The harm of inferior stainless steel to the human body

Poor-quality stainless steel cookware is mostly made of non-food-grade materials such as 201 and 202, with heavy metal ratios of manganese, chromium, nickel, and others seriously exceeding standards. It has poor corrosion resistance and can easily release harmful substances under high temperature, acidic, alkaline, or salty conditions. Long-term use can continuously harm human health.
Its manganese content is far higher than the national standard. Excessive manganese intake can damage the central nervous system, causing dizziness, headaches, memory decline, irritability, and slow reactions, and in severe cases it can affect bone and liver and kidney metabolism. At the same time, toxic heavy metals such as hexavalent chromium, lead, and nickel may leach from inferior materials. Hexavalent chromium has strong toxicity and potential carcinogenic risk, and can irritate the digestive and respiratory systems; lead can affect hematopoiesis and nervous system function, harming children's intellectual development and adults' organ function.
Long-term use of such cookware allows heavy metals to gradually enter the human body with food and accumulate, making them difficult to metabolize and excrete. Mild cases result in gastrointestinal discomfort such as nausea, abdominal pain, and indigestion, while severe cases can lead to chronic poisoning, increasing the burden on the liver and kidneys and raising the risk of various chronic diseases. Especially for sensitive populations such as the elderly, pregnant women, and children, the harm is more significant. Therefore, it is essential to choose food-grade stainless steel products that meet national standards 304 or 316 in daily life.