According to reporting in Reuters, the KMT opposes imports of US pork, saying that ractopamine poses a health risk to Taiwan’s consumers.

President Tsai Ing-wen's decision in August to permit imports of US pork containing ractopamine, banned in the European Union and China, has roiled Taiwan politics.

The KMT has staged noisy protests and flung pig entrails in parliament on one occasion last month to protest against the plans.

The government says nobody will be forced to eat the pork and that the move brings Taiwan into line with international norms. Major Taiwanese food firms have already pledged not to sell pork made with ractopamine.

But with the ruling Democratic Progressive Party having a majority in parliament, the KMT was never going to be able to block the administrative measures that allow ractopamine pork.

"Ractopamine pork is poison pork," KMT lawmaker Lai Shyh-bao told parliament, holding up a large sign reading the same message.

Premier Su Tseng-chang told reporters the government would protect people's health.

"We have seen that importers have publicly said they will not import ractopamine pork," he added.

The KMT cancelled plans for public protests against the decision outside parliament after Taiwan reported on Tuesday 22 December its first locally-transmitted COVID-19 case since April.

The issue is extremely sensitive for Taiwan's government as the United States is the Chinese-claimed island's most important international backer and supplier of arms.

Taiwan's government hopes the easing of US pork imports will pave the way for a long-hoped for free trade deal with Washington. The de facto US embassy in Taiwan has decried "disinformation" from politicians about food safety.

Pork is Taiwan's most popular meat, with average per capita consumption of around 40 kg. Most pork consumed in Taiwan is domestically reared.

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