Growth hormone infusions tested for immune boost in healthy men
NCT ID NCT00663611
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This completed Phase 1 study tested whether giving growth hormone (Norditropin) through a small pump under the skin could improve immune function in healthy men aged 25 to 50. Participants received either growth hormone or a placebo for up to 4 weeks, with frequent blood and urine tests to monitor effects. The goal was to see if growth hormone can reverse age-related immune decline, but results are not yet available.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Norditropin (somatropin, a synthetic growth hormone)
What this could lead to
If successful, this study could point toward ways to boost immune function in older adults or those with weakened immune systems.
What could go wrong
This is an early Phase 1 study in healthy men only, so results may not apply to women, older people, or those with illnesses. The study is completed, but no clear outcomes are reported yet.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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National Institute of Aging, Clinical Research Unit
Baltimore, Maryland, 21224, United States