Alfalfa Extractとは？用途・使用量・代替品・規格

Alfalfa Extract is a natural plant extract product obtained from the whole plant or specific parts of Medicago sativa L. (a leguminous plant) through modern extraction processes. It is a natural product rich in multiple active components. Alfalfa extract contains bioactive components including saponins, flavonoids, polysaccharides, proteins, vitamins, and minerals, making it a natural product with multiple biological activities. Medicago sativa is a perennial herb of the Fabaceae family. It has a thick root that penetrates deep into the soil, well-developed root crown, erect or decumbent stems, quadrangular shape, and lush branches and leaves. The mixed hay of alfalfa contains 18.9% crude protein, 3.37% crude fat, 29.97% nitrogen-free extract, 26.80% crude fiber, and 7.03% ash. Alfalfa is widely distributed, cultivated in most regions of China, and extensively planted as feed and forage across Eurasia and worldwide. Alfalfa extract typically appears as a yellow-green to brown-green powder with a characteristic grassy odor. It is readily soluble in hot water and ethanol, and slightly soluble in cold water. It is widely used in various fields including food, pharmaceuticals, feed, and cosmetics.

Alfalfa extract contains over 120 bioactive components across 12 distinct phytochemical classes. Its main active components include the following categories: 1 Flavonoids: Including luteolin, apigenin, and quercetin. The flavonoid content can reach 150–300 mg per 100g of dried alfalfa leaves, with antioxidant and anti-inflammatory properties. Alfalfa flavonoids also exhibit immunomodulatory, antitumor, antiviral, anti-radiation, anti-aging, and anti-infection pharmacological effects, with minimal toxicity. 2 Saponins: Primarily triterpene saponins such as alfalfa saponins A, B, and C. These can reduce serum total cholesterol by approximately 8%–12%, contributing to improved cardiovascular health. 3 Polysaccharides: Mainly water-soluble arabinogalactans with molecular weight typically ranging from 10–100 kDa, exhibiting immunomodulatory effects and promoting probiotic proliferation. Alfalfa polysaccharides also have antitumor, antiviral, and anti-aging effects. 4 Vitamins: Rich in β-carotene, vitamin K, vitamin C, and vitamin E. Vitamin K1 content is particularly prominent, reaching 400–600 micrograms per kilogram of dry matter. 5 Minerals: Contains macro and trace elements including calcium, magnesium, potassium, iron, and zinc, with calcium content reaching 1.5%–2.0% (dry basis). 6 Phytosterols: Such as β-sitosterol and campesterol, which can competitively inhibit cholesterol absorption. 7 Proteins and Amino Acids: The mixed hay of alfalfa contains 18.9% crude protein, making it a quality plant protein source. 8 Chlorophyll-related compounds: Impart the natural green color to alfalfa extract, with antioxidant and detoxifying properties.

Alfalfa extract is known as the “natural nutritional treasure trove” and the “multifunctional platform of green plant active components,” occupying a rapidly rising core position in the global dietary supplement, health supplement, cosmetic, feed additive, and pharmaceutical fields. Its most prominent core advantages include: comprehensive and balanced nutritional composition, multiple scientifically validated health benefits, natural origin and high safety, synergistic value across multiple industries, and continuously optimized green extraction processes. 1 Comprehensive and balanced nutritional composition – “natural multivitamin” Alfalfa extract is one of the most nutritionally complete natural plant extracts known, combining plant protein, dietary fiber, vitamins, minerals, flavonoids, saponins, and polysaccharides in a single ingredient. Its calcium content reaches 1.5%–2.0%, and vitamin K1 content is notably high (400–600 micrograms per kilogram of dry matter), making it a valuable natural nutritional fortifier. Alfalfa extract is rich in high-quality crude protein, various B vitamins, vitamin C, vitamin E, and minerals such as calcium, iron, and zinc. 2 Multiple scientifically validated health benefits The health benefits of alfalfa extract have been supported by extensive scientific research. Alfalfa polysaccharides have immunomodulatory, antitumor, antiviral, anti-radiation, and anti-aging effects. Alfalfa flavonoids have immunomodulatory, antioxidant, and anti-inflammatory effects. Alfalfa saponins can reduce serum total cholesterol by approximately 8%–12%, helping to improve cardiovascular health. Alfalfa extract also exhibits weight loss effects—it reduces body weight, decreases body fat mass, and reduces adipocyte size in rats; lipid-lowering effects—it reduces total cholesterol and triglyceride levels; anti-inflammatory effects—it inhibits early tissue inflammation and suppresses late tissue proliferation and granulation formation; diuretic effects—rich in potassium and other minerals, it helps eliminate excess sodium accumulation, promoting the excretion of retained water in the body, benefiting menstrual health and uric acid excretion; and acid-base balance maintenance—as an alkaline food source, it helps balance body acidity and prevent blood acidification. 3 Natural origin and high safety Alfalfa extract is derived from naturally edible Medicago sativa with a long history of safe consumption. Alfalfa has been used as forage and food source globally for thousands of years. Within the recommended dosage range, alfalfa extract has extremely high safety with minimal toxicity. In the cosmetics field, alfalfa extract is widely used in anti-aging and soothing repair products, with use levels typically ranging from 0.5%–2%. 4 Synergistic value across multiple industries The application of alfalfa extract covers multiple high-value fields including dietary supplements, health supplements, cosmetics, feed additives, and pharmaceuticals. In animal feed, alfalfa extract is valued for its nutritional density and palatability, particularly for livestock such as horses and cattle. In cosmetics, alfalfa extract is used in anti-aging and soothing repair skincare products due to its antioxidant and anti-glycation abilities. In health supplements, alfalfa extract is widely used in functional foods, health supplements, and infant formula. 5 Continuously optimized green extraction processes The production process of alfalfa extract has evolved from traditional solvent extraction to advanced technologies including ultrasound-assisted extraction, supercritical CO2 extraction, enzyme-assisted extraction, microwave-assisted extraction, and membrane separation. Green extraction technologies outperform conventional methods in yield and selectivity. Optimized drying and extraction platforms preserve bioactives while improving throughput.