Yes, modestly, in controlled studies. Intravenous arginine reliably raises growth hormone, and oral doses of roughly 5 to 9 grams raised it in one study of healthy men. Responses vary a lot between people, and some studies found no effect or a smaller response around exercise.
How Arginine Is Thought to Work
A systematic review and meta-analysis explains that arginine can modulate growth hormone release by suppressing somatostatin, the body’s natural brake on HGH, and by prompting release of growth hormone-releasing hormone. Intravenous arginine is even used clinically to test whether the pituitary can still respond in suspected growth hormone deficiency.
What the Meta-Analysis Found
That analysis pooled randomized trials and found a significant increase in growth hormone with arginine alone, and a larger one when arginine was combined with growth hormone-releasing hormone. It found no significant difference between patients and healthy people, or between oral and injected arginine. Pairing arginine with the releasing hormone is a clinical testing procedure that uses an injected hormone.
Oral Arginine in Healthy Men
In a dose study of eight healthy men aged 18 to 33, 5 and 9 grams of oral arginine caused a significant growth hormone response. The rise began about 30 minutes after ingestion and peaked about 60 minutes after. In a placebo-controlled trial of 30 men, 10 grams modestly increased growth hormone, but only 16 men had detectable increases.
Where Results Are Mixed
A trial in eight men found that 7 grams of arginine attenuated the growth hormone response to resistance exercise. Another study reported that oral arginine did not stimulate basal or exercise-induced GH in young or older adults. A review of amino acids as GH-releasing agents notes a high degree of variability between individuals that may depend on training status, sex, age, and diet.
What This Means for You
A brief rise in blood HGH after an oral dose is not the same as more HGH over a day, and it does not show a change in muscle, fat, or energy. A review in Sports Medicine reports that HGH is elevated for about 15 to 30 minutes after a resistance workout when the stimulus is adequate.
How HGH Releasers Differ From Prescription HGH
Every study described here tested L-arginine on its own. Prescription HGH is an injectable medicine that doctors prescribe for specific medical conditions. HGH releasers are a separate category: over-the-counter dietary supplements formulated with ingredients, such as amino acids and other nutrients, intended to support your pituitary gland’s own release of HGH. The two are different products and are studied separately. Like other dietary supplements, HGH releasers are not intended to diagnose, treat, cure, or prevent any medical condition.
Where HGH Releasers Fit Into a Healthy Routine
Men who take a releaser typically do so as one part of a routine that includes training, nutrition, and rest. If you are curious about trying one, it is sensible to check with your doctor first, particularly if you take medication or have an existing health condition.
Frequently Asked Questions About L-Arginine and HGH
Are HGH Releasers the Same as Prescription HGH?
No. Prescription HGH is an injectable medicine used for specific medical conditions. HGH releasers are over-the-counter dietary supplements formulated to support the body’s own natural growth hormone release.
Does Oral Arginine Raise HGH as Much as Intravenous Arginine?
In a meta-analysis of randomized trials, oral and injected arginine did not differ significantly, though oral arginine showed a smaller average rise. Responses vary widely between people.
Should I Talk to My Doctor Before Trying an HGH Releaser?
Checking with your doctor is a smart step, especially if you take medication or have a health condition. Your doctor can help you decide whether a supplement fits your situation.