Background
Rambutan peel polyphenols (RPPs) are promising functional products with health-promoting benefits including antidiabetic and antioxidant properties. Given the rising consumer demand for natural health products, RPPs have attracted considerable scientific attention, particularly in the areas of extraction optimization, pharmacological mechanisms, and potential industrial applications.
Scope and approach
This review highlights recent advancements in RPPs extraction, mechanisms insights into antioxidant activity, the role in regulating glucose and gut homeostasis, and their digestion and absorption properties. It also summarizes patents on rambutan peel extract in the sectors of extraction methods and potential application.
Key findings and conclusions
Geraniin is the main component of RPPs, which are primarily composed of ellagitannins. Innovative extraction techniques are increasingly used to recover RPPs to achieve efficient and sustainability. RPPs possess superior antioxidant activity, stabilizing easily oxidizable compounds through molecular interactions. And RPPs regulate blood glucose homeostasis by inhibiting digestive enzymes and advanced glycation end products, improving glycolipid metabolism, and reducing oxidative stress and inflammation, and studies related to the mechanism of action are in progress. RPPs can also maintain gut health by remodeling gut microbiota and promoting beneficial microbiota-derived metabolites. Additionally, gastrointestinal degradation and microbial metabolism of RPPs are the main pathway for exerting health effects. The patent activity of RPPs focus on extraction and application potential in food, pharmaceuticals, and cosmetics. Future research should prioritize extraction processes, molecular targets, gut-microbe interactions, and absorption/metabolism to facilitate the market development of RPPs.
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