Drug factors: Some chemotherapy drugs such as cyclophosphamide, fluorouracil, bleomycin, actinomycin D, VCR, VDS, colchicine class, Cephalotaxus alkaloids, Ara-C and so on can cause alopecia. Arsenic, metal thallium, selenium poisoning, etc. will also cause severe hair loss.

Nutritional factors: the decrease in food intake can slow hair generation; if reduced protein content in food, even if the normal amount of food may also have inhibited the growth of hair; low-fat or no fat can cause alopecia, but too much ingestion of fat can also sebaceous gland hypertrophy, hyperthyroidism, affecting hair growth. a lack of vitamin A can cause hair to fall off; a lack of vitamin B family pantothenic acid can cause hair to dry and the lack of color. The lack of zinc can cause hair iron The expulsion; the lack of copper can reduce the hair's pigment.pharmaceutical

Autoimmune factors: some studies that autoimmunity in the pathogenesis of alopecia areata play a role in alopecia areata the hair follicle at the lower part of a T-cell infiltration, some patients can be detected in serum autoantibodies such as anti-thyroid, anti-parietal cell antibodies and so on.

Congenital factors: congenital factors such as: developmental defects, various syndromes, such as early as prolonged illness caused by missing or sparse hair completely; follicular dysplasia cause hair valuables easily broken. Congenital alopecia is an autosomal dominant genetic disease, more common in consanguineous marriage of the child-bearing offspring.

Improper care and man-made factors:

1), all day long wearing a hat will be oppressive scalp blood vessels, affecting blood circulation. Especially in the hot summer, hats impede ventilation, the easy to make hair loss a long time;

2), excessive alcohol can cause gastrointestinal diseases, thus affecting the protein, vitamins and other nutrients for digestion and absorption; wine contained in the preservative on the fitness of hair also has a great negative impact.

3), frequent consumption of carbonated drinks for the digestive system a stimulus, causing digestive disorders, affecting the absorption of nutrients caused by hair loss;

4), excessive exercise can also affect the health of hair, there will be soft, silk hair and cause hair loss;

5), a long time to live in air-conditioned room, can cause increased dandruff and alopecia.

Improper hair care and hairdressing

1), with a knife tip easy to damage hair shaved his head, medulla, hair cortex and hair skin, hair, often appear the phenomenon of bifurcation and fracture, especially shaved his head, immediately after the perm, the hair is more harmful. Cut hair with scissors and will not damage the originator, the hair to be healthy to continue to grow;

2), perm, hair properly can damage hair cortex. Perm hair cortex in the water soluble protein and fat, so that softens the hair wavy; hair dye can remove the melanin inside the hair cortex, hair dye and then infiltrated in. Therefore, perming agents, hair dye quality, using the dosage and application method is important, correct and proper use of hair and reduce its harm;

3), excessive use of hair dryer hair damage hair cortex and medulla, so that the hair dry, bifurcation, thinning until the expulsion; pharmacutical clinical contract research projects trade

4), hairbrush and comb select the incorrect method does not correct can damage the hair. Can generate electrostatic interaction of the nylon hair brushes, hair may produce up to hundreds of volts of static electricity from the hair root hair shaft spread to discharge, resulting in pores and the hair root organizations bubbles, Hisayuki, pores and completely loose from the hair root, while the aroused alopecia; wire brushes made of hair brushes with scoparia can damage hair, we should not choose the best choice of rubber or plastic hairbrush or a wooden comb horn;

5), shampoo agent will affect the hair, the improper selection of bodybuilding. Sale of petroleum series of shampoo, hair conditioner, cause damage to the scalp of sebum components, resulting in an increase in dander, dry scalp.Bayer Pharma

(1), endocrine disorders. Experts pointed out that the hair loss and an increase in the male hormone in humans. Another scholar found that patients suffering from thyroid disease, who combined a lot of hair loss, hair loss and thyroid hormones related to that.drugs research contract

(2) mental, neurological disorders. Some young people due to be hit hard, or long-term mental stress, depression, arising from hair loss.

(3) genetic. Family history of hair loss patients accounted for 20%. At the genetic, the right man was autosomal dominant, female showed recessive inheritance, which is hair loss in patients with one of the reasons more men than woman.

(4) the immune dysfunction. contract research organization Clinically found lupus erythematosus, ulcerative colitis and other impaired immune systems are often accompanied by hair loss.

(5) focal infection. Due to fungi, bacteria and viruses cause infection, can lead to local vascular thrombosis occurred or small vessel vasculitis, but the scope of its control hair, due to impeded blood supply arising from hair loss.

(6), improper diet and fat metabolism disorders. Some young men too much like flesh-eating, drinking, when the body can release large amounts of cholesterol when excess sebum, thus affecting the blood supply to hair follicles. Impede normal growth of clinical CRO hair Erzhi hair loss.

(7), renal deficiency, blood deficiency. Chinese medicine, hair loss is deficiency of blood kidney deficiency with the rules.

(8) hair damage. After an investigation of foreign experts pointed out that the long-term use hair dye can appear two to 20 years, the phenomenon of hair loss. In addition, frequent use of hair dryers, tongs, electric heater perm, can also cause hair loss.

At present, the treatment still is no cure for hair loss. In order to contract research prevent hair loss, we must observe the following points:

(1) timely manner the reasons for hair loss.pharmaceutical CRO

(2) attention to nutrition, eat more fruits and vegetables, eat less spicy food.

(3), vitamin B1, B2, B6, injection of B12. For serious hair loss may, under the guidance of doctors, taking hormone drugs.clinical research

(4) The local administration, such as the germinal water, hair regeneration agent.

(5) The use of facial massage, ultraviolet radiation, plum blossom needle, laser treatment for ear and so on.

(6) to strengthen physical activity, while taking Bazhen pills, Shouwu films and so on to fill the stomach nourishing.BD Immunization