Tea polyphenols (TPs) are among the most abundant functional compounds in tea. They exhibit strong antioxidant, anti-inflammatory, and anti-cancer effects. However, their instability and low bioavailability limits their applications. Nanotechnology, which involves the use of nanoscale substances (sizes ranging from 1 to 100 nm) to improve the properties of substances, provides a solution for enhancing the stability and bioavailability of TPs. We reviewed the preparation, performance, effects, and applications of different types of TPs nanocarriers. First, we introduced the preparation of different nanocarriers, including nanoparticles, nanoemulsions, nanomicelles, and nanolipids. Then, we discussed various applications of tea polyphenol-loaded nanocarriers in functional ingredient delivery, food quality improvement, and active food packaging. Finally, the challenges and future development directions of TPs nanocarriers were elucidated. In conclusion, a nano-strategy may be the “key” to break the application barriers of TPs. Therefore, the use of nano-strategies for the safe, stable, and efficient release of TPs is the direction of future research.

SummaryIn recent years, people have been paying more attention to food safety and dietary health. An increasing number of natural active ingredients are used in the field of food and nutrition. chlorogenic acid (CGA), as a phenolic acid compound extensive present in the diet, has been reported to have a variety of beneficial biological activities in alleviating and preventing various diet‐related chronic diseases. Moreover, it has various applications in food safety and food nutrition as a new type of food additive. In this context, this paper reviews the role of CGA as an antioxidant, antibacterial, hypotensive, hypoglycemic, anti‐obesity and gastrointestinal health agent starting from its distribution, source, in vivo metabolism and isolation. Furthermore, the practical application of chlorogenic acid in active food packaging, food quality control and nutritional dietary supplements is discussed. Finally, the future development and challenges of CGA in the field of food is described, providing new ideas for the application of CGA in food safety and dietary supplements and future research.

Lithocarpus litseifolius (Hance) Chun 1837 is an evergreen tree of Fagaceae, which can be used as sweet tea, natural sweetener, and precious medicinal material. The complete chloroplast genome of L. litseifolius was sequenced and its phylogenetic relationship was analyzed in this study. The chloroplast genome of L. litseifolius has a circular structure with a length of 161,322 bp, and it contains a pair of inverted repeat regions (IRs 25,897 bp), a large single copy (LSC 90,551 bp), and a small single copy (SSC 18,977 bp). There were 131 genes identified, including 37 tRNA, 8 rRNA, and 86 mRNA genes. Phylogenetic analysis of 23 species of Fagaceae indicated that Lithocarpus is monophyletic with strong bootstrap, and L. litseifolius is genetically closely related to Lithocarpus polystachyus.

No abstract