COM­BI­NA­TION OF L-LY­SINE & ARGI­NINE RE­DUCE STRESS & COR­TI­SOL LEV­ELS

Australian Natural Bodz - - Supplement Central -

Sup­ple­men­ta­tion with 2.34 g L-ly­sine and the same amount of L-argi­nine daily re­duces psy­cho­log­i­cal stress and low­ers cor­ti­sol amounts in men’s bod­ies. Re­searchers at the Ja­panese Aji­nomoto amino acid man­u­fac­tur­ers an­nounced this in Bio­med­i­cal Re­search. Miro Sm­riga, the first au­thor in the ar­ti­cle that was pub­lished in Bio­med­i­cal Re­search in 2008, has stud­ied the ef­fect of the ly­sine-argi­nine com­bi­na­tion on anx­i­ety and stress for years. He’s ob­served the ef­fect in mice sub­jected to a stress­ful sit­u­a­tion in a lab­o­ra­tory, in pigs be­ing trans­ported and in hu­mans with a stress-sen­si­tive per­son­al­ity. At least part of the ex­pla­na­tion for the stressre­duc­ing ef­fect of the ly­sine-argi­nine com­bi­na­tion is prob­a­bly that ly­sine in­ter­acts with the re­cep­tor for GABA. Sleep­ing pills and al­co­hol also work via the same re­cep­tor. In the study that was pub­lished in Bio­med­i­cal Re­search, the re­searchers gave a group of about one hun­dred healthy test sub­jects 2.34 g L-ly­sine and 2.34 g L-argi­nine daily for seven days. The sub­jects took the amino acids twice a day, at break­fast and the evening meal. Af­ter the sup­ple­men­ta­tion pe­riod the re­searchers got their sub­jects to com­plete a ques­tion­naire, the State-Trait Anx­i­ety In­ven­tory. Psy­chol­o­gists use this to mea­sure how sen­si­tive you are to stress in daily life. The study showed that the sen­si­tiv­ity de­creased in the sub­jects that had taken the ly­sine-argi­nine com­bi­na­tion. Cor­ti­sol is the main hor­mone as­so­ci­ated with stress. The re­searchers mea­sured the cor­ti­sol con­cen­tra­tion in the sub­jects’ saliva and saw that this did not de­crease sig­nif­i­cantly in the women that had taken ly­sine and argi­nine sup­ple­ments. In the men how­ever this did hap­pen, as the re­sults showed. The amino acids re­duced the men’s cor­ti­sol con­cen­tra­tions by 18 per­cent. The re­searchers took their mea­sure­ments be­tween 9 and 10 in the morn­ing. The Ja­panese also stud­ied the ef­fect of a stress­ful event – in this case ex­po­sure to noise - on the sub­jects. They no­ticed that ly­sine/argi­nine sup­ple­men­ta­tion had no ef­fect on the cor­ti­sol con­cen­tra­tion in the women, but that in the men this speeded up the re­turn of cor­ti­sol con­cen­tra­tions to nor­mal lev­els.

Musclemania ® Pro

Law Payne

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