Bird knotweed properties. Knotweed grass - medicinal properties, uses and contraindications. Knotweed grass: medicinal properties and contraindications

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Hi all! I continue to introduce you to useful, medicinal herbs. Today I present Sporysh.

So, let's begin!

Bird's knotweed, popularly known by other names as trampling grass, knotweed, is a herbaceous annual plant from the buckwheat family.

Stem up to 60 cm, ascending or recumbent, branches from the base. The leaves are alternate, small, lanceolate or elliptical. The flowers are small, white or pink, five-membered, located in the axils in 1-5 pieces.

Knotweed seeds are a dark brown, matte, triangular nut. Flowering occurs from June to October.

Knotweed grows in trampled fields, along river banks, paths and roads. Distributed everywhere except the Arctic and Antarctica.

For treatment, the herb Knotweed (knotweed), harvested during flowering, is used.

Collect raw materials by cutting the plants with a knife or tearing them off with your hands (the above-ground part), dry them by spreading them thin layer in the shade. Stored without direct access sun rays in fabric bags.

The shelf life of dried raw materials is up to three years.

Knotweed - medicinal properties and contraindications.

IN traditional medicine The diuretic, restorative, astringent, antiseptic and hemostatic properties of bird knotweed are known.

Plant decoction:

  • good diuretic
  • removes excess salt ions,
  • stimulates smooth muscle contractions,
  • improves filtration in the renal glomeruli.

Thanks to high content silicic acids, a decoction of knotweed, when used systematically, promotes the gradual softening of stones in gallbladder and kidneys. After softening, the stones in the form of sand are painlessly released through the urinary ducts.

Knotweed grass treatment:

Knotweed herb is used alone or as part of various herbal infusions. As part of the preparations it is used in treatment pulmonary diseases, tuberculosis, stomach diseases, oncology.

Use of knotweed.

For kidney diseases, knotweed herb is taken as a decoction.

Preparation of the decoction: ratio of 1 part raw material to 10 parts water. Boil for 15 minutes. It is not advisable to eat before drinking knotweed.

The decoction is consumed on an empty stomach, 1 tbsp. spoon. It is recommended to drink the decoction 3-4 times a day. To remove kidney stones, a decoction of knotweed is used in combination with antispasmodics.

Knotweed is believed to help with infertility.

  • To treat infertility, make a decoction of dry or fresh plants: boil in a water bath for 15-20 minutes. The ratio is maintained as for the treatment of kidney diseases. Leave for 45 minutes. After filtering, take 2 tbsp on an empty stomach. spoons three times a day.
  • To treat infertility, bird knotweed herb can be brewed as tea: a tablespoon of raw material in a glass of boiling water, infused for about half an hour. This infusion can be drunk without restrictions.

Knotweed is used to improve hair condition and eliminate dandruff. To do this, rinse your hair with the decoction. This procedure strengthens the hair, gives it shine and reduces hair loss.

For hemorrhoids, knotweed seeds are ground to a powder, honey is added in a 1:1 ratio, and 1 tbsp is drunk. spoon on an empty stomach. It is recommended to consume this mixture three times a day.

Knotweed is also used for weight loss.

These properties determine the possibility of its use for acceleration. It is the correction of metabolism that ultimately allows you to lose weight. How to use knotweed for weight loss: aid, together with diet.

Due to the fact that knotweed herb is completely non-toxic, it can be used even for chronic diseases.

Knotweed herb contraindications.

Like any medicine, knotweed herb has contraindications dictated by its natural properties.

  • Since knotweed decoction helps increase blood clotting, you should drink it with caution if you are prone to thrombophlebitis.
  • Treatment with this herb is contraindicated in inflammatory diseases kidneys and bladder.
  • Treatment with knotweed is not recommended for people who have had a heart attack or, elderly people, patients with angina pectoris, and pregnant women.
  • Eating birdweed during pregnancy can cause miscarriage.

In addition to the fact that knotweed has long been used as a medicinal plant, it can be used to cook cabbage soup and soups. IN fresh together with other greens it is used in very healthy vitamin salads.

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Be healthy!!!

Bird's knotweed - Polygonum aviculare L.

Buckwheat family - Polygonaceae

Other names:
- knotweed
- bird's buckwheat
- gooseneck
- chicken beetle
- ant-grass
- stomper

Botanical characteristics. Annual low growing herbaceous plant with a stem strongly branched from the base or recumbent. The leaves are elliptical in shape, entire, alternate, small, attached to white bells. The flowers are also small, without inflorescences, and sit several in the axils of the leaves. The fruit is a nut. Blooms from July to late autumn.

Spreading. Ubiquitous.

Habitat. In fields, vegetable gardens, along roads, pastures, on riverine sands, in populated areas(popularly called “goose grass”). Grows like a weed.

Harvesting, primary processing and drying. Knotweed is harvested during flowering, in dry weather. When collecting, its grass is cut off with a knife or sickle, and in case of dense standing, the upper parts of plants up to 40 cm long are mowed down with scythes. It is not recommended to collect raw materials in areas of livestock grazing and near dwellings, in heavily polluted places, near industrial enterprises and highways.

Dry in attics with good ventilation, under awnings or on outdoors in the shade, spread out in a thin layer. During drying, the grass is turned over 1-2 times. When drying in artificially heated dryers, the temperature should not exceed 40-50°C.

Standardization. The quality of raw materials is regulated by the requirements of the Global Fund XI, Amendment. 1.

External signs.Whole raw materials. Whole or partially crushed leafy shoots up to 40 cm long. Stems are thin, branched, geniculate. The leaves are alternate, from broadly elliptical to almost linear, up to 3 cm long, up to 1 cm wide. Characteristic is the presence of membranous bells of a silvery-white color at the base of the leaves. Flowers are axillary, 1-5, with a simple, deeply incised perianth, white or pink color. The smell is weak. The taste is slightly astringent.

Crushed raw materials. Pieces of stems, leaves and flowers various shapes passing through a sieve with holes with a diameter of 7 mm. The color is grayish green.

Microscopy. When examining the leaf from the surface, epidermal cells with straight, thickened walls, often with brown contents, are visible; the walls of the cells of the upper epidermis are often clearly thickened. The stomata are often surrounded by three parastomatal cells (anisocytic type). Characteristic is the presence of a large number of calcium oxalate drusen and mechanical fibers with a sinuous contour and thick sheaths located above the veins and along the edge of the leaf blade.

Numerical indicators.Whole raw materials. Humidity no more than 13%; total ash no more than 13%; browned and blackened parts of grass no more than 3%; roots no more than 2%; organic and mineral impurities no more than 2%.

Crushed raw materials. Humidity no more than 13%; total ash no more than 13%; particles that do not pass through a sieve with holes with a diameter of 7 mm, no more than 10%; particles passing through a sieve with holes measuring 0.5 mm, no more than 10%.

The quality of raw materials is also assessed based on the results of qualitative and quantitative analyzes. In this case, flavonoids are detected in a 70% alcohol extract by a yellow-green color in reaction with aluminum chloride. Determined by the spectrophotometric method, the content of the total flavonoids in terms of avicularin should be at least 0.5%.

Chemical composition. Grass contains tannins, flavonol glycoside avicularin, not less than 0.5% according to GF XI, ascorbic acid up to 900 mg% (on absolute dry weight), vitamin K, carotene (39 mg%), silicic acid compounds (4.5%), tannins , carotene, essential oil(traces). Flavones are found in knotweed flowers, and anthraquinones are found in the roots.

Storage. In dry, well-ventilated areas, packed in bales. Shelf life: 2 years.

Pharmacological properties. Antique folk remedy, introduced in scientific medicine as a hemostatic, as well as for urolithiasis. Knotweed is astringent and diuretic, anti-inflammatory and antimicrobial effect due to tannins.

In animal experiments, aqueous extracts from knotweed herb increase blood clotting, enhance uterine contractions, increase diuresis, and have astringent properties.

Avicularin glycoside increases the rate of blood clotting in rabbits without changing blood viscosity, and has a tonic effect on the muscles of the uterus.

Galenic forms of the plant have an astringent, hemostatic, anti-inflammatory and antimicrobial effect, protecting the mucous membranes gastrointestinal tract from irritating influences. Thanks to the presence of provitamin A, it improves functional state epithelium of the mucous membranes of the gastrointestinal tract; tannins, vitamin K and bioflavonoids reduce permeability vascular walls, normalize the processes of absorption and exudation in the intestines.

Silicic acid salts promote the binding of various toxic substances endogenous and exogenous origin, removing them from the body. In case of uric acid diathesis, they promote the excretion of stone-forming salts in the urine.

Infusions of knotweed increase diuresis, reducing the reabsorption of sodium and chlorine, which increases the excretion of water.

Silicic acid promotes compaction, petrification of tuberculosis lesions and their faster healing. In this case, the hemostatic properties of knotweed are also taken into account.

Medicines. Knotweed herb, infusion, collection by M. N. Zdrenko.

Application. Galenic preparations of knotweed are used as an anti-inflammatory, diuretic and stone-promoting agent for urolithiasis, as a hemostatic for hematuria, and also used in postoperative period after removal of stones for anti-relapse treatment.

Infusions and decoctions of knotweed are used for tuberculosis of the kidneys and lungs, for bleeding after abortion, childbirth, due to uterine fibroids, chronic inflammatory diseases, for juvenile and menopausal hypermenorrhea.

In the form of a decoction or infusion for rinsing, it is used for inflammation of the oral mucosa and angular cheilitis, and for gingivitis in the form of applications.

Used as a general strengthening and tonic. Used in modern homeopathy. Exported abroad.

An infusion of knotweed is prepared from the herb in a raw material to extractor ratio of 1:10. The herb is crushed, placed in an enamel bowl, poured boiling water, placed in a boiling water bath for 5-10 minutes, remove and leave to stand for 1-2 hours, filter, take 1 tablespoon 3-4 times a day.

Water infusions are used in the treatment of gastritis and peptic ulcer stomach, disorder salt metabolism. At skin diseases For children, knotweed baths are recommended. The collection of M. N. Zdrenko is used as symptomatic remedy for malignant tumors.

Knotweed or knotweed is an annual herbaceous medicinal plant of the buckwheat family with branched stems reaching up to 60 cm in length, with small grayish-green elongated oval leaves.


Knotweed blooms from April to autumn; the flowers are inconspicuous, small, greenish-white or pink. The seeds are black or brown, city birds, pigeons, and sparrows happily eat knotweed seeds - that is why another name for this plant is knotweed. And people call this plant ant grass, goose grass, and bird's buckwheat.

Knotweed is found everywhere, growing like a weed, lining vacant lots, roadsides, near paths and even on the paths themselves, in courtyards, on sports fields with a soft carpet, it is resistant to trampling, and grows quickly on any soil.

Chemical composition of knotweed

Knotweed is a common plant and people consider it a harmful weed, but in fact it is a useful, wonderful plant that helps a person fight various diseases.

This herb contains many useful substances, which have a beneficial effect on the body. Knotweed is rich in vitamins C, K, E, carotene, minerals - calcium, magnesium, copper, silver, manganese, carbohydrates - fructose, glucose and sucrose. Its greens contain pectin, which removes poisons and harmful metals from the body. Knotweed improves blood condition, as it contains a lot of iron. It has the ability to soften and remove stones, since knotweed is rich in silicon. It also contains flavonoids, alkaloids, astringents and essential oils.

Medicinal properties and uses of knotweed


Knotweed has been used for treatment since ancient times. various diseases, since this plant has many beneficial properties. The upper, soft parts of the plant are used for treatment; hardened, hard stems will not be of any use. The grass is dried and decoctions and infusions are prepared from it.


The knotweed is part of many medicinal fees, drugs. Fresh grass juice is strong remedy To strengthen the body, three spoons of juice a day is enough and you will forget about illnesses. Freshly squeezed juice is used to treat abscesses and ulcers.

IN folk medicine it is used to remove sand and stones from the bladder and kidneys; knotweed effectively dissolves stones to the state of fine sand, and the process occurs painlessly.

Knotweed is also used for cleansing. bile ducts, for the treatment of the liver, stomach and intestines, for peptic ulcers duodenum, for hemorrhoids.

Knotweed preparations remove sodium and chlorine from the body and prevent crystallization mineral salts in the urinary system.

This simple herb helps cure infertility in both women and men. Treats gynecological diseases, causes uterine contractions, relieves inflammation, is used for bleeding, long periods, alleviates conditions with uterine fibroids. A decoction of knotweed is used for douching when inflammatory processes appendages.



Knotweed is included in medicines, which are used to normalize sexual function in men.

Improves blood condition and is widely used to treat anemia and anemia.

Increases breathing amplitude and lung volume, increases immunity and appetite, promotes weight gain and is used to treat patients with tuberculosis.

Knotweed is used for poisoning by poisons and harmful metals, such as arsenic. Used to cleanse the body of toxins and excess fat.

Knotweed has anti-inflammatory and antimicrobial properties. Gargle with infusion for inflammation of the upper respiratory tract and oral cavity, used to cleanse the skin when purulent wounds and inflammation. Apply lotions to fresh wounds and ulcers.

Birdweed is also used as an anthelmintic.

This plant can also be used as food, since the young stems contain proteins and vitamins. The stems can be added to salads, side dishes, even as a filling for pies.

Knotweed is used to produce dyes for fabrics and leather; blue dye is made from the root, and green and yellow dye is made from the leaves.

Contraindications to the use of knotweed

Like most medicinal plants knotweed has contraindications for use and, just like any medicine, it should be taken only after consulting a doctor!
To people old age For patients with angina pectoris, after a stroke or heart attack, it is not advisable to use knotweed for treatment.

Contraindications for use are low blood pressure and a tendency to form blood clots.

And also a contraindication for use is individual intolerance plants.

Traditional methods of treating knotweed


In folk medicine, knotweed grass is used to treat and prevent many diseases. Tinctures, infusions, and decoctions are prepared from the herb, used internally for illnesses, and used to rinse the mouth and throat.



Externally - make lotions on wounds and abscesses, for hemorrhoids, add to children's baths as a sedative.

Fresh grass and juice are used to treat skin problems - to heal wounds, ulcers, acne and boils.

Knotweed is used for better growth and against hair loss.

In this article we have selected simple ones for you folk recipes that will help you strengthen your health, improve your well-being and stay cheerful and beautiful.

Knotweed infusion for removing stones

Recipe No. 1

Pour 1 tablespoon of dry raw material into one glass of boiling water, cover with a lid and leave for 30 minutes. The infusion should be filtered and taken three times a day, a tablespoon.

Recipe No. 2

Pour 2 tablespoons of dry herb into a glass hot water and leave for 12 hours. Strain, take a quarter glass of infusion four times a day 10 minutes before meals, adding a little lemon juice to the infusion.



At the same time as taking the infusion to remove stones, you should take a diuretic and drink plenty of fluids.

Infusion recipe for liver, kidney and stone diseases

Pour 1 glass of dry herb with one liter of hot water, wrap and leave for 2 hours. Strain and take a quarter glass 3 times a day before meals. Store the infusion in the refrigerator for no more than 2 days.

Infusion recipe for treating anemia

Pour 1 tablespoon of dry knotweed herb into 1 glass of boiling water, close the lid and leave for 1 hour, then strain the infusion and mix with one glass of beet juice. Take 1 tablespoon three times a day 10 minutes before meals. The course of treatment is 2 months.

Infusion recipe for cystitis

Pour 20 grams of herb into 1 glass of boiling water, wrap and leave for two hours. Strain and drink three times a day.

Infusion for the treatment of infertility

Recipe No. 1

Dried grass Crush knotweed into powder, take 2 tablespoons of powder, brew 600 ml of boiling water and leave to brew until morning. Treatment should begin seven days after menstruation, take 200 ml three times a day 5 minutes before meals. Do not treat during menstruation.

Recipe No. 2

Pour 1 glass of dry or fresh herb with 1 liter of boiling water and leave for 5 minutes. Strain and drink throughout the day, instead of other drinks.

Knotweed infusion for obesity

2 tablespoons of crushed knotweed herb, 1 tablespoon of crushed birch leaves, mix, take 1 tablespoon of raw materials and pour 1 glass of boiling water. Infuse, strain the cooled infusion. Take a third of a glass 15 minutes before meals.

Infusion for relieving fatigue

Pour 1 tablespoon of chopped herbs into one glass of hot water, wrap and leave for 30 minutes. Strain the infusion and take 2 tablespoons 3 times a day before meals. The course of treatment is 2-3 weeks.

Infusion for the treatment of periodontal disease

Pour 3 tablespoons of fresh herbs into 1 glass of boiling water, strain after an hour. Soak a cotton swab in the infusion and apply to the gums three times a day, as well as rinse the mouth. After the procedure, drink 1 tablespoon of infusion.

Knotweed decoction for pulmonary tuberculosis

Mix dry herbs and crushed licorice root in equal quantities, take 3 tablespoons of the raw material, pour in 0.5 liters of hot water and boil over low heat for 5 minutes. Leave for 30 minutes, strain the broth and drink during the day in 5-6 doses.

Recipe alcohol tincture knotweed for the treatment of liver and cholelithiasis

Pour 2 teaspoons of dry herb into 200 ml of alcohol and leave for ten days. Then strain the tincture. Add 15-20 drops of tincture to half a glass of water, apply as choleretic agent three times a day.

Hair loss remedy

The name of this grass was given by Slavic farmers. They noticed that it recovers extremely quickly, “fast” after weeding in the garden. The amazing regenerating properties of the weed plant were also noticed by healers. At first, knotweed was used to treat wounds, and then they began to be used internally - for colds, kidney diseases, digestive tract, rheumatism and infertility.

The botanical name of the herbaceous annual is Polygonum aviculare. People have many names - ant, dog pepper, serpentine, and also bird knotweed, since small birds feed on the seeds of the plant.

Grass shoots appear in late May-early June. Flexible, geniculate stems from 30 to 100 cm long grow from the taproot rhizome. They rise slightly above the ground, and more often spread along its surface.

The leaves of knotweed are elongated, rounded at the top, and light green in color. They are attached to the stems with short petioles, gathering in bunches of 3-4 pieces.

From June until the end of summer, bird's-eye knotweed blooms with small greenish-white flowers that form inflorescences at the base of the leaves. Dark triangular nuts are formed from them.

Where does knotweed grow?

The plant is classified as cosmopolitan - a species that grows in most countries globe. Like many weeds, bird knotweed is unpretentious climatic conditions, soil and humidity. It is found in all regions of Russia, except for the polar territories.

Knotweed can be found in wastelands, gardens, fields and along river banks. For medicinal purposes, it is not recommended to collect grass along the roads - it can be contaminated with car exhaust.

Scientific research shows that the plant is rich in active biological compounds - ascorbic acid, carotene, vitamins E and K. The composition includes a number of other useful substances, including:

  • Hyperoside. This flavonoid is calming nervous system, strengthens the heart muscle, lowers blood pressure.
  • Quercitrin. Removes manifestations, breaks down bad cholesterol, reduces the size of tumors.
  • Isoquercitrin. Prevents early cell aging.
  • Avicularin. Increases the elasticity of blood vessels, removes toxins, stops bleeding.
  • Terpenes. They have diuretic, bactericidal and antiviral properties.
  • Silicic acid compounds. They accelerate the synthesis of healthy cells, participate in metabolism and the construction of bone tissue.
  • Essential oils. Destroy germs and viruses, eliminate inflammation and swelling.
  • Organic slimes. Promote the removal of phlegm, envelop, heal tissue damage.


Use of knotweed in folk medicine

A rich combination of bioactive substances gives the plant many healing properties. His drugs relieve inflammation in internal organs, drive bile and urine, promote the removal of stones from the kidneys and bladder. Knotweed is used for respiratory diseases as an expectorant and emollient.

The silicic acid contained in the herb accelerates the healing process of wounds and burns, and tannins cleanse the wound surface from pyogenic infection. Avicularin stops uterine bleeding after childbirth and abortion.

Juice, decoctions, water and alcohol infusions knotweed is effective against the following diseases:

  • dysentery;
  • stomach ulcer;
  • hepatitis;
  • cholecystitis;
  • colitis;
  • cystitis;
  • nephritis;
  • urethritis;
  • tracheitis;
  • pleurisy;
  • pneumonia;
  • bronchial asthma;
  • stomatitis.

Knotweed for infertility (for conception), reviews

Russian healers traditionally advised infertile people married couples healing tea from bird knotweed. The daily portion of the product is prepared from 1 glass of dried herbs and a liter of boiling water. The ingredients are mixed in a glass container and left for half an hour, wrapped in a towel.

The strained liquid is drunk throughout the day, replacing coffee and tea with it. Reception does not depend on female cycle, and can last from 1 to 4 months.

The second option for a means of conception is a collection of 1 teaspoon of bird knotweed and 2 tbsp. spoons of sage. The herbs are placed in a jar, poured with 0.5 liters of hot water (+60ᵒ C) and placed in a pan of water. Boil for 15 minutes, then leave covered until cool.

Drink the decoction three times a day, half a glass, 15 minutes before meals. Reception begins a week before ovulation and continues throughout the menstrual cycle.

Reviews from women report that consuming knotweed leads to conception even with a diagnosis of “secondary infertility.” The product also helps regulate ovulation and eliminate pain during menstruation. For more effective result It is recommended that the future father also drink herbal tea.

Important! If you suspect pregnancy, you should stop taking the drug. Bird knotweed actively stimulates the muscles of the uterus and can cause miscarriage.

What else does knotweed help with?

The plant has powerful anticonvulsant properties. Its drugs relieve convulsions caused by an imbalance of calcium and magnesium, for example, with rickets, dehydration, and vitamin deficiencies. In such situations use milk decoction knotweed.

To prepare the product, place 2 teaspoons of herbs and a glass of milk in a saucepan. Boil for 3 minutes over low heat, cool to +40ᵒ C and pass through a strainer. Drink warm 1-2 times a day until the cramps stop.

The silicon compounds contained in knotweed stop itchy skin for urticaria and insect bites. The fresh plant is ground in a mortar until a thick puree is formed. Spread it on double-folded gauze and apply to the affected areas of the skin.

Plant flavonoids activate metabolism, which accelerates the effect of weight loss diets. Dried grass is mixed in equal proportions with corn silk and crushed fruits. Place 1 tbsp. spoon the resulting mixture into a thermos, add a glass of boiling water and leave overnight.

The next morning, filter the composition, divide into 3 parts and drink 15 minutes before meals. After 10 days of use, take a break for 10 days, then repeat the course. The product provides weight loss of 4-6 kg per month, subject to diet.

For cooking medicines applies upper part knotweed stems with leaves - approximately 40 cm from the top. The raw materials are collected from June to August and used fresh or dried.

For diseases of the digestive tract and gall bladder, remedies from the root of the plant are used. Treated with powder made from crushed knotweed seeds.

Take 100 g of each product and grind it in a coffee grinder. 1 tbsp. A spoonful of the resulting powder is mixed with 2 glasses of water and simmered over low heat for 5 minutes. Leave for 1 hour, then filter and add 4 tbsp. spoons of knotweed juice.

Take 0.5 cups four times a day before meals. Use for 2 months, then do a monthly interval. The course is repeated three times.

Tincture

For long-term treatment chronic diseases Alcohol essences of the plant are more effective. For example, vodka tincture helps with gallstones. To prepare it, place 1 tbsp in a glass jar. spoon of dry knotweed herb, add 2 glasses of vodka and put it in a closed cupboard for 10 days.

The finished preparation is passed through a strainer. Use before meals, three times a day, 20 drops, diluted in 0.5 cups warm water. The dosage regimen is as follows - 1 month, then a month's break and a repeat course.

The ingredients are placed in a glass container and kept in the dark for a week. Then pour into a saucepan and boil for 3 minutes over low heat. The cooled tincture is filtered. Drink warm, 0.5 cups every 4 hours, until diarrhea stops completely.

Another version of the tincture is used when chronic gastritis, pancreatitis, stomach ulcer. In a glass container, combine 100 g of dried knotweed and 1 liter of high-quality vodka. The composition is placed in a warm place for a day, then passed through a strainer.

Take 20 drops mixed with water before each meal. Minimum course - 1 month.

Important! Alcohol preparations of knotweed cannot be used during exacerbation of chronic diseases - they create unnecessary stress on diseased organs.

Contraindications

The hemostatic properties of bird knotweed may prove dangerous for people suffering from thrombophlebitis. By thickening the blood, the plant increases the risk of blockage of diseased blood vessels.

Patients who have been diagnosed with large stones in the kidneys, gall bladder and bladder should not get carried away with knotweed preparations. Herbal remedies actively expel stones, which often leads to blockage of the ducts. Decoctions of the plant are suitable only for removing small stones.

Poultry knotweed products are rich in tannins that strengthen the intestines. Therefore, they are not recommended for chronic constipation.

The plant is strictly contraindicated for pregnant women, as it causes increased uterine tone. Nursing mothers are also not advised to be treated with knotweed, since the effect of the herb on the health of the baby has not been sufficiently studied.