Food safety experts have pointed out that spices can be an unexpected source of contamination with mycotoxins, which are toxic chemicals produced by mold.
Although the amounts of pollution are often within permissible limits, cumulative exposure to it may be associated with symptoms such as fatigue, digestive disorders, and weakened immunity.
Mycotoxins are toxic compounds produced by mold that form on agricultural crops such as spices when exposed to heat and moisture during growth, harvesting, or storage. Because spices are grown in warm environments, dried outdoors, ground, and stored for extended periods, they are particularly susceptible to this type of contamination.
The spices most prone to the problem are chili peppers, paprika, black pepper, ginger, and turmeric, especially those coming from hot, humid tropical regions.
How do these toxins affect your health?
Symptoms vary from person to person, but short-term exposure to high levels can cause fatigue, brain fog, headaches, nausea, vomiting, diarrhea, abdominal pain, itching, hives, and chronic sinus problems. The biggest problem is that these symptoms overlap with many other illnesses, leading to misdiagnosis and leaving patients suffering without knowing the true cause.
Over time and with increased exposure, the risks worsen. Some mycotoxins are linked to liver damage and cancer, as well as reproductive problems, weakened immunity, kidney damage, and developmental delays in children. However, experts reassure that these serious consequences are associated with significant and prolonged exposure, not with the typical use of spices in home cooking.
It's not just spices... other foods are contaminated.
Spices are not the primary source of exposure to these toxins; rather, it is staple foods we consume in larger quantities, such as corn, wheat, rice, peanuts, nuts, and dried fruit. Pre-ground coffee beans, tea, meat, dairy products (if the animals were fed contaminated grain), herbal products, and plant-based supplements are also sources.
Experts explain that as a consumer, you have limited control over this problem, as toxins form during production and storage before the product reaches your kitchen. Ordinary cooking doesn't kill them either; while heat may kill the mold itself, the toxins remain in the food. However, there are simple steps you can take to protect yourself and reduce the risk:
First: Buy spices from trusted brands and airtight containers, and avoid those that have been sitting on store shelves for a long time.
Second: Store spices in airtight containers, in a cool, dry place, away from direct sunlight, and avoid placing them near the oven, stove, or dishwasher.
Third: Do not use a wet spoon in the spice container to avoid introducing moisture into it.
Fourth: The most important tip: If you notice a musty smell, clumping due to moisture, discoloration, black spots, or white or pinkish downy growth, discard the spices immediately. But even if the spices look perfectly normal, they may be contaminated, so don't store them for more than 6 to 12 months for ground spices, and one to three years for whole spices.
Fifth: Diversify your spices. Instead of relying on just one or two types of spices, try to vary what you use. This not only helps reduce your risk of exposure but also enhances their nutritional value. If you have an autoimmune disease or an underlying infection such as Lyme disease, you may be more susceptible to the negative effects of mycotoxins than others, so be extra careful.
