Beta-carotene is an important natural pigment that is very beneficial to human health. It is widely found in vegetables and fruits. The three main functions are antioxidant effects, cell gap junction-related functions and immune-related functions. Because of its diverse functions, beta-carotene is believed to prevent and treat many chronic diseases. Gastric cancer is one of the most important diseases it can treat. Gastric cancer is a type of cancer with a high incidence. Its etiology varies, and the pathogenesis is complex. Gastric cancer seriously affects human health. The role of beta-carotene, a natural nutrient, in gastric cancer has been explored by many researchers, including molecular mechanisms and epidemiological studies. Molecular studies have mainly focused on oxidative stress, cell cycle, signal transduction pathways and immune-related mechanisms of beta-carotene in gastric cancer. Many epidemiological surveys and cohort studies of patients with gastric cancer have been conducted, and the results of these epidemiological studies vary due to the use of different research methods and analysis of different regions. This paper will summarize the results of these studies, mainly in terms of molecular mechanisms and epidemiological research results, which will provide a systematic basis for future studies of the treatment and prognosis of gastric cancer. This paper will help researchers identify new research directions.

中文翻译：

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β-胡萝卜素及其对胃癌的保护作用。

β-胡萝卜素是一种重要的天然色素，对人体健康非常有益。它广泛存在于蔬菜和水果中。三个主要功能是抗氧化作用、细胞间隙连接相关功能和免疫相关功能。由于其多种功能，β-胡萝卜素被认为可以预防和治疗许多慢性疾病。胃癌是它可以治疗的最重要的疾病之一。胃癌是一种高发癌症。其病因多样，发病机制复杂。胃癌严重影响人类健康。许多研究人员已经探索了β-胡萝卜素（一种天然营养素）在胃癌中的作用，包括分子机制和流行病学研究。分子研究主要集中在氧化应激、细胞周期、β-胡萝卜素在胃癌中的信号转导通路和免疫相关机制。已经对胃癌患者进行了许多流行病学调查和队列研究，这些流行病学研究的结果因使用不同的研究方法和不同地区的分析而有所不同。本文将总结这些研究的结果，主要从分子机制和流行病学研究成果方面进行总结，为今后胃癌的治疗和预后研究提供系统依据。本文将帮助研究人员确定新的研究方向。并且这些流行病学研究的结果因使用不同的研究方法和不同地区的分析而有所不同。本文将总结这些研究的结果，主要从分子机制和流行病学研究成果方面进行总结，为今后胃癌的治疗和预后研究提供系统依据。本文将帮助研究人员确定新的研究方向。并且这些流行病学研究的结果因使用不同的研究方法和不同地区的分析而有所不同。本文将总结这些研究的结果，主要从分子机制和流行病学研究成果方面进行总结，为今后胃癌的治疗和预后研究提供系统依据。本文将帮助研究人员确定新的研究方向。