. If it contains a chemical-sounding word or something you can’t pronounce, it’s best to avoid eating it.

I hope this helps! Thank you for reading, please share and subscribe!

“It’s better to pay the grocer than the doctor. And smarter to trust the farmer than the pharmacist.” -Darin Olien, Fatal Conveniences¹⁹

Additional Resource:

Website, Monterey Bay Aquarium Seafood Watch.

Footnotes:

Article, “Common food additives in Cap’n Crunch and Apple Jacks cereal may harm human health,” ewg.org, October 6, 2021. ↩︎
Page, “Acrylamide,” Proposition 65 website, Updated February 2019. ↩︎
Book, Fatal Conveniences: The Toxic Products and Harmful Habits That Are Making You Sick―and the Simple Changes That Will Save Your Health, by Darin Olien, Harper, New York, 2023. ↩︎
Page, “Arsenic in Food,” Food and Drug Administration, accessed September 16, 2024. ↩︎
Page, “Arsenic,” World Health Organization, December 7, 2022. ↩︎
Page, “Bisphenol-A (BPA)/Bisfenol A (el BPA),” Columbia University Mailman School of Public Health, accessed September 16, 2024. ↩︎
Article, “Common food additives in Cap’n Crunch and Apple Jacks cereal may harm human health,” ewg.org, October 6, 2021. ↩︎
Article, “Common food additives in Cap’n Crunch and Apple Jacks cereal may harm human health,” ewg.org, October 6, 2021. ↩︎
Page, “Foods,” Proposition 65 website, May 2021. ↩︎
Article, “Dietary exposure to cadmium from six common foods in the United States,” Food and Chemical Toxicology, Volume 178, August 2023. ↩︎
Page, “Lead Exposure Symptoms and Complications,” Centers for Disease Control and Prevention, April 10, 2024. ↩︎
Fact Sheet, “Mercury and health,” World Health Organization, March 31, 2017. ↩︎
Page, “Phthalates,” toxicfreefuture.org, accessed September 19, 2024. ↩︎
Page, “Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS),” National Institute of Environmental Health Sciences, update September 3, 2024. ↩︎
Page, “This cancer-causing chemical may be lurking in your bread,” ewg.org, May 4, 2022. ↩︎
Article, “From baguettes to bombs: Surprising industrial uses of common food chemicals,” ewg.org, June 6, 2024. ↩︎
Article, “From baguettes to bombs: Surprising industrial uses of common food chemicals,” ewg.org, June 6, 2024. ↩︎
Article, “From baguettes to bombs: Surprising industrial uses of common food chemicals,” ewg.org, June 6, 2024. ↩︎
Book, Fatal Conveniences: The Toxic Products and Harmful Habits That Are Making You Sick―and the Simple Changes That Will Save Your Health, by Darin Olien, Harper, New York, 2023. ↩︎

August 22, 2024August 31, 2024

What Is Proposition 65?

Last updated on August 31, 2024.

Proposition 65 warning label in English and Spanish, yellow triangle with exclamation point at left and orange Warning label on right above text.

Almost every time I see a Proposition 65 warning label on a product I’m considering purchasing, I don’t buy it. My spouse often asks, “Is it really a big deal?” I say, yes, it means the product has chemicals known in the State of California to cause cancer.

If they cause cancer in California, they cause cancer everywhere.

We’ve had friends over the years who had lived in California. When we asked about Proposition 65, they shrugged and indicated that California’s just ‘overly cautious.’ I quietly disagreed. I didn’t know enough to debate the matter. So I decided I’d learn about it.

Google terrain map screenshot of California and Nevada. — Courtesy of Google Maps.

“California tends to be the pioneer of protecting consumers from harmful chemicals in everyday products.” – Darin Olein, Fatal Conveniences¹

Cancer on the Rise

As I was writing this article, a new study came out indicating that Generation X and Millennials have a higher risk of getting certain types of cancer when compared to earlier generations. “Researchers from the American Cancer Society (ACS) studied 34 of the most common cancers. They found that cancer incidence rates continued to rise in progressively younger generations in 17 of the cancers, including breast, pancreatic, and gastric cancers.”²

While that study does not point to a cause, Generation X and Millenials have been exposed to far more chemicals than previous generations. We know many chemicals are linked to cancer,³ so overexposure to those chemicals is an obvious explanation.

Read on to learn how Proposition 65 warnings can help us.

Diamond shaped sign with skull and crossbones, "Poison", all black and white. — Image by Clker-Free-Vector-Images from Pixabay.

What is Proposition 65?

It is a right-to-know law. The California Office of Environmental Health Hazard Assessment (OEHHA), which administers the Proposition 65 program, defines it as such: “Proposition 65, officially known as the Safe Drinking Water and Toxic Enforcement Act of 1986…requires businesses to provide warnings to Californians about significant exposures to chemicals that cause cancer, birth defects or other reproductive harm.” These warnings can be in products, homes, workplaces, or the environment. It also protects the state’s drinking water sources from being contaminated with these chemicals.⁴

“A Proposition 65 warning is telling you that using a product or entering a location can expose you to a significant amount of a chemical that causes cancer, harmful effects on a developing baby, or other harmful effects on reproductive health.”⁵

What else does the legislation do?

Proposition 65 requires California to publish a list of these chemicals which must be updated annually. It includes over 1000 chemicals.⁶

For this list, California recognizes the International Agency for Research on Cancer (part of the World Health Organization), the U.S. National Toxicology Program, and the Environmental Protection Agency (EPA) as authorities on carcinogens. The State of California can also make its own determinations about specific substances. As the American Cancer Society notes, “This means that not every chemical on the list has been proven to the worldwide scientific community to actually cause cancer in people.”⁷

But, if certain chemicals are suspected of causing cancer in California, that’s good enough for me to avoid them.

The List

More than one thousand chemicals make a very long list. The Proposition 65 website has a page called “Fact Sheets” that lists chemical groups, rather than individual chemicals, making the risks easier to read and understand. However, it is not nearly as comprehensive so I recommend viewing both. I’ve linked them under Additional Resources below.

The list includes toxic substances such as lead, asbestos, and hexavalent chromium; industrial solvents; and toxins like carbon monoxide and tobacco smoke. It even includes BPA (Bisphenol A), a toxic substance used in plastic and metal can linings; as well as Styrene, used in many polystyrene take-out containers we incorrectly but commonly call Styrofoam.

White polystyrene container with food sitting open, against a white background. — Photo by Vitalis Arnoldus on Flickr, Creative commons license (CC BY 2.0).

Proposition 65 Labels

Product labels can be unclear as they only indicate if a product contains chemicals that may cause cancer or reproductive problems. They are required to list one specific chemical in the warning. However, they are not required to list every chemical, their amounts, or how a person may be exposed to them.

“By law, a warning must be given for listed chemicals unless exposure is low enough to pose no significant risk of cancer or is significantly below levels observed to cause birth defects or other reproductive harm.”⁸

Products Sold in Other States

Products sold outside of California are not required to have a warning label even if they contain those toxic chemicals. “Some companies that sell products all over the United States only label those sent to California, even though all their products contain the same compounds.”⁹ Online sellers to all states must include warnings on their products, such as those listed on Walmart, Amazon, Lowe’s, and others.

Changes Brought by Proposition 65

Many sources don’t find the Proposition 65 warnings helpful, including Wirecutter, the consumer product review arm of The New York Times. I’ve often found their reviews and recommendations helpful because they independently test and review many products. But even they say Proposition 65 isn’t a big deal to worry about because the labels don’t indicate the amount or methods of exposure. However, they do acknowledge that the law has brought change to a variety of consumer products. “Prop 65 has resulted in changes in product formulation to remove or reduce potentially harmful chemicals, including in things like Wite-out and herbicides. Awareness raised by Prop 65 led Coke to change its use of 4-MEI, a potential carcinogen found in some caramel coloring.”¹⁰

The law has successfully raised awareness. Here are some of other the changes it has helped with:

“Proposition 65 has helped reduce or eliminate the use of lead in a wide variety of products, including hair dye, toothpaste, ceramic ware, foil caps on wine bottles, children’s jewelry, and even some types of cookies and candy. Levels…with acrylamide levels in major brands of potato chips and french fries. Proposition 65 has also led to the removal of several chemicals harmful to the developing baby during pregnancy from many nail care products, and has encouraged manufacturers of paint strippers to develop alternatives that do not contain methylene chloride or NMP.”¹¹

Controversy

Others argue that Proposition 65 is overly cautious, while others believe it is too broad and meaningless. In fact, on a lot of forums, many people completely disregard the warnings. Some say they are on ‘everything in California;’ others indicate that they just don’t think it’s a big deal. One person wrote, “California puts that on literally everything, they’re idiots.” On another forum where someone asked why a golf towel has a Proposition 65 warning, another responded: “We live in an age where it wouldn’t be out of place to put a warning sign on a water bottle saying ‘could cause drowning.’ Don’t think anything of it.”¹²

But do think something of it. That golf towel likely has formaldehyde or PFAS in it, which are toxic. Why are harmful chemicals allowed in our products? The reason is that the amount in each item is often limited, making small amounts in products seem acceptable.

But here’s the thing.

If these chemicals were just in our couches or clothes or shampoo, it would be limited exposure. But they are in EVERYTHING. These chemicals are in our food, make-up, skin care products, shampoo, soap, clothing, furniture, carpeting, vinyl flooring, mattresses, bedding, drinking water, household cleaning products, cookware, vehicles, pharmaceuticals, hair dye, take-out containers, drapery, building materials including windows and blinds, plastic food containers and packaging, camping tents, shower curtains, electrical items…etc. We are surrounded by these toxins in our homes, in our showers, in the workplace, and in our schools. If we encountered a single chemical occasionally, it likely would not pose a significant threat.

But we are constantly bombarded with these chemicals in every facet of our lives. We are inundated with these chemicals and cumulatively, it harms us. This raises our chances for reproductive and developmental problems, cancer, and other health issues such as rashes, headaches, and allergies. This is likely why cancer is on the rise.

Graphic illustration of a woman doing yoga, surrounded by bottles of a product, yoga mat, towel, plants, and cup of tea. — Image by Евгения from Pixabay.

Protecting Our Health

We are poisoning ourselves with these toxins. As consumers, we must avoid them whenever possible to protect our health. Let’s refuse to purchase items that contain these harmful chemicals. This collective action will drive companies to make necessary changes.

I hope this information helped! Please check out my next article about products with Proposition 65 warnings. Thank you for reading, please share and subscribe.

Additional Resources:

List, “Proposition 65 List of Carcinogens or Reproductive Toxicants,” Office of Environmental Health Hazard Assessment (OEHHA), State of California, December 29, 2023.

“Fact Sheets,” Proposition 65 website.

Article, “Prop 65 was meant to protect residents from toxic water. How did warning stickers end up on everything?” Vox.com, updated October 31, 2019.

Footnotes: