What is a common adulterant tested in milk for quality control?

Antibiotics are a common adulterant tested in milk for quality control because they can disrupt the natural microbial balance in the milk and can pose serious health risks to consumers. The presence of antibiotics in milk may indicate improper treatment of dairy animals or failure to adhere to withdrawal times after administering medication. Testing for antibiotics is critical to ensuring food safety and maintaining public health standards, as it helps prevent potential allergic reactions or other harmful effects that could arise from consuming milk containing these substances. Quality control measures routinely involve testing for various antibiotics to ensure that milk products are safe and compliant with health regulations.