Why drug stays longer in pig lungs
Comparison of ractopamine residue depletion from internal tissues
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Lungs retained ractopamine at 55.80 μg/kg on day 1 — far higher than any other tissue — and remained significantly elevated for 30 days.
Most assume the liver or kidneys (which process toxins) would hold the most residue. Instead, lungs — not typically seen as a storage organ — became the longest-lasting reservoir.
Practical Takeaways
If you consume organ meats (lungs, liver, kidney), consider sourcing from farms that avoid ractopamine or observe extended withdrawal periods.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Lungs retained ractopamine at 55.80 μg/kg on day 1 — far higher than any other tissue — and remained significantly elevated for 30 days.
Most assume the liver or kidneys (which process toxins) would hold the most residue. Instead, lungs — not typically seen as a storage organ — became the longest-lasting reservoir.
Practical Takeaways
If you consume organ meats (lungs, liver, kidney), consider sourcing from farms that avoid ractopamine or observe extended withdrawal periods.
Publication
Journal
Immunopharmacology and Immunotoxicology
Year
2013
Authors
J. Pleadin, A. Vulić, N. Persi, S. Terzić, Miroslav Andrišić, I. Žarković, Ksenija Šandor, Eleonora Perak
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Claims (4)
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.
Farmers give pigs a drug called ractopamine to make them leaner, but sometimes they don’t wait long enough before sending them to slaughter—so traces of the drug can end up in the pork we eat.