Shock Discovery: Nitrite Levels in Ready-to-Eat Meat Products Exceed Safety Standards by 50 Times
Ready-to-eat meat products in Thailand were found with nitrite levels up to 50 times the legal safety limit, causing consumers to experience dizziness, vision problems, and numbness, according to the Department of Medical Sciences.
On May 21, 2025, Dr. Sarawut Bunsuk, Director-General of the Department of Medical Sciences under the Ministry of Public Health, reported that the food industry commonly uses sodium and potassium nitrate (Nitrate) or nitrite (Nitrite) preservatives in processed meat products such as sausages, hot dogs, ham, and cured pork to maintain the pink-red color of meat and inhibit dangerous bacteria like Clostridium botulinum.
However, high-level exposure can cause the body to become oxygen-deprived, resulting in symptoms such as cyanosis, shortness of breath, dizziness, and irregular heartbeat. Dr. Sarawut noted that when foods containing nitrate or nitrite undergo high-heat cooking methods such as grilling, roasting, or deep frying until charred, these substances can react with proteins to form "nitrosamine," a carcinogenic compound.
According to the Ministry of Public Health announcement (No. 468, 2025), nitrate usage is limited to no more than 200 milligrams per kilogram, and nitrite to no more than 80 milligrams per kilogram.
Surveillance data from 2024-2025 shows that sausages, bologna, and ham have the highest detection rates for nitrate (61%) and nitrite (55%), though most remain within legal limits. However, ham, cured pork, Isan sausages, and Chinese sausages, while having lower detection rates (nitrate 38%, nitrite 12%), showed four samples exceeding safety standards—one nitrate sample and three nitrite samples—mostly from small-scale producers lacking precise production formula controls.
A particularly alarming finding involved ready-to-eat meat dishes with nitrite levels reaching 3,880 milligrams per kilogram—nearly 50 times the legal standard. Consumers who purchased these products reported abnormal symptoms including vision problems, dizziness, numbness in hands, muscle twitching, and in some cases, loss of consciousness.
The Department of Medical Sciences urges the public to exercise caution when purchasing processed meat products. Recommendations include avoiding products with abnormally bright pink or deep red colors, reducing frequent consumption of these items, and diversifying food choices to mitigate long-term cancer risk from chemical accumulation. Officials also call on all producers to strictly adhere to legal food additive standards to ensure consumer safety, particularly for children and youth.
