JSmith sanoi:
Onko todistettu? (Ihmisessä, ei rotissa tai diabeetikkohamstereissa :D )
BTW, tulee melko kalliiksi tuollainen 1-2 g päivässä. Esim, jossain luontaistuotekaupassa on myyty 100 mg kapseleita hintaan n. 16 euroa rasia, jossa oli joko 60 tai 90 kapselia. Lisäravinnekaupoistakin sitä saa mutta hinta oli niinkin korkeahko.
Kyyllä ALAa on ihmisilläkin testattu :D, mutta totta on, että Suomessa ALA on kallista. Sen lisäksi Suomessa myytävä ALA on racemic-ALAa eli siinä on S- ja R-isomeerejä suhteessa 50/50. Tutkimuksissa yleensä on käytetty R-muotoa.
Olen itse tilannut R-ALAa Jenkeistä hintaan 20 euroa/paketti (90 kpl R-ALAa á 200 mg) eli 18000 mg suunnilleen samaan hintaan kuin Suomessa maksaa 6000 mg. Lisäksi tuossa Suomessa myynnissä olevassa ALAssa siis on R-ALAa vain 3000 mg (6000:2) eli hintaero on n. kuusinkertainen, kun ilmeisesti juuri R-muoto on biologisesti aktiivinen. Normi-ALA onkin sitten Jenkeissä puoli-ilmaista.
Tässä alkuun muutama tutkimus:
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Konrad D, Somwar R, Sweeney G, Yaworsky K, Hayashi M, Ramlal T, Klip A. The antihyperglycemic drug alpha-lipoic acid stimulates glucose uptake via both GLUT4 translocation and GLUT4 activation: potential role of p38 mitogen-activated protein kinase in GLUT4 activation. Diabetes. 2001 Jun;50(6):1464-71.
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Nichols, T.W. Alpha lipoic Acid: Biological Effects and Clinical Implications,
Moini, H., Tirosh, O., R-Alpha Lipoic Acid Action on Cell Redox Status, the Insulin Receptor, and Glucose Uptake in 3T3-L1 Adipocytes; Archives of Biochem & BioPhys 397, No2 384-391 (2002)
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Packer, L; Tritschler, H.J.; Neuroprotection by the Metabolic Antioxidant Alpha Lipoic Acid; Free Rad Biol Med 22, Nos 1 / 2, 359-378 (1997)
Hermann, R.; Niebch, G.; Enantioselective pharmacokinetics and bioavailability of different racemic alpha lipoic acid formulations in healthy volunteers. Eur J Pharm Sci 4: 167-174 (1996)
Gordon N, Newton RW. Glucose transporter type1 (GLUT-1) deficiency. Brain Dev. 2003 Oct;25(7):477-80. Review.
El Midaoui A, de Champlain J. Prevention of hypertension, insulin resistance, and oxidative stress by alpha-lipoic acid. Hypertension. 2002 Feb;39(2):303-7.
Evans JL, Goldfine ID. Alpha-lipoic acid: a multifunctional antioxidant that improves insulin sensitivity in patients with type 2 diabetes. Diabetes Technol Ther. 2000 Autumn;2(3):401-13.