Androstenedione, importing from china which is a derivative of cholesterol and endogenous precursor

In 1992, they find that 60% of the products advertised importing from china in the most read sports magazines in the United States, which contain amino acids, did not state which only contained therein [14]. 22% of all advertised products did not state any ingredients. 9% of advertised products indicated the content of the different forms of steroids, whose effects on the human body or health research contractors have not been able to discover, despite a comprehensive review of the medical literature. It was also found that the same dose of the amino acid products of various manufacturers contain from 350 to 40,000 mg of a certain amino acid. Similar findings were also observed for vitamins. Thus, some products are intended for sale to the general contain many specific vitamin that exceeded the value recommended (RDA = Recommended Dietary Allowance) of 25-fold [14]. The problem of safety of food supplements in Europe, especially importing from china vegetable importing from china products of Chinese traditional medicine, it becomes obvious when the 1993 report on the mass poisoning with the preparation of the plants in Belgium, which was contaminated with a toxic plant podraščec (Aristolochia sp.) [11]. Poisoning was manifested with renal failure. Ten poisoned needed a transplant [11]. Extracts from plants containing a large number of compounds, thus demonstrating their quality and identity, as required by law for medicinal products is not easy [11]. Many manufacturers therefore these products are marketed as dietary supplements, which are less accurate [11]. In some cases, they find poisonous importing from china plants, synthetic medicines and heavy metals (lead, mercury and cadmium) [11]. From synthetic drugs in herbal dietary supplements traditional Chinese medicine have found anti-diabetes medicines, analgesics, anti-inflammatories, as well as from the perspective of ephedrine doping problem and metiltetosteron [11]. Some years ago, they have been on the market Slovenian present products which contain importing from china minerals, vitamins, carbohydrates, in addition a "Chinese importing from china herb Ma Huang '. Under this name he hid the plant Ephedra (Ephedra importing from china sinica) importing from china which contains the prohibited substance ephedrine athletes [11]. It was the thermogenic herbal preparation [13], aimed at reducing body weight. These products are not dangerous not only because of the possibility of a positive doping test, but users also dangerous because if the content of ephedrine increase the possibility of a heart attack. importing from china [11]
In 1998, the American public gets the news that Mark McGwire, baseball player with the longest record in the number of strokes the ball in the MLB (Major League Baseball), using androstenedione. The news caused a drastic rise in sales this predhormona (1000%) importing from china [8, 3]. During the three years it has been used for eight percent of American high school athletes [8]. This is empirically confirmed fact shows that top athletes have a real impact on the behavior of young adolescents (which has long been a well know manufacturers of sports equipment) and re terribly confirm why the fight against doping in sport as an important task. "The reason that we are involved in the fight against doping is 52 million American children," was once said of the American Anti-Doping Conference [4]. It is not necessary especially povdarjati that until that moment there was no scientific evidence of safety and efficacy of dietary supplements that contain only [3].
Androstenedione, importing from china which is a derivative of cholesterol and endogenous precursor of testosterone [15], orally importing from china does not increase serum concentrations of testosterone in healthy men [3]. Arrival predhormonov, substances that are metabolized in the body in endogenous hormones and to promote muscle gain on the market has increased since 1994, after he was in the United States adopted a law on food supplements [5]. The first, which in 1996 came on the market, has been dehydroepiandrosterone (ang. DHEA), later followed by many others [5]. Similarly, as well as dehydroepiandrosterone oral androstenedione to suprafizioloških doses (up to 1600 mg) does not work because metabolised in the liver, while that in the chronic use over the enzyme aromatase importing from china and 5α - reductase converts to two hormones, one of which is a female sex hormone estradiol . This means that the oral use of this predhormona user poses a risk to his health [3]. Use predhormonov in athletes classified under doping [10].
Sports importing from china organizations in recent years observed increase in doping positive urine samples [7]. In many cases, importing from china athletes claimed to have been positive in doping test due to the use of food supplements, the producers did not reflect that this only contain prohibited ingredients. Since 1997, the majority of complaints in a positive doping test in American national athletic študenstki relation (National importing from china Collegiate importing from china Athletic Association - NCAA) relied on the use of sports supplements as the reason importing from china for the positive test [7]. In addition, there are strong doubts over purity, content and safety importing from china of food dopa