http___www.tekstovi.org_l-arginin-ima-blagotvoran-ucinak-na-organizam__1.xml
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What is L-Arginine? L-arginine is an amino acid that has numerous functions in the body. It helps the body get rid of ammonia (a waste product), is used to make compounds in the body such creatine, L-glutamate, and L-proline, and can be converted to glucose and glycogen if needed. L-arginine is used to make the nitric oxide, a compound in the body that relaxes blood vessels. Preliminary studies have found that L-arginine may help with conditions that improve when blood vessels are relaxed (called vasodilation), such as atherosclerosis, erectile dysfunction, and intermittent claudication. L-arginine is also involved in protein formation. In larger amounts, L-arginine stimulates the release of hormones growth hormone and prolactin. Why Do People Use L-Arginine? Heart diseaseIn the body, L-arginine is used to make nitric oxide, which reduces blood vessel stiffness, increases blood flow, and improves blood vessel function. However, L-arginine should not be used following a heart attack. An study sponsored by the National Institutes of Health examining the use of L-arginine after a heart attack was terminated early after six patients died, a disproportionate number. There were no deaths in the patients who did not receive L-arginine. The study researchers speculate that L-arginine may aggravate the effects of cardiac shock. The results were published in the Journal of the American Medical Association. Erectile DysfunctionL-arginine has been used for erectile dysfunction. Like the drug sildenafil citrate (Viagra), L-arginine is thought to enhance the action of nitric oxide, which relaxes muscles surrounding blood vessels supplying the penis. As a result, blood vessels in the penis dilate, increasing blood flow, which helps maintain an erection. The difference in how they work is that Viagra blocks an enzyme called PDE5 which destroys nitric oxide and L-arginine is used to make nitric oxide. In one study, 50 men with erectile dysfunction took either 5 grams of L-arginine per day or a placebo. After six weeks, more men in the L-arginine group had an improvement compared to those taking the placebo. Unlike Viagra, L-arginine must be taken daily. Wound healingL-arginine's possible activity in wound repair may be due to its role in the formation of L-proline, an important amino acid that is essential for the synthesis of collagen. Other ConditionsL-arginine is also used for high blood pressure, migraines, sexual dysfunction in women, intermittent claudication, and interstitial cystitis. Sources of L-ArginineL-arginine is conditionally essential, which means that the body normally has enough. It's produced in the kidney and to a lesser extent, in the liver. Food sources of L-arginine include plant and animal proteins, such as dairy products, meat, poultry, fish, and nuts. The ratio of L-arginine to lysine is also important - soy and other plant proteins have more L-arginine than animal sources of protein. Severe burns, infections, and injuries can deplete the body's supply of arginine. Under these conditions, L-arginine becomes essential and it is necessary to ensure proper intake to meet the increased demands. L-arginine is also essential for children with rare genetic disorders that impair the formation of L-arginine.
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L-arginin ima blagotvoran učinak na organizam L-arginin potreban je tijelu za poboljšanje fizičkih sposobnosti. Po svojoj strukturi spada u aminokiseline. Dobiva se iz hrane, a najviše ga ima u mliječnim proizvodima, mesu, ribi, orasima, itd. Osim iz hrane, može se uzimati i kao suplement koji je dostupan u obliku kapsula, tableta ili praha. Preporuka je ne uzimati više od dva puta dnevno po 1500 mg L-arginina. Na taj način ćete unijeti dovoljnu količinu koja je potrebna da se aktiviraju sve njegove pozitivne funkcije koje ima na organizam. Djelovanje na organizam L-arginin vrlo je cijenjeni suplement među vježbačima u teretani. Zaslužan je za povećanje razine dušikovog oksida u krvi. To za posljedicu ima širenje krvnih žila, čime se povećava dotok krvi i kisika u žile. Zbog toga organizam postaje izdržljiviji pa vježbači mogu duže i intezivnije vježbati zbog čega će prije dođi do povećanja rasta mišića. L-arginin se često reklamira i kao seksualno pomagalo. Naime, zbog većeg dotoka krvi u penis za što je on zaslužan, pomaže u zadržavanju erekcije. Rezultati raznih neovisnih istraživanja su to i potvrdili. Starije osobe svakako bi trebale razmisliti o redovitom uzimanju ovog suplementa. Naime, on pomaže u očuvanju mišićne mase koju je inače starijim osobama teško održavati. Također, smanjuje i razinu kolesterola i snižava krvni tlak što su česti zdravstveni problemi kod osoba starije životne dobi. L-arginin će pomoći i prilikom bržeg zacjeljivanja rana. Mogući štetni učinci Iako se posvuda mogu pronaći pozitivne stvari napisane o blagotvornim učincima koje L-arginin ima na naš organizam, treba biti oprezan s količinama koje se uzimaju. L-arginin povećava hormon rasta što ima odličan učinak na mišiće. No, uzimanje puno većih količina od preporučene može dovesti i do neželjenih posljedica, odnosno može stimulirati rast tumora. Istraživanja su se provodila na životinjama, ali rezultati nisu uvijek bili isti. Neki put su veće količine L-arginina povećale rast tumora, ali u nekim slučajevima nije došlo do tog povećanja. Kako biste bili sigurni, uzimajte L-arginin samo unutar preporučenih doza. Ne preporuča se niti uzimanje L-arginina u slučaju da imate herpes jer se može dogoditi da će on stimulirati razmnožavanje virusa. Također, imate li problema s bubrezima ili jetrom, prije nego krenete konzumirati L-arginin konzultirajte se s liječnikom.0