Heavy Metals in Girl Scout Cookies: What You Need to Know

A 2024 report from Consumer Reports detected measurable levels of four heavy metals—arsenic, cadmium, lead, and mercury—in samples of Girl Scout Cookies. The amounts found are low enough that eating a few cookies occasionally does not pose a health risk for most people. The concern is more about long-term, repeated exposure, especially for young children who might eat these cookies regularly over many years.

What the Tests Found

Consumer Reports tested 28 samples of seven popular Girl Scout Cookie varieties, including Thin Mints, Samoas, and Tagalongs. The lab found measurable levels of all four metals in nearly every sample. The highest concentrations were for cadmium and lead, while arsenic and mercury appeared at lower levels.

For example, one serving of Thin Mints (about four cookies) contained roughly 0.5 micrograms of lead and 1.2 micrograms of cadmium. These numbers are well below the daily limits that federal agencies consider safe for occasional consumption. The U.S. Food and Drug Administration FDA has set a maximum daily intake for lead of 12.5 micrograms for children, and the Environmental Protection Agency EPA has established a reference dose for cadmium of about 1 microgram per kilogram of body weight per day.

The report did not find any samples that exceeded federal safety thresholds on their own. The concern is cumulative—if a child eats multiple servings of cookies along with other foods that contain these metals, the total daily intake could approach or exceed safe levels.

Where Do the Metals Come From?

Heavy metals are naturally present in soil and water, and they can be absorbed by plants as they grow. Cocoa, which is used in many Girl Scout Cookies for chocolate coatings or fillings, is known to accumulate cadmium from soil. Wheat and oats, which form the base of most cookies, can take up lead and arsenic from the environment.

Agricultural practices also play a role. Some fertilizers and pesticides contain trace amounts of heavy metals. Irrigation water can carry contaminants from industrial runoff or old mining sites. The metals then move from the soil into the crop and eventually into the finished food product.

Girl Scout Cookies are produced by two licensed bakers: ABC Bakers (based in Virginia) and Little Brownie Bakers (based in Kentucky). Both companies source ingredients from multiple suppliers across different regions, which means the metal content can vary from batch to batch depending on where the wheat, cocoa, and other ingredients were grown.

Health Risks of Heavy Metal Exposure

Heavy metals are toxic to the human body even at low levels, especially for children and pregnant women. Lead can affect brain development, reduce IQ, and cause behavioral problems. Cadmium is known to damage the kidneys and weaken bones over time. Arsenic is classified as a human carcinogen, and mercury can harm the nervous system.

The FDA and EPA have set reference doses and tolerable intake levels for these metals. These are estimates of the amount a person can consume daily over a lifetime without a significant risk of harm. For lead, the FDA has set a maximum daily intake of 12.5 micrograms for children and 25 micrograms for adults. For cadmium, the EPA’s reference dose is 1 microgram per kilogram of body weight per day. That means a 50-pound child (about 23 kilograms) could safely consume up to 23 micrograms of cadmium per day.

A single serving of Girl Scout Cookies provides only a small fraction of these limits. The risk comes from eating multiple servings of cookies plus other foods that also contain heavy metals, such as rice, spinach, and chocolate. Over years of regular consumption, the cumulative exposure could reach levels that cause concern.

How Girl Scout Cookies Compare to Other Foods

The levels of heavy metals in Girl Scout Cookies are similar to those found in many other common snack foods. Consumer Reports has tested dark chocolate, rice cakes, and protein bars and found comparable or higher concentrations of lead and cadmium. Dark chocolate, in particular, often contains more cadmium than cookies because cocoa beans absorb the metal from soil more efficiently.

For context, a single ounce of dark chocolate (about two squares) can contain 2 to 5 micrograms of lead and 3 to 8 micrograms of cadmium. A serving of rice cakes might contain 1 to 3 micrograms of arsenic. The amounts in Girl Scout Cookies fall within this same range.

The key difference is frequency of consumption. Most people eat dark chocolate or rice cakes occasionally, but Girl Scout Cookies are often bought in bulk and eaten over several weeks during the annual sales season. A child who eats a sleeve of Thin Mints every day for a month could accumulate a significant amount of heavy metals, especially if their diet already includes other sources.

What the Bakers and the Girl Scouts Say

Both ABC Bakers and Little Brownie Bakers have issued statements following the Consumer Reports findings. They emphasize that all ingredients meet FDA safety standards and that the levels of heavy metals in their cookies are well below regulatory limits. They also note that heavy metals are present in many foods and that their products are safe to eat in moderation.

The Girl Scouts of the USA organization has pointed out that the cookies are tested regularly by third-party labs and that the results consistently show compliance with federal guidelines. They encourage consumers to enjoy the cookies as part of a balanced diet and to consult a pediatrician if they have specific concerns about their child’s exposure.

It is worth noting that the bakers do not disclose the specific sources of their ingredients or the results of their internal testing. This lack of transparency has led some consumer advocacy groups to call for clearer labeling and more public data on heavy metal content in packaged foods.

Practical Steps for Consumers

If you are concerned about heavy metals in Girl Scout Cookies, there are several ways to reduce exposure without giving up the cookies entirely.

Limit portion size. Stick to one serving (two to four cookies, depending on the variety) per day, and avoid eating the whole box in a single sitting. Spread the cookies out over several weeks or months rather than finishing them quickly.

Diversify your diet. Heavy metal accumulation is a concern when the same foods are eaten repeatedly. If your child eats Girl Scout Cookies, make sure they also eat a variety of other fruits, vegetables, and whole grains that are lower in heavy metals. Foods high in calcium, iron, and vitamin C can help reduce the absorption of lead and cadmium.

Check for other sources. Rice, chocolate, spinach, and some fish are common sources of heavy metals. If your family eats these foods frequently, you may want to reduce the number of cookies you buy. The FDA and EPA both offer guidance on safe consumption levels for fish and rice products.

Consider organic options. Organic certification does not guarantee the absence of heavy metals, but organic farming practices typically avoid the use of synthetic fertilizers and pesticides that can contain trace contaminants. Some consumers choose organic versions of chocolate and grains to lower their overall exposure.

Talk to a doctor. If you are pregnant, nursing, or have a child with a known sensitivity to heavy metals, consult a healthcare provider. They can help you assess your family’s overall exposure and recommend dietary adjustments if needed.

Key Takeaways

• Consumer Reports found measurable levels of arsenic, cadmium, lead, and mercury in Girl Scout Cookies, but the amounts are low and within federal safety limits for occasional consumption.
• The heavy metals come from soil and water absorbed by crops like cocoa and wheat, not from the baking process itself.
• Health risks from these metals are cumulative over time, so the main concern is for children who eat large quantities of cookies regularly over many years.
• The levels in Girl Scout Cookies are similar to those in dark chocolate, rice cakes, and other common snack foods.
• Limiting portion sizes, diversifying your diet, and checking for other sources of heavy metals can help reduce overall exposure.
• For specific health concerns, especially for young children or pregnant women, consult a healthcare provider.