In the EU EFSA website I can not find any reference concerning the relationship between glutamine and growth hormone.

http://www.efsa.europa.eu

Thank you Dr.Antonio , I found some articles they says glutamin raises growth hormone level like arginin but read arginin prevent somatostatin hormone and finally growth hormone increases but I can't understand how is the glutamine effect on growth hormone.

About Arginine and growth hormone.

European Commission - Health and Consumers.

Claim ”Helps to stimulate the production of Human Growth Hormone”.

Non-compliance with the Regulation because on the basis of the scientific evidence assessed, this claimed effect for this food has not been substantiated.

Non-authorised.

2011;9(4):2051

http://ec.europa.eu/nuhclaims/?event=search&CFID=1333516&CFTOKEN=82162737&jsessionid=93126b6b834b698c6004665f7d1e734c175cTR

There is a connection between glutamine and arginine. See article below.

Glutamine is an important precursor for de novo synthesis of arginine in humans

Am J Clin Nutr May 2008 vol. 87 no. 5 1282-1289

Gerdien C Ligthart-Melis, Marcel CG van de Poll, Petra G Boelens, Cornelis HC Dejong, Nicolaas EP Deutz, and Paul AM van Leeuwen+ Author Affiliations

From the Department of Surgery, VU University Medical Center, Amsterdam, Netherlands (GCL-M, PGB, and PAMvL), and the Department of Surgery, University Hospital Maastricht and the Nutrition and Toxicology Research Institute Maastricht (NUTRIM), Maastricht, Netherlands (MCGvdP, CHCD, and NEPD)

Abstract

Background: A metabolic relation exists between glutamine and arginine, 2 amino acids with properties that enhance the recovery of seriously ill patients. It is possible that glutamine exerts part of its beneficial effects by enhancing the availability of arginine.

Objectives: We aimed to quantify under postabsorptive conditions the metabolic pathway of plasma glutamine into arginine via the intermediate citrulline and to establish the contribution of the kidneys to the synthesis of arginine.

Design: The study was conducted in patients during surgery. The metabolism of glutamine, citrulline, and arginine was studied by using intravenous administration of stable isotope tracers of the amino acids. Results were interpreted by using established equations. Parametric tests were used to test and correlate results. P < 0.05 was regarded as significant.

Results: Mean (±SE) whole-body plasma turnover rates of glutamine, citrulline, and arginine were 240 ± 14, 6.2 ± 0.6, and 42 ± 2.9 μmol · kg−1 · h−1, respectively (P < 0.01). Plasma turnover of citrulline derived from glutamine was shown to be 5.1 ± 0.7 μmol · kg−1 · h−1, and arginine derived from citrulline was shown to be 4.9 ± 0.9 μmol · kg−1 · h−1 (P < 0.01). The contribution of plasma glutamine to plasma arginine derived from plasma citrulline was calculated to be 64%. The kidneys were observed to take up >50% of circulating plasma citrulline and to release equimolar amounts of arginine into plasma.

Conclusions: This study shows that glutamine is an important precursor for the synthesis of arginine in humans. It also provides a firm basis for future studies exploring the effect of a treatment dose and the route of administration (enteral or parenteral) of glutamine.

I also endorse this finding

Glutamine might also increase plasma arginine and glutamate concentrations, a amino acids both potentially capable of eliciting growth hormone secretion, In addition conversion of glutamine to glutamate provides a stimulus for directly activating somatotrophic growth hormone release.