Tea polyphenols (TPP) have shown various biological activities. However, due to their poor stability in the gastrointestinal (GI) tract, TPP exhibit low absorption and bioavailability which limit their applications in food fields. Recently, several studies have focused on the utilization of nanotechnology to solve these problems. In this review, we introduced the embedding materials and methods of TPP窶人oaded nanoparticles and the potential mechanisms for improving bioavailability, such as to protect TPP from pH stress, enzymes and ions of the GI tract, and increase of the permeability. Furthermore, future challenges and application prospects of nanoparticles as carriers for the delivery of TPP were also discussed.

中文翻译：

---

纳米技术提高了茶多酚的递送效率和生物利用度。

茶多酚（TPP）具有多种生物活性。然而，由于TPP在胃肠道中的稳定性差，因此TPP显示出低吸收性和生物利用度，这限制了它们在食品领域的应用。近来，一些研究集中于利用纳米技术来解决这些问题。在这篇综述中，我们介绍了TPP窭纳米颗粒的包埋材料和方法，以及改善生物利用度的潜在机制，例如保护TPP免受pH应力，胃肠道酶和离子的影响以及增加渗透性。此外，还讨论了纳米颗粒作为TPP载体的未来挑战和应用前景。