L-arginine and ornithine can significantly increase the body's HGH and IGF-1 levels.
For several years there has been Arginine und Ornithin as dietary supplements, and they are used as ingredients in many other supplements.
Arginine is generally considered a means of Dilation of blood vesselsso that you have more energy and a bigger pump during training. Many bodybuilders report a stronger one Vascularity and faster recovery if they take arginine. Scientists attribute these results to the fact that arginine is the Nitric oxide concentration (a powerful vasodilator) increases and the Blood circulation the muscles.
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Ornithin is made by the enzymatic Metabolism of arginine Formed during urea production and is involved in arginine production in the body. Both substances play an important role in the production and regulation of growth hormone (HGH). However, until recently there was limited evidence of how effective arginine and ornithine are as HGH boosters.
HGH stands for Human Growth Hormone, a growth hormone also called somatropin. Somatropin is produced in the α cells of the anterior pituitary gland. Its release is regulated by the hypothalamus with its somatropin-releasing factor (SRF, GHRH Growth-Hormone-Releasing-Hormone, GRF, somatoliberin) and somatostatin. Most somatropin is produced during sleep. Puberty is the age with the most pronounced somatropin production.
Polish scientists have shown that one Arginine and ornithine intake during weight training the HGH and IGF-1 values (insulin-like growth factor-1) increased significantly.
Studies on arginine and ornithine
In the double-blind study, 17 junge Sportler (Bodybuilders and weightlifters) divided into a test group and a control group (placebo). All participants had to consume the same number of calories every day and follow the same training plan. The athletes took either 2.2 grams of ornithine and three grams of L-arginine or a placebo twice a day (one hour before training and 30 minutes before bed) for three weeks, and did intense weight training for the lower body.
At the beginning and at the end of the study, blood samples were taken from the subjects, two minutes and one hour after exercise. The cortisol, testosterone, HGH, IGF-1 and insulin values as well as the values of the IGF binding protein (IGFBP-3) were examined. At the beginning of the study, no differences were found in the hormone levels. Due to the training, however, all values were increased at both times.
Astonishingly, those who took arginine and ornithine had almost 25 percent higher blood levels of HGH and IGF-1 than the placebo group.
THE MEDICAL OPINION!
This latest piece of evidence is compelling evidence that arginine and ornithine act as post-exercise regulators of HGH and IGF-1 release. The data presented by the study confirm that arginine and ornithine are valuable pre-workout supplements.
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