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Herbs and Spices on the Carnivore Diet?

By Liam McAuliffe Updated on

One of the keys to the benefits of the carnivore diet is the elimination of plant foods that contain inflammatory plant toxins and antinutrients. Spices and herbs on carnivore are no exception.

In fact, recent studies have revealed that many varieties of common spices contain concentrated amounts of toxins along with heavy metals, harmful bacteria, insect parts, and animal hair. 

In short, it’s better to avoid spices, herbs, and seasonings on carnivore. For most people a buttery, salty, fatty cut of steak is all you need to get your taste buds jumping for joy. 

However, if eliminating spices makes it too difficult to stick with your ancestral all-meat diet, then we have some tips for playing it safer. 

Let’s explore the key issues surrounding carnivore diet spices. 

Table of Contents

Contamination of Herbs and Spices: The Science

You may be tempted to dismiss the toxins and contaminants in spices because you only use a relatively small amount. But that small amount alone can contain harmful levels of lead, arsenic, and naturally occurring oxalate. 

And even if the contaminants in your spices fall into “safe” levels, chronic low-level exposure to these contaminants can contribute to low-grade inflammation and autoimmune disorders. 

This is especially the case with heavy metals–even small amounts can build up in your body over time.

title page of consumer reports article on spice contamination

This 2021 study from Consumer Reports found that herbs and spices from numerous major store-bought brands contained unhealthy levels of heavy metals. 

The study tested 126 store-bought spices and found that ⅓ had high enough levels of arsenic, lead, and cadmium combined to pose a health risk for regular consumers.

The study found that: 

  • Dried thyme and oregano were among the most “surprising and worrisome” sources of heavy metals 
  • Tested spices were from popular brands including McCormick, Trader Joe’s, Whole Foods, and Walmart, among others
  • 31 products contained lead that exceeded the maximum amount allowed for both adults and children
  • 40 products had dangerously high levels of lead, arsenic, and cadmium
  • No single predictor for spices with the highest levels of heavy metal contamination. Labels like “organic” and “packed in the USA” made no difference
  • Thyme and oregano had the most contamination
  • All five thyme products and seven types of ground oregano had concerning levels of heavy metals

Though the contaminants in any one spice might only cause harm over repeated exposure, a combination of just a quarter-teaspoon of Great Value (Walmart) Chili Powder, Trader Joe’s Organic Cumin, and La Flor Oregano contains enough arsenic, cadmium, and lead to cause immediate poisoning. 

The study authors state, “Adulteration of spices is not unusual, and the addition of toxic agents to spices is common.”

title page from study on lead in spices

This study from 2019 tested nearly 1,500 samples from 41 countries.

Lead was detected in more than 50% of the spices sampled. 

More than 30%  of the samples had lead concentrations greater than the allowable limit of 2 parts per million (ppm). 

The study also found that spices bought abroad (not subjected to import safety checks) had extremely high concentrations of lead. With Turmeric and Georgian Kharcho suneli averaging over 50ppm. Whereas domestically purchased versions had much lower concentrations. 

Spices imported from Pakistan, Bangladesh, Nepal, and Morocco had the highest concentrations of lead.

Scientist making Lab research of curcuma impact on immune system

title from study on lead exposure in the US due to spices

In this 2017 study, researchers measured levels of lead in Turmeric samples purchased in the Boston area from both supermarkets and local ethnic markets.

They note that lead chromate, which is vibrant yellow, is often added to turmeric to increase both weight and color. 

The researchers found that concentrations in 16 of the 32 samples exceeded the FDA’s allowable level of lead, with 2 samples from Bangladesh coming in at an astounding 34.78 and 99.50 ppm. 

The paper warns that childhood lead poisoning from contaminated turmeric have occurred in the United State. 

title from Kansas study on contaminated spices

This 2014 study by Kansas State University found that four out of ten bulk spices from farmers’ markets and spice stores in the Kansas area were contaminated with heavy metals, as well as mycotoxins and bacteria.

The contamination included popular bulk spices like black pepper, thyme, oregano, and turmeric, which all tested positive for salmonella. 

Mycotoxins (toxic molds) are also a concern for coffee on the carnivore diet, which you can learn about here

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Heavy Metals in Carnivore Diet Spices

Blood sample tube for analysis heavy metals in laboratory. Blood tube test with requisition form for heavy metals test

Spices can become contaminated by heavy metals in a few ways, including: 

  • Intentional adulteration to enhance color and weight–i.e. turmeric and lead chromate
  • from pesticides
  • From being grown in areas contaminated with industrial waste
  • From processing and packaging equipment

Farmers in countries like Bangladesh, India, and Pakistan add lead chromate to turmeric to give it a vibrant bright yellow color. This allows them to sell low-quality roots at higher prices. Lead chromate also increases the weight. 

For this reason, turmeric has been named a “spice of concern,” and the FDA has issued an import alert warning that shipments may be detained from India and Bangladesh.

What happens when you’re exposed to unhealthy levels of heavy metals? 

In children, exposure to heavy metals can impair brain development, lower IQ, and increase risk for behavioral problems. 

In both adults and children, heavy metal exposure can contribute to central nervous system disorders, hypertension, reduced immune function, and kidney damage. 

Coumarin in Cinnamon

Ceylon Zimt und Cassia Zimt im Vergleich - Freisteller mit Besc

Cinnamon is a common spice often paired with Turmeric in “golden lattes.” 

Cinnamon has a comforting sweet flavor. But a variety called cassia cinnamon is one of the most concentrated sources of a harmful compound called coumarin.

High doses of coumarin have been linked to

  • Liver damage
  • Cancer formation
  • Impaired cognitive development

The exact amount of coumarin in a given amount of cinnamon is unknown unless tested. However, one study on children found that regularly sprinkling coumarin on oatmeal led to unsafe levels.  

To avoid coumarin, eliminate cinnamon or consume only Ceylon cinnamon (Cinnamomum Verum). It’s harder to find and more expensive, but much safer.

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Salmonella in Spices

The FDA has identified 14 foodborne outbreaks linked to spices from 1973 to 2010, including five in the United States. 

The events sickened 1,946 people leading to 128 hospitalizations and 2 deaths. Those hardest hit were infants and children. 

A 2013 study by the FDA found that 12% of spice shipments were tainted with pathogens such as Salmonella or filth that included insect parts or animal hair.

Salmonella can be serious, leading to illness and death. Symptoms include diarrhea, fever, and abdominal cramps. 

Oxalates in Carnivore Diet Spices

calcium oxalate crystal in urine analysis.

In addition to contaminants from the production process, spices on the carnivore diet can also contain high amounts of antinutrients

One common and potentially harmful antinutrients found in herbs and spices are oxalates

When combined with heavy metals, oxalates can be especially problematic by trapping metals in body tissue, making them difficult to eliminate. 

Other issues caused by oxalates include: 

  • Suppressed immune system and reduced mitochondrial activity.
  • Contribute to kidney stone formation.
  • A significant connection between oxalate crystals and fungal infections in the intestine

Here’s a list of high oxalate spices. Note that turmeric and cinnamon are near the top. 

High Oxalate Spices

Milligrams (mg) of oxalate (culinary portions)

SpicePer 1/2 teaspoon

(2.5 ml)

Per 10 grams
Celery Seed16128
Fennel seed11129
Curry Powder12120
Cumin Seed, ground10100
Lemon Peel, dried1073
Onion Powder1073
Coriander Seed9103
Ginger, Dried896

Moderate Oxalate Spices

Milligrams (mg) of oxalate (culinary portions)

SpicePer 1/2 teaspoon

(2.5 ml)

Per 10 grams
Garlic Powder0.10.7
Almond Extract0.20.6
Mustard, ground powder0.21.7
White Pepper0.43.0
Red Pepper Flakes112
Thyme, Dried118
Mrs. Dash Seasoning Blend119
Ginger, Fresh217.5
Cardamom, ground331
Cayenne Pepper333
Chili Powder431
Oregano, dried445

Source Sally K. Norton and Vulvar Pain Foundation

How to Avoid Exposure to Toxins in Spices on the Carnivore Diet

The easiest way to avoid exposure to toxins from spices is simply to eliminate spices. 

A well-formulated carnivore diet meal plan centered around succulent fatty meats with butter and plenty of salt is delicious, satiating, and nutritionally replete.

If you’re coming to a carnivore diet to treat a serious autoimmune disorder or other diseases, an elimination protocol of only salt, meat, and water (lion diet) is likely the best option. 

If you’re going carnivore simply to optimize already good health through ancestral eating, and you feel that you really need to include a bit of spice from time in order to stick with your carnivore diet than these tips might help: 

  • Don’t buy your spices when traveling overseas or online
  • Grow your own herbs and spices
  • Avoid dried and powdered spices–buy fresh oregano, cilantro, curry leaves, thyme, dill, etc. 

Detoxing from Toxic Spices 

Modern life exposes us to heavy metals through food, air, and water. Though your body has a system for processing and eliminating toxins through the liver, kidneys, gut, and skin, it can get overwhelmed by relentless exposure. 

Minimize exposure to toxic metals and plant toxins by:

  • Eliminating plant foods
  • Eating minimally processed meats 
  • Drink filtered, spring, or mineral water
  • Cutting out carbs and sugars
  • Eliminating all processed foods
  • Practicing low-intensity exercises to keep your metabolism stimulated
  • Avoiding alcohol on carnivore to support your liver’s ability to naturally remove toxins

Herbs and Spices on the Carnivore Diet: Dr. Kiltz’s Bottom Line

Herbs and spices are plant foods. The carnivore diet is an all-meat diet that derives significant benefits from eliminating plant foods. 

For many carnivore dieters, the question of carnivore diet spices is as simple as that–it’s a non-starter.

However, if you’re in good health and coming to carnivore simply to optimize your wellbeing, or you can’t imagine sticking with carnivore without some spice, then small amounts of low toxin spices may be acceptable from time to time. 

Remember, an ancestral carnivore diet ought to be an overwhelmingly positive experience. If you’re suffering on it, modify it while still keeping it mostly meat, low-carb, and high-fat.

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