1. Introduction
With the development of social economy and the acceleration of life rhythm, men's health issues have become increasingly prominent. Unhealthy lifestyles such as prolonged staying up late, irregular diet, lack of exercise, and high mental pressure have led to a year-by-year increase in the incidence of prostatitis, benign prostatic hyperplasia, sexual dysfunction, and low immunity, which seriously affect men's quality of life. The search for safe, effective, and natural health care raw materials has become a research hotspot in the field of men's health care.
Rosa laevigata Michx. belongs to the genus Rosa of the Rosaceae family, widely distributed in East China, Central China, South China and other regions with abundant resources. Its fruit, as a traditional Chinese medicinal material, has a sour, sweet and astringent taste, neutral nature, and belongs to the kidney, bladder, and large intestine meridians. It has the effects of securing essence and reducing urination, stopping metrorrhagia and leukorrhea, and astringing intestines to stop diarrhea. Traditionally, it is clinically used to treat spermatorrhea, frequent urination, metrorrhagia and leukorrhea, chronic diarrhea and dysentery. With the in-depth research of modern medicine on Rosa laevigata Michx., it has been found that its active components have unique advantages in regulating men's physiological functions and preventing related diseases, opening up a broad space for its application in men's health care. Based on existing research results, this paper systematically expounds the active components of Rosa laevigata Michx. and their men's health care value, providing a reference for their industrial application.
2. Main Active Components and Extraction Processes of Rosa laevigata Michx.
The pharmacological activity of Rosa laevigata Michx. is closely related to its rich chemical components. At present, the isolated and identified active components mainly include polysaccharides, triterpenoids, flavonoids, organic acids, etc. The structure and properties of different components determine their unique physiological functions. At the same time, scientific extraction process is the key to ensuring the activity and utilization rate of active components.
2.1 Types and Structural Characteristics of Main Active Components
2.1.1 Polysaccharide Components
Rosa laevigata Michx. Polysaccharide (RLP) is a class of active components with relatively high content in Rosa laevigata Michx. It is composed of various monosaccharides such as glucose, galactose, arabinose, and rhamnose linked by glycosidic bonds, with a wide molecular weight distribution. The polysaccharide components obtained by different extraction processes have differences in monosaccharide composition and proportion. Studies have shown that the structure of RLP is closely related to its biological activity, and the integrity of the main chain structure and the degree of side chain modification will affect its antioxidant, immunomodulatory and other functions.
2.1.2 Triterpenoid Components
Triterpenoids are one of the important material bases for Rosa laevigata Michx. to exert pharmacological effects. The main isolated ones include ursolic acid, oleanolic acid, tormentic acid, etc. Most of these components belong to pentacyclic triterpenoid structures and have a wide range of biological activities. Among them, ursolic acid and oleanolic acid are two components that have been studied in depth. They have similar structures, both with a pentacyclic triterpene parent nucleus, and only differ in the substituent at the C-20 position. Their anti-inflammatory, anti-tumor, and liver-protective effects have been confirmed by a large number of experiments.
2.1.3 Flavonoid Components
The flavonoid components in Rosa laevigata Michx. mainly include quercetin, kaempferol, rutin, etc. Most of these components exist in the form of glycosides and have the basic structure of benzopyrone. Flavonoids are natural antioxidants, and the phenolic hydroxyl groups in their molecular structures can effectively scavenge free radicals. At the same time, they also have the effects of regulating immunity, anti-inflammation, and improving blood circulation. Although the content of flavonoids in Rosa laevigata Michx. is not as high as that of polysaccharides and triterpenoids, they still have important research value due to their diverse physiological functions.
2.1.4 Organic Acid Components
The fruit of Rosa laevigata Michx. is rich in organic acids, such as citric acid, malic acid, tartaric acid, succinic acid, etc., among which citric acid has the highest content. Organic acid components not only affect the taste of Rosa laevigata Michx. but also have certain pharmacological activities, such as regulating the acid-base balance in the body, promoting the secretion of digestive juices, and enhancing body metabolism. In addition, organic acids can also synergize with other active components to improve their bioavailability.
2.2 Extraction Processes of Active Components
The extraction efficiency of active components from Rosa laevigata Michx. is affected by many factors such as extraction method, solvent selection, extraction temperature, and extraction time. Traditional extraction methods mainly include water extraction, alcohol extraction, ultrasonic extraction, etc. Modern extraction technologies such as microwave-assisted extraction, supercritical fluid extraction, and enzyme-assisted extraction have gradually been applied to the extraction of active components from Rosa laevigata Michx. due to their advantages of high extraction efficiency, low energy consumption, and good retention of active components.
For Rosa laevigata Michx. polysaccharides, water extraction or ultrasonic-assisted water extraction is commonly used. Using water as the solvent, extraction under appropriate temperature and time can effectively retain the activity of polysaccharides. Triterpenoids and flavonoids have certain fat solubility, so alcohol extraction is mostly used, and ethanol is commonly used as the solvent. The extraction process is optimized by adjusting parameters such as ethanol concentration and extraction temperature. Supercritical fluid extraction uses CO₂ as the extractant, and extracts under low temperature and high pressure conditions, which can maximize the retention of the structure and function of active components, especially suitable for the extraction of heat-sensitive components, but the cost is relatively high. Different extraction processes have their own advantages and disadvantages, and appropriate extraction methods should be selected according to the properties of the target components and industrialization needs in practical applications.
3. Effects and Mechanisms of Active Components of Rosa laevigata Michx. in Men's Health Care
Based on the physical and chemical properties and pharmacological activities of the active components of Rosa laevigata Michx., their applications in the field of men's health care are mainly concentrated in prostate health maintenance, reproductive health improvement, anti-fatigue, and immunity regulation. The relevant mechanisms of action have been initially confirmed by a large number of in vitro and in vivo experiments.
3.1 Prostate Health Maintenance Effect
Prostatitis and benign prostatic hyperplasia are common urinary system diseases in middle-aged and elderly men, and their pathogenesis is closely related to inflammatory response, oxidative stress, hormone imbalance and other factors. The triterpenoids, flavonoids and polysaccharides in Rosa laevigata Michx. have significant effects in improving prostate function.
Ursolic acid, as the main triterpenoid component in Rosa laevigata Michx., has clear anti-inflammatory activity. Studies have found that ursolic acid can reduce the release of inflammatory factors such as tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) by inhibiting the activation of nuclear factor-κB (NF-κB) signaling pathway, thereby alleviating the inflammatory response of prostate tissue. In addition, ursolic acid can also inhibit the excessive proliferation of prostate epithelial cells, which has a certain inhibitory effect on benign prostatic hyperplasia.
Rosa laevigata Michx. polysaccharides and flavonoids protect prostate tissue through antioxidant effects. Long-term oxidative stress in prostate tissue can lead to cell damage and induce inflammation and hyperplasia. Rosa laevigata Michx. polysaccharides can improve the activities of antioxidant enzymes such as superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), reduce the content of malondialdehyde (MDA), scavenge excessive free radicals in the body, and alleviate the damage of oxidative stress to prostate cells. Quercetin, a flavonoid component, also has strong antioxidant capacity and can synergize with polysaccharides to exert a protective effect.
3.2 Reproductive Health Improvement Effect
Men's reproductive health is closely related to sperm quality and sex hormone levels. Unhealthy lifestyles and environmental factors can easily lead to decreased sperm motility, reduced quantity, and affect reproductive function. Rosa laevigata Michx. has the effect of "securing essence and reducing urination" in traditional medicine, and modern studies have confirmed that its active components have a scientific basis in improving men's reproductive function.
Rosa laevigata Michx. polysaccharides have a positive regulatory effect on sperm quality. Animal experiments have shown that Rosa laevigata Michx. polysaccharides can improve the motility and survival rate of sperm in male rats and reduce the sperm aberration rate. Its mechanism of action may be related to the following aspects: first, protecting the integrity of sperm cell membrane through antioxidant effect and reducing free radical damage to sperm DNA; second, regulating the function of the hypothalamic-pituitary-gonadal axis, promoting the secretion of sex hormones such as testosterone, and providing a good endocrine environment for sperm production and maturation.
In addition, the flavonoid components in Rosa laevigata Michx. are also involved in the regulation of reproductive function. Quercetin can improve the blood circulation of the reproductive system, increase the blood supply to testicular tissue, and provide sufficient nutrients for sperm production; at the same time, its anti-inflammatory effect can alleviate the adverse effects of reproductive system inflammation on sperm production.
3.3 Anti-Fatigue Effect
Fatigue is a common sub-health state in modern men. Long-term fatigue can lead to decreased body immunity and reduced work efficiency. The active components of Rosa laevigata Michx. can exert anti-fatigue effects by regulating body energy metabolism and enhancing antioxidant capacity.
Rosa laevigata Michx. polysaccharide is one of the main active components for its anti-fatigue effect. Studies have found that Rosa laevigata Michx. polysaccharide can improve the endurance of mice and prolong the swimming time; at the same time, it can significantly reduce the contents of lactic acid (LA) and blood urea nitrogen (BUN) in fatigued mice, and increase the reserves of liver glycogen and muscle glycogen. Lactic acid and blood urea nitrogen are metabolic products during body fatigue, and their increased content can lead to muscle soreness and fatigue; while liver glycogen and muscle glycogen are important energy reserve substances for the body. Rosa laevigata Michx. polysaccharide effectively relieves fatigue symptoms by promoting glycogen synthesis and reducing the accumulation of metabolic waste.
Triterpenoid components such as oleanolic acid also have a certain anti-fatigue effect. They can improve the body's energy metabolism, increase the activity of mitochondrial respiratory chain enzymes, and increase the production of ATP, providing more energy for the body, thereby enhancing the body's anti-fatigue ability.
3.4 Immunity Regulation Effect
。Immunity is an important barrier for the body to resist the invasion of external pathogens. Men are prone to decreased immunity due to factors such as high life pressure and irregular work and rest, increasing the risk of illness. The active components of Rosa laevigata Michx. can enhance the body's immunity by regulating the function of immune cells and promoting the secretion of cytokines.
Rosa laevigata Michx. polysaccharide has a two-way regulatory effect on the immune system and is a good immunopotentiator. In vitro experiments have shown that Rosa laevigata Michx. polysaccharide can promote the phagocytic function of macrophages, enhance the proliferation and differentiation of T lymphocytes and B lymphocytes, and improve the activity of natural killer cells (NK cells). In vivo experiments have also confirmed that Rosa laevigata Michx. polysaccharide can increase the immune organ index (such as thymus index and spleen index) of immunocompromised mice, and promote the secretion of immune factors such as interleukin-2 (IL-2) and γ-interferon (IFN-γ), thereby enhancing the specific and non-specific immune functions of the body.
Rutin, a flavonoid component, also has an immunomodulatory effect. It can regulate the activity of immune cells and enhance the body's immune response by inhibiting the release of immunosuppressive factors.
4. Application Status and Problems of Rosa laevigata Michx. in Men's Health Care Products
4.1 Application Status
Based on the medicinal and edible properties and clear health benefits of Rosa laevigata Michx., its application in men's health care products has initially taken shape. The product forms mainly include health food, health drinks, and traditional Chinese medicine compound preparations.
In the field of health food, Rosa laevigata Michx. is often compounded with other raw materials with men's health care effects (such as maca, wolfberry, epimedium, etc.) to make capsules, tablets, granules and other products, which are mainly used to improve prostate function, enhance immunity, and resist fatigue. For example, health food with Rosa laevigata Michx. and maca as the main raw materials can effectively regulate men's endocrine function and improve fatigue through their synergistic effect.
In the field of health drinks, the fruit of Rosa laevigata Michx. can be directly used to brew fruit wine and make juice drinks. Rosa laevigata Michx. fruit wine not only has a unique taste but also is rich in active components of Rosa laevigata Michx., which has certain health value and is deeply loved by consumers. In addition, compound health tea made from Rosa laevigata Michx., hawthorn, tangerine peel and other raw materials has gradually become a market hotspot due to its convenient drinking and clear efficacy.
In traditional Chinese medicine compound preparations, Rosa laevigata Michx. is a commonly used medicinal material for the treatment of men's urinary and reproductive system diseases. For example, classic prescriptions such as Jinkui Shenqi Pill and Jinsuo Gujing Pill all contain Rosa laevigata Michx. components, which are used to treat symptoms such as spermatorrhea and frequent urination, and are widely used in clinical practice.
4.2 Existing Problems
Although Rosa laevigata Michx. has broad application prospects in the field of men's health care, there are still some problems that need to be solved urgently. First, the research on the mechanism of action of active components is not in-depth enough. Most studies focus on the pharmacological effects of the overall extract, and the research on the specific action targets and signaling pathways of a single active component in specific health functions is insufficient, which limits its precise application. Second, the level of product research and development needs to be improved. Most existing products are mainly simple compounding, lacking precise formula design based on the synergistic effect of active components, and product homogeneity is serious. Third, the quality control system is not perfect. Factors such as the origin, harvesting time, and processing method of Rosa laevigata Michx. raw materials will affect the content of its active components, but some current products lack unified quality standards, leading to uneven product quality. Fourth, the market awareness is insufficient. Consumers have little understanding of the health benefits of Rosa laevigata Michx., which limits the market promotion of products.
5. Development Prospects and Outlook of Rosa laevigata Michx. in the Field of Men's Health Care
With the continuous improvement of men's health awareness and the increasing demand for natural health care raw materials, Rosa laevigata Michx. has broad development prospects in the field of men's health care due to its abundant resources, clear efficacy, and safe properties. In the future, the in-depth development and application of Rosa laevigata Michx. can be promoted from the following aspects:
First, strengthen basic research, in-depth explore the mechanism of action of single active components and compound preparations of Rosa laevigata Michx. in men's health care, clarify their action targets, and provide a scientific basis for product research and development. For example, study the effect of Rosa laevigata Michx. polysaccharide on the signaling pathway of prostate cells or the regulatory effect of ursolic acid on the expression of genes related to sperm production through molecular biology techniques.
Second, improve the level of product research and development, carry out precise formula design based on the synergistic effect of active components, and develop high-end health care products with targeted efficacy. For example, Rosa laevigata Michx.-saw palmetto compound products for prostate problems, Rosa laevigata Michx.-ginseng compound products for anti-fatigue, etc. At the same time, enrich product forms to meet the needs of different consumers.
。Third, establish a sound quality control system, conduct quality monitoring throughout the process from raw material planting, harvesting, processing to product production, formulate unified active component content standards and product quality standards, and ensure the stability and safety of product quality.
Fourth, strengthen market promotion and popular science publicity, improve consumers' awareness of the health benefits of Rosa laevigata Michx. through professional academic exchanges, popular science articles, product experience and other methods, and establish a good product brand image.
。In addition, modern biotechnology such as genetic engineering and fermentation engineering can also be used to modify the structure or biotransform the active components of Rosa laevigata Michx., improve their biological activity and bioavailability, and open up new ways for the efficient utilization of Rosa laevigata Michx. resources.
6. Conclusion
As a traditional medicinal and edible plant, Rosa laevigata Michx. has various pharmacological activities in its polysaccharides, triterpenoids, flavonoids and other active components, and plays an important role in men's prostate health care, reproductive health improvement, anti-fatigue and immunity regulation. Although there are still problems such as insufficient research on the mechanism of action and product homogeneity in the application of Rosa laevigata Michx. in men's health care products, with the in-depth development of basic research, the improvement of product research and development level and the improvement of quality control system, the development potential of Rosa laevigata Michx. resources will be further released. In the future, Rosa laevigata Michx. is expected to become an important natural raw material in the field of men's health care, providing more safe and effective health care options for men's health.
