When guinea pigs were given a specific drug called ractopamine every day for a week, the drug stayed longest and in the highest amount in their lungs the day after they stopped taking it—much more than in their muscles, which had almost none.

When guinea pigs were given a specific drug called ractopamine every day for a week, the drug stayed in their lungs much longer than in other organs—even 30 days later—like it got stuck there and took its time leaving.

When guinea pigs were given a specific drug called ractopamine for a week, traces of it stayed in their lungs for a whole month—even after they stopped taking it. This is way longer than scientists usually expect the drug to stick around in the body.

When pigs eat feed with a drug called ractopamine for a month, the drug builds up way more in their kidneys and liver—organs that clean and process toxins—than in their meat, fat, or blood. This means their body is working hard to get rid of it, so it doesn’t stay in the meat you eat.