Naringin (also known in the industry as *naringoside* or *citrusin*; chemically identified as naringenin-7-O-neohesperidoside) is a natural flavanone glycoside widely found in citrus plants and serves as a key functional active ingredient characteristic of the Rutaceae family. As a mainstream raw material in the citrus deep-processing and natural plant extract industries, naringin is valued for its stable physicochemical properties, diverse biological activities, and all-natural origin. It is widely utilized across sectors such as pharmaceuticals, functional foods, cosmetics, and food additives, making it one of the most recognized citrus flavonoid ingredients on the market.
I. Core Chemical and Physicochemical Properties
Chemically, naringin has the molecular formula C₂₇H₃₂O₁₄ and a molecular weight of 580.53 (CAS No. 10236-47-2). It is a glycoside compound formed by the linkage of the aglycone naringenin with neohesperidose via a glycosidic bond. Unlike naringenin-which lacks the glycoside structure-naringin exhibits significantly enhanced water solubility, making it better suited for industrial extraction and application scenarios. Its molecular structure displays typical polyphenolic characteristics, which form the fundamental basis for its biological activities, such as antioxidant and anti-inflammatory effects.
Regarding physicochemical properties, pure naringin appears as a white to off-white crystalline powder. It is odorless but possesses the natural, mild bitterness characteristic of citrus; its dihydrate form has a melting point of 171°C. Its solubility profile is distinctly polar: it is readily soluble in methanol, ethanol, and dilute alkaline solutions; soluble in hot water; sparingly soluble in cold water; and virtually insoluble in non-polar organic solvents like petroleum ether and chloroform. This solubility profile serves as the technical basis for mainstream industrial extraction and purification processes. Additionally, naringin demonstrates good thermal stability; it does not readily decompose at the temperatures typically used in food and cosmetic processing, making it compatible with most industrial production workflows.
II. Natural Sources and Distribution Characteristics
Naringin is an endogenous, protective active substance in citrus plants. It accumulates primarily in the peel, immature fruit, and leaves, while its concentration in the fruit pulp is extremely low. Among common Rutaceae crops, pomelos, grapefruits, and bitter oranges possess the highest peel content-far exceeding that of ordinary sweet oranges or mandarins. Notably, the naringin content in the young fruit peels of varieties such as Guanxi Honey Pomelo and Shatian Pomelo is exceptionally high, accounting for over 75% of the total flavonoid content, making them a primary raw material source for industrial extraction.
In industrial production, enterprises primarily utilize citrus processing by-products-specifically pomelo peels, grapefruit peels, and discarded young fruits-as raw materials. This approach not only enables the resource utilization of agricultural residues but also significantly reduces raw material costs, aligning with industry trends toward green processing. Factors such as geographical origin, cultivation environment, and harvest timing directly influence naringin content; since the concentration of active ingredients in immature citrus fruits is far higher than in mature ones, industrial production typically relies on discarded young fruits (collected during the fruit-thinning stage) and fresh peels. Furthermore, naringin is a key active component in traditional Chinese medicines such as *Zhishi* (immature bitter orange), *Zhike* (bitter orange fruit), and *Huajuhong* (tomentose citrus fruit), serving as a vital natural substance in the realm of dual-use medicinal and edible products.
III. Mainstream Industrial Extraction and Purification Processes
Domestic production processes for naringin have matured significantly, with large-scale manufacturing prioritizing green, efficient, and cost-effective methods. The mainstream process comprises three steps designed for industrial-scale production, ensuring no risk of harmful reagent residues.
The first step is raw material pretreatment: collected citrus peels and young fruits undergo cleaning and impurity removal, low-temperature drying, and pulverization/sieving. These steps eliminate impurities and moisture while enhancing the dissolution rate of active ingredients. Next is extraction: the industry predominantly employs ethanol-water solution reflux extraction or hot water extraction-replacing traditional, highly polluting solvent extraction methods-to balance extraction yield with safety. Finally, purification and refining take place: processes such as filtration, concentration, static crystallization, recrystallization, drying, and pulverization remove impurities like pectin, polysaccharides, and pigments. This yields finished naringin products with purity levels of 90%, 95%, or 98%, meeting the graded application requirements of various industries. Advanced purification processes now enable the mass production of high-purity products (exceeding 98%) with minimal impurity levels. These products meet the standards for pharmaceutical and high-end cosmetic raw materials, representing a key direction for technological upgrades within the industry.
IV. Core Bioactivity and Industry Value
Years of pharmacological and applied research have confirmed that naringin possesses various stable and safe bioactive properties. Being natural and free from toxic side effects, it is suitable for compliant use across multiple sectors, with its core value centered on four key dimensions:
First, high-efficiency antioxidant activity: It scavenges free radicals and inhibits lipid peroxidation. Offering superior safety compared to some synthetic antioxidants, it is a preferred choice for natural antioxidant raw materials. Second, anti-inflammatory and soothing effects: It regulates inflammatory pathways and alleviates mild inflammation in the skin and body, making it widely used in the development of soothing skincare products. Third, metabolic regulation: It helps regulate blood lipids, protect vascular endothelium, and improve microcirculation, serving as a key ingredient in functional dietary supplements. Fourth, significant derivative value: Through hydrogenation and modification, naringin can be converted into naringin dihydrochalcone. This derivative boasts a sweetness level over 150 times that of sucrose-with a clean taste and no bitter aftertaste-making it a premium natural alternative to artificial sweeteners in sugar-free foods and functional beverages.
V. Industry-Wide Application Scenarios
Leveraging its natural attributes and diverse bioactivities, naringin has penetrated multiple industries. Products of varying purity levels are tailored to specific application scenarios, demonstrating a clear tiered approach to usage.
Pharmaceutical Sector: High-purity naringin serves as a pharmaceutical intermediate and active pharmaceutical ingredient (API) for developing anti-inflammatory, vascular-protective, and liver-protective formulations. It is also a key quality control marker for Traditional Chinese Medicine (TCM) and is included in the quality standards of multiple pharmacopoeias, marking it as a signature active ingredient in the modernization of TCM.
Functional Food and Dietary Supplement Sector: Medium-to-high purity naringin is commonly used in antioxidant and metabolic-regulating dietary supplements. It also serves as a functional food additive to optimize formulations for sugar-free beverages and healthy snacks, aligning with current consumer trends toward healthy eating. Cosmetics Sector: Leveraging its antioxidant, anti-inflammatory, and soothing/repairing properties, naringin is widely incorporated into skincare products such as serums, lotions, and masks to combat oxidative dullness and soothe skin sensitivity. Its natural origin ensures high compatibility, making it ideal for gentle skincare formulations.
Food Additive Sector: As a precursor for synthesizing natural sweeteners, naringin addresses the safety concerns associated with traditional artificial sweeteners. Additionally, naringin itself serves as a natural bitterness modifier, helping to improve the flavor profiles of certain food products.
VI. Industry Quality Standards and Current Landscape
China's naringin industry has established a standardized production system. Manufacturers strictly control parameters-such as purity, moisture content, ash content, heavy metals, pesticide residues, and microbial levels-across different product grades, adhering to general standards for plant extracts, food ingredients, and pharmaceutical excipients. Market offerings are primarily categorized into food, cosmetic, and pharmaceutical grades, with purity levels ranging from 80% to 98% to meet diverse customer customization needs.
In terms of industry landscape, my country is a major global player in citrus cultivation and deep processing, boasting abundant citrus by-product resources and serving as a core global producer and exporter of naringin. Domestic plant extract enterprises have achieved large-scale, intensive production and continuous process innovation, significantly boosting self-sufficiency in high-purity products. These products are exported to regions including Europe, the Americas, and Southeast Asia, finding wide application in overseas health food and cosmetic ingredient markets. Driven by evolving consumer preferences for natural, eco-friendly, and healthy products, there is a clear trend of replacing synthetic ingredients with natural flavonoids; consequently, the naringin market continues to grow steadily, offering broad prospects for industry development.
VII. Core Industry Advantages
Compared to synthetic flavonoids, naringin's core advantages lie in its natural origin, safety and regulatory compliance, stable activity, and potential for resource utilization. Derived from citrus processing waste, it falls within the scope of the circular economy and aligns with "dual carbon" policy goals. Furthermore, as a natural, non-toxic ingredient, it meets stringent global safety standards for food and cosmetics, eliminating the risks of synthetic residues or regulatory non-compliance. Moreover, it possesses both functional properties and potential for value-added processing; through structural modification, the industry chain can be extended to derive a range of high-value-added products-such as sweeteners and premium active ingredients-demonstrating exceptional industrial extensibility.
Shaanxi Lvke Chunyuan Biotechnology Co., Ltd.
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Huaxia Yue World, Weibin District, Baoji City, Shaanxi Province,china
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86-13992760792( Grace liu Sales manager )
