Amino Acid, combined with L-arginine effective in stimulating hGH. Very effective in stimulating the immune system to ward of Herpes virus.
Effects of oral ingestion of amino acids and proteins on the somatotropic axis.
van Vught AJ, Nieuwenhuizen AG, Brummer RJ, Westerterp-Plantenga MS.
Department of Human Biology, University of Maastricht, P.O. Box 616, Universiteitssingel 50, 6200 MD Maastricht, The Netherlands. a.vanvught@hb.unimaas.nl
CONTEXT: GH is an important regulator of growth and body composition. It has been shown that GH release can be promoted by iv as well as oral administration of various amino acids (AAs), especially arginine (ARG) and lysine (LYS), which are amply present in soy protein. However, the effects of dietary protein on GH secretion are less well described.
OBJECTIVE AND DESIGN: In an experiment, we compared the effects of oral ingestion of a mixture reflecting the AA composition of soy protein (AA), with oral ingestion of ARG + LYS, on GH secretion in eight healthy women (body mass index 19-25 kg/m(2); age, 18-24 yr). In a second experiment, we compared oral ingestion of hydrolyzed soy protein and complete soy protein with the AA mixture on GH secretion in eight healthy women (body mass index 19-26 kg/m(2); age, 19-36 yr). Both experiments were performed in a randomized, single-blind crossover design. GH, insulin, glucose, and plasma AA were determined every 20 min, during 3 h in the first experiment and during 5 h in the second experiment.
RESULTS: Peak values of GH were higher after ingestion of the AA mixture compared with ingestion of ARG + LYS (P < 0.05). GH responses, as determined by area under the curve, did not significantly differ after ingestion of the complete soy protein, hydrolyzed soy protein, or AA mixture but were all higher than after placebo (P < 0.05). Insulin responses (area under the curve) were higher after ingestion of hydrolyzed soy protein, complete soy protein, and AA mixture, compared with placebo (P < 0.05). Glucose concentrations were unaffected.
CONCLUSION: Ingestion of soy protein, either hydrolyzed or intact, as well as AAs reflecting soy protein, stimulates GH release to a similar extent.
L-Lysine is an essential amino acid. Think of Arginine and Lysine as peanut butter and jelly - they just work real well together! A 1981 study by Italian researcher A. Isidori, M.D. at the University of Rome found that the combination of 1,200 milligrams of lysine and 1200 milligrams of arginine pyroglutamate in fifteen male volunteers between the ages of fifteen and twenty was ten times more effective than taking arginine alone. According to the researchers, "we could demonstrate that the association of the two amino acids does result in the release of biologically active hormone able to affect peripheral cellular receptors and thus cell growth in general."
Lysine by itself is not a powerful HGH enhancer, but when combined with Arginine it increases the power of the Arginine. In addition, there is evidence that a combination of lysine and arginine may increase thymic hormone secretion in older animals and humans, partially reversing the immunodeficiency of aging.