I understand what you are saying, but you cannot legitimately use T and even run your local 5K under existing rules (without a TUE) although most folks really wouldn't care if someone was not a podium contender. That said, the following are the risks per the Mayo clinic. The ones in red are what I wish upon my cheating age group peers.
What are the risks of testosterone therapy for normal aging?
Testosterone therapy has various risks. For example, testosterone therapy may:
- Contribute to sleep apnea — a potentially serious sleep disorder in which breathing repeatedly stops and starts
- Cause acne or other skin reactions
- Stimulate noncancerous growth of the prostate (benign prostatic hyperplasia) and growth of existing prostate cancer
- Enlarge breasts
- Limit sperm production or cause testicle shrinkage
- Increase the risk of a blood clot forming in a deep vein (deep vein thrombosis), which could break loose, travel through your bloodstream and lodge in your lungs, blocking blood flow (pulmonary embolism)
In addition, testosterone therapy may impact your risk of heart disease. Research has had conflicting results, so the exact risk isn't clear yet.
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For a second opinion, WebMD says:
What Are the Risks? There are some cautions men should know about.
Testosterone therapy can raise a man's risk for
blood clots and
stroke. Eisenberg says that men can offset that risk by occasionally donating
blood.
Uncommon side effects include
sleep apnea,
acne, and
breast enlargement. All such side effects go away if treatment is stopped.
Men who use a testosterone gel should wash their hands thoroughly after applying a dose and make sure that no one else touches the spots where they medicate. If a woman or child comes into contact with testosterone gels, it can cause side effects in them, including
hair growth and premature puberty.
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And finally - class action lawsuits revolve around these issues:
Testosterone Therapy and Heart Attacks Several studies documented several possible risks for men taking
testosterone-enhancing drugs. These drugs are linked to several heart problems, including
heart attacks.
One of the most recent studies, published on January 29, 2014, in the PLoS One journal, found that men older than 65 and younger men with undiagnosed heart disease had double the risk of suffering a heart attack after the first 90 days of testosterone therapy.
The study involved about 56,000 patients and was conducted by the National Cancer Institute and UCLA. Researchers compared data from patients before and after they received their first testosterone prescription.
This 2014 study was not the first to raise red flags about the cardiac risks associated with testosterone replacement drugs.
In 2010 and 2013, researchers conducted two studies published in the New England Journal of Medicine (NEJM) and the Journal of the American Medical Association (JAMA), respectively. These studies involved men who were frail or elderly and found that these men were more likely to suffer from several cardiac “events,” including heart attacks.
In fact, during the NEJM study, one man died and investigators said it was likely a heart attack brought on by testosterone use.