Standardized Production Process Of Cistanche Tubulosa Extract

Cistanche tubulosa is known as the "desert ginseng" and is a dried fleshy stem of a perennial parasitic herb belonging to the Cistanche family. It is a traditional and precious medicinal herb in China, with a medicinal history of over two thousand years. It grows in the desert Gobi and parasitizes on the roots of desert plants such as Haloxylon ammodendron and Red Willow. It absorbs the essence of the desert and has mild medicinal properties and good nourishing power.

Cistanche tubulosa

Modern research has confirmed that Cistanche tubulosa is rich in various active ingredients such as phenylethanolic glycosides, polysaccharides, flavonoids, alkaloids, etc. However, traditional methods such as boiling and soaking can only extract less than 20% of the active ingredients, and high temperatures can easily damage the core active substances. The extract of Cistanche tubulosa is extracted through modern refined extraction technology, removing impurities, enriching effective ingredients, and locking in active nutrients, greatly improving utilization and efficacy value. It is widely used in health food, dietary supplements, medicine, and skincare fields. This article will fully dismantle the standardized production process of Cistanche tubulosa extract and comprehensively explain its core efficacy based on scientific research data, providing a reference for related applications and research.

Main Chemical Constituents of Cistanche tubulosa

Standardized production process of Cistanche tubulosa extract

The preparation process of Cistanche tubulosa extract has gone through traditional boiling and alcohol extraction iterations, and has now formed a standardized industrial process of "raw material selection pretreatment multi-stage extraction separation and purification concentration and drying finished product quality inspection". The mainstream is divided into two core processes: water extraction and ethanol reflux extraction, supplemented by ultrasound-assisted and macroporous resin purification technologies, balancing extraction rate and integrity of active ingredients, strictly controlling parameters throughout the process, and ensuring stable product quality.

Cistanche tubulosa experiment

(1) Raw material selection and initial processing

The quality of raw materials directly determines the efficacy of extracts and is the primary core link in production. Industrial production prioritizes the use of desert Cistanche tubulosa grown in the Gobi Desert production areas of Inner Mongolia and Xinjiang for more than 5 years. This production area has a large temperature difference between day and night, no pollution, and the highest accumulation of active ingredients in the plants. The harvesting period is concentrated in the spring and autumn seasons, during which the content of core components such as paeoniflorin and verbascoside in Cistanche tubulosa reaches its peak. After harvesting, remove inferior plants with mold, insect infestation, and severe fibrosis, and retain high-quality stems with plump flesh and brown color.

Subsequently, preliminary drying and trimming are carried out to remove surface impurities such as sediment and scales, and low-temperature air drying is used instead of exposure to sunlight to avoid high-temperature oxidation, damaging the active ingredients. After cleaning, cut the raw materials into uniform thick pieces and send them to a pulverizer for crushing. Control the particle size of the pulverizer to be between 20 and 80 mesh. Coarse particle size can lead to insufficient extraction, and excessive particle size can easily cause filter blockage and impurity mixing, affecting the subsequent purification effect.

desert living cistanche

(2) Raw material pretreatment activation

The crushed Cistanche tubulosa powder needs to be pre-treated and activated to break down the structure of plant cell walls and improve the dissolution rate of active ingredients. Firstly, a low-temperature wetting process is adopted, in which purified water is added and soaked at a constant temperature for 30-60 minutes to fully absorb water and expand the powder, softening the fiber tissue. For some high-end products, composite enzymatic pretreatment technology will be used to decompose ineffective cell wall components such as plant cellulose and pectin in a mild pH environment, greatly improving the extraction efficiency of active substances such as phenylethanolic glycosides and polysaccharides without damaging the activity of the ingredients. Compared with traditional processes, the yield of effective ingredients can be increased by more than 15%. After preprocessing is completed, drain excess water and set aside for extraction.

Cistanche tubulosa

(3) Multi-stage extraction (core extraction stage)

At present, the mainstream extraction processes in industry are divided into water extraction methods and ethanol reflux extraction methods, which can be flexibly selected according to the product application, and assisted by ultrasound and microwave-assisted technology to optimize the extraction effect.

The water extraction method is suitable for food-grade and ordinary dietary supplement extracts, with high safety and no solvent residue. The standardized parameters are a solid-liquid ratio of 1:12g/mL, constant temperature decoction for 140 minutes, and repeated extraction 4 times. Under these process conditions, the yield of the extract can reach 65.83% ± 0.87%. Through multiple segmented decoctions, hydrophilic active ingredients such as polysaccharides, amino acids, and water-soluble flavonoids from Cistanche tubulosa are fully dissolved. The entire process is controlled at low temperatures to avoid degradation of active ingredients caused by high temperatures.

The ethanol reflux extraction method is commonly used for pharmaceutical-grade, high-purity functional extracts to selectively enrich lipophilic core active ingredients. Select an ethanol solution with a volume fraction of 50% -70%, and control the solid-liquid ratio of Cistanche tubulosa to ethanol solution at 1:5-1:12. Extract 1-3 times using the heating reflux method, each time lasting 1-3 hours. This process can efficiently extract the core functional components of phenylethanolic glycosides, such as echinacoside and verbascoside, with extraction purity far higher than that of water extraction, making it the preferred process for highly active extracts. Some production lines will be equipped with ultrasound-assisted extraction, utilizing the cavitation effect of ultrasound to break down cells, shorten extraction time, and improve extraction uniformity.

Cistanche tubulosa extract

(4) Filtration and centrifugation for impurity removal

The extracted mixture contains ineffective components such as plant fibers, residues, suspended impurities, etc., and needs to be purified through multi-stage filtration. Firstly, a 100 mesh filter is used for coarse filtration to remove large solid residues, and all extraction filtrates are combined. Subsequently, it is sent to a high-speed centrifuge and centrifuged at a speed of 4000r/min to thoroughly remove fine suspended impurities and insoluble precipitates, obtaining a clear and transparent primary extraction solution. This step can effectively remove invalid impurities, reduce the burden of subsequent concentration, and avoid the accumulation of impurities that affect product purity and stability.

(5) Fine purification of macroporous resin

Purification is a key step in improving the purity and efficacy of extracts, and industrial D101 macroporous adsorption resin is used for fine separation. Soak the resin in 95% ethanol for 24 hours in advance to fully swell, rinse until there is no turbidity or alcohol odor, and then set it aside. The clarified extract after centrifugation is uniformly passed through a resin column, and the adsorption properties of the resin are utilized to accurately intercept active ingredients such as total glycosides and phenylethanolic glycosides in Cistanche tubulosa.

The purification process adopts a segmented elution technique: first, wash with 1-2 times the column volume of purified water to remove water-soluble impurities such as sugars, inorganic salts, and oligosaccharides; Wash with a 50% -70% ethanol solution that is 1-3 times the volume of the column, and accurately collect the ethanol elution solution rich in core active ingredients. After purification by this process, the content of pineal glycoside in the extract can reach over 21.51%, and the purity of the active ingredient is greatly improved. At the same time, ineffective and redundant components are removed, making the efficacy more targeted.

Cistanche tubulosa extract

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(6) Reduced pressure concentration and low-temperature drying

The collected high-purity eluent needs to be concentrated using low-temperature vacuum concentration technology to control the vacuum degree and temperature, avoiding high-temperature damage to the active ingredients. The eluent should be concentrated to a thick paste with a density of 0.95-1.10 g/cm ³, maximizing the retention of effective ingredients. After concentration is completed, choose the drying method according to the product form requirements: the powdered extract adopts vacuum freeze-drying technology, low-temperature locking, and fully retains the thermosensitive active substances; Direct aseptic filling of paste-like products. The finished extract obtained after drying has highly enriched active ingredients, extremely low impurity content, stable properties, and easy storage.

(7) Finished product testing and aseptic packaging

The finished product needs to go through multiple quality inspection processes, strictly testing the content of active ingredients, solvent residues, heavy metals, and microbial indicators to ensure compliance with the standards of medicinal and edible products. Focus on detecting the content of core components such as echinacoside, verbascoside, total polysaccharides, and total flavonoids, while investigating issues such as ethanol residue, bacterial colonies, and excessive heavy metals. After passing the quality inspection, it is packaged, sealed, and sealed in a sterile clean room to obtain standardized Cistanche tubulosa extract products.

Chengdu Wecistanche Bio-tech Co., Ltd- Cistanche tubulosa extract factory