Carotenoids are the phytochemicals known for their biological activities. They are found in nature in the form of plants, algae, fungi and in microorganisms. This is the major group having two different structure one with oxygen and without oxygen. The Present article aims to present these molecules as a new therapeutic agent, as it has unrealized efficiency to prevent and reduce the symptoms of many diseases like cancer, neurodegenerative diseases such as Alzheimer, cerebral ischemia, diabetes associated with obesity and hypertension, ophthalmic diseases and many more. It can be utilized in the form of dietary supplement as nutraceutical and pharmaceutical compounds. Yet more research and developing test knowledge is needed to make it available to the humans. In this article its sources, biosynthesis, properties, applicability and commercialization of pigments from naturally produced sources are discussed.

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中文翻译：

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类胡萝卜素：有效预防疾病的综述。

类胡萝卜素是因其生物活性而闻名的植物化学物质。它们以植物，藻类，真菌和微生物的形式在自然界中发现。这是具有两个不同结构的主要基团，一个带有氧，一个没有氧。本文旨在介绍这些分子作为一种新型治疗剂，因为它在预防和减轻许多疾病（如癌症，神经退行性疾病（如阿尔茨海默氏病），脑缺血，与肥胖和高血压有关的糖尿病，眼科疾病和还有很多。它可以膳食补充剂的形式用作营养和药物化合物。还需要更多的研究和开发测试知识以使其对人类可用。在本文中，其来源，生物合成，特性，

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