Is HGH Linked to Cancer? What Long-Term Studies Show
In 2002, headlines warned that human growth hormone might be linked to cancer. The story came from a large study in the United Kingdom, and it still shows up in forum threads today. People who are curious about HGH, or already using an HGH supplement, want a clear answer: does growth hormone cause cancer?
The honest answer is that the picture is mixed and still being studied. In this article, we will walk through what the long-term research found, why scientists take the question seriously, and what it means for over-the-counter HGH products.
Why researchers worry about growth hormone and cancer
Growth hormone works partly by raising another hormone called IGF-1 (insulin-like growth factor 1). IGF-1 tells cells to grow and divide. That is useful for children who need to grow and for adults with a true deficiency. It is also why researchers ask whether pushing growth signals higher for years could encourage the growth of abnormal cells.
The 2002 UK study
The study behind those headlines followed people in the UK who had been treated with growth hormone extracted from human pituitary glands between 1959 and 1985. Researchers found higher than expected rates of certain cancers, including colorectal cancer and Hodgkin lymphoma [1]. The number of cases was small, and the hormone used back then came from cadavers, not the recombinant HGH used today. Still, the findings were strong enough to keep the question open.
Newer long-term data
Since then, researchers have followed people treated with modern recombinant growth hormone in childhood for decades. The European SAGhE project is one of the largest of these efforts and has examined long-term mortality in thousands of patients treated as children [2]. Results depend heavily on why someone was treated in the first place, since some underlying conditions carry their own risks. This is why doctors monitor patients on growth hormone over the long term.
What major health sources say today
Mayo Clinic advises against using HGH to treat aging and lists a possible higher risk of certain cancers among its concerns, along with high blood sugar and joint pain [3]. Cleveland Clinic stresses that synthetic HGH should only be taken with a prescription for an approved condition [4].
For healthy adults, the reasoning is simple. If HGH offers little proven benefit for aging, even a small or uncertain cancer risk is hard to justify.
What about HGH supplements and sprays?
Over-the-counter HGH supplements do not contain growth hormone. They contain amino acids and other ingredients marketed to support your own production. We are not aware of evidence that these products raise IGF-1 enough to change cancer risk, and we are also not aware of long-term safety studies on most finished products. That uncertainty cuts both ways.
If you have a personal or strong family history of cancer, talk to your doctor before using any product that claims to raise growth hormone or IGF-1. This includes supplements, sprays, and so-called secretagogues.
The bottom line
- Prescription HGH has known benefits for specific medical conditions and is monitored by doctors.
- Long-term studies have raised questions about cancer risk, especially with older pituitary-derived hormone, and research is ongoing.
- HGH is not recommended for anti-aging in healthy adults.
- OTC HGH supplements do not contain HGH, and their long-term safety is not well studied.
If you want to understand how supplements differ from prescription HGH, read our guide to HGH supplements. For a basic overview of the hormone itself, see What Is HGH?
This article is for information only and is not medical advice. HGHSpecial does not sell prescription HGH or somatropin. Talk to your doctor before taking any supplement, especially if you have a health condition or take medication.
Sources
- Swerdlow AJ, et al. Risk of cancer in patients treated with human pituitary growth hormone in the UK, 1959-85: a cohort study. Lancet. 2002
- Sävendahl L, et al. Long-term mortality after childhood growth hormone treatment: the SAGhE cohort study. Lancet Diabetes Endocrinol. 2020
- Mayo Clinic. Human growth hormone (HGH): Does it slow aging?
- Cleveland Clinic. HGH (Human Growth Hormone): What It Is, Benefits & Side Effects
