Since its UK launch earlier in 2023, Temu has regularly topped app download charts. The app has nine million monthly users according to figures given to the BBC by data analyst Sensor Tower.
The online marketplace with the slogan "shop like a billionaire" allows consumers to buy directly from Chinese manufacturers at low prices.
Alicia Kearns MP is calling for greater scrutiny of the online marketplace to make sure "consumers are not inadvertently contributing to the Uyghur genocide".
China has been accused of detaining more than one million Uyghurs in East Turkistan against their will over the past few years.
The region produces about a fifth of the world's cotton, and human rights groups have voiced concerns that much of that cotton export is picked up by forced labour.
But speaking about a lack of transparency around its supply chains, Ms Kearns warned the reality of cheaper prices could come from a "reliance on slave labour".
Chloe Cranston from Anti-Slavery called on Temu to provide "full transparency on its supply chain," while the Chief Executive of Unseen, Andrew Wallis OBE, said "It is imperative consumers, but also governments, know the circumstances and the situations in which goods are manufactured and brought to market.
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