Testosterone. Even the word alone sounds manly.
For men, testosterone is important for drive, fertility, heart health, bone health, energy and mood — to name just a few benefits.
When you have low testosterone, you might experience anything from low energy to ED.
Testosterone replacement therapy (or TRT) aims to fix some of these issues by topping up your natural supply of the hormone.
But TRT isn’t for everyone. It comes with serious risks, and it’s only FDA-approved for those with low testosterone caused by a medical condition — not aging.
Read on to explore the benefits and side effects of TRT, as well as what you should know before starting the treatment. (Learn more about Does Testosterone Make You Gain Weight?.)
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What Is Testosterone Replacement Therapy?
So, what is TRT, anyway? Testosterone replacement therapy is exactly what it sounds like: treatment for men with low testosterone.
You can get man-made testosterone in the form of a:
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Patch
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Gel
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Pill
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Implant
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Injection
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Nasal spray
TRT can improve some of the symptoms of low testosterone by increasing the amount of the hormone in your system.
You may have low testosterone (also known as low T or hypogonadism) due to:
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Damage to the privates
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Medical conditions such as obesity and sleep apnea
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Aging
Testosterone levels start to decrease around age 30 to 40, but you can’t just get TRT if aging is the cause of your low testosterone.
Older men with low testosterone have a higher risk of catabolic effects (muscle wasting or losing fat) linked to acute and chronic medical conditions. And it’s unclear how safe or effective TRT is for men with low testosterone due to aging.
The FDA (U.S. Food and Drug Administration) has only approved testosterone products for men with no or low testosterone due to a medical condition. For instance, genetic problems or chemotherapy can stop the privates from producing testosterone.
Cutoffs vary according to different sources but generally below 300 ng/dL is considered “low” testosterone but treatment is recommended for low T alongside symptoms.
You can get on TRT by speaking to a healthcare physician — namely, an endocrinologist or urologist — about your symptoms. They can test you for low testosterone and prescribe hormone therapy if the treatment is right for you.
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Who Is a Good Candidate for TRT?
You may be a good candidate for TRT if you have low testosterone caused by a medical condition and are showing low T symptoms.
As noted, a healthcare provider can check your testosterone levels with lab tests to confirm if they are indeed low. The American Urology Association defines low testosterone as less than 300 nanograms per deciliter (ng/dL).
Besides measuring your testosterone levels, a healthcare provider may want to talk about any symptoms you’ve been having, like low libido or ED. They should also ask about your medical history or do a physical exam and further health tests.
Armed with all this info, a medical professional can diagnose you with low testosterone, figure out what could be causing it and determine whether the benefits of TRT outweigh the risks based on your symptoms, health conditions and risk factors.
Who’s not a good candidate for TRT? Well, we’ve already mentioned how testosterone treatments aren’t FDA-approved for men with low T due to aging.
Beyond this, guys with untreated prostate and breast cancer (yes, men can get breast cancer, too) shouldn’t get TRT. And it should probably be avoided in men with severe untreated obstructive sleep apnea — when your breathing cuts off in your sleep — as well as those trying to conceive.
If you have ED but normal testosterone levels, TRT isn’t for you, either.
Also, if your testosterone levels aren’t low, TRT won’t be prescribed. More doesn’t equal better when it comes to testosterone, so boosting testosterone levels may not help your symptoms if they’re caused by other conditions.
If you do have low levels, TRT will get you back to baseline. But there doesn’t seem to be any additional benefits in increasing testosterone levels further than that.
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Symptoms of Low Testosterone
The symptoms of low testosterone include:
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Loss of libido
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ED
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Depression
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Lack of energy
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Reduced cognitive function
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Loss of muscle mass and strength
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Osteoporosis (weak bones)
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Irritability
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Loss of body hair
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Reduce beard growth
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Obesity
It can be tricky to tell if you have low testosterone. After all, a lack of energy can be due to sleepless nights, loss of libido could boil down to relationship problems, and irritability might be because of, well…life.
Many men seek help after developing multiple symptoms of low testosterone.
If you think you may be suffering from low testosterone, reach out to a healthcare provider. They can do blood tests to measure your testosterone levels and check if they’re low.
Learn more in our guide to the signs of low testosterone in men.
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Common Causes of Low T
Causes of low T include:
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Aging
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Obesity
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Metabolic syndrome, including high blood pressure
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Infection
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Medications like antidepressants
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Autoimmune disease
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Pituitary gland disease
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Damage to the privates
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Removal of the privates due to cancer
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Chemotherapy or radiation
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Developmental differences
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Klinefelter syndrome
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Noonan syndrome
Lots of guys have low testosterone — and it gets more common with age.
Studies use different metrics to define low levels, so numbers vary. But research shows low testosterone could affect 20 percent of men in their 60s, 30 percent in their 70s and a whopping 50 percent of those over 80 years old.
Young guys don’t get away scot-free. Low testosterone can affect you at any age — it’s just rarer. Low testosterone may only affect around 1 percent of young men.
Also, low T is more common in men of all ages who are overweight or have diabetes. (Learn more about How to Lose Fat and Gain Muscle.)
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How Testosterone Replacement Therapy Works
Testosterone replacement therapy works by increasing the amount of testosterone in your system. You’ll take synthetic testosterone to make up for low levels of the natural hormone in your body.
It may take three to six months for symptoms to improve as testosterone builds up in your bloodstream and you figure out the best dose and regimen with your healthcare provider.
There are several different types of TRT:
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Patches. Testosterone patches are applied to the skin, typically on the back, stomach, thigh or upper arm. Similar to a nicotine patch, a testosterone patch slowly releases testosterone into your skin, after which it absorbs into your bloodstream.
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Gels. Gels also deliver testosterone into the bloodstream via the skin. You can apply a testosterone gel to your skin once a day. Take care not to transfer testosterone gel onto other people through skin-to-skin contact.
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Pills. Testosterone can also come in pills or capsules. These often contain testosterone undecanoate, a long-acting form of the hormone.
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Intranasal testosterone. Picture a nasal spray for allergies. Gel or liquid intranasal testosterone is pumped into your nostrils to reach your bloodstream nasally.
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Implants. Now we’re on to the more scary-sounding TRT treatments. Implants (also known as pellets) are implanted under the skin and slowly release testosterone into your system. They usually last three to six months before a new implant is placed.
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Injections. Testosterone can also be administered via an injection. You might get this done by a healthcare professional in a clinical setting or be taught how to administer your own injections at home.
Your healthcare provider can help you assess which type of TRT is right for you.
Be sure to let them know if there’s a type of TRT you’d rather avoid. Perhaps you’re not a fan of needles (who is?), so you’d rather not have a testosterone injection, for example.
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The Benefits of TRT
There are many benefits of testosterone replacement therapy.
TRT benefits include:
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More energy
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Increased libido
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Better intimate function (including improved ED)
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More lean muscle mass and increased strength
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Increased bone mineral density (BMD)
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Improved depressive symptoms
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Weight loss
In terms of ED, a 2017 review found that TRT may help improve mild ED but not moderate or severe ED.
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TRT and ED Medications
Phosphodiesterase 5 inhibitors (or PDE5 inhibitors) are a class of medication used to treat ED. Getting testosterone levels back to normal may help improve response to PDE5 inhibitors in men with low T who are unresponsive to the drugs.
You can learn more in our guide to low testosterone and ED.
TRT may also help treat hypoactive desire disorder (loss of desire) in postmenopausal women. It’s also sometimes used to create physical male gender characteristics in transgender people transitioning from female to male.
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Risks and Side Effects of TRT
It’s not all sunshine and rainbows. TRT can bring real benefits to your health and well-being if you’re suffering from symptoms of low testosterone — but it can also come with some ugly side effects and serious risks.
The side effects of testosterone replacement therapy include:
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Acne
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Redness, itching or a rash if you use gel or patches
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Swelling, bruising, pain and clotted blood under the skin if you use testosterone implants or pellets
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Reaction at the injection site if you use short-acting testosterone injections
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Allergic reaction if you use long-acting injections
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Pain and soreness at the injection site
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Infections if you use injections
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Infertility
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Male pattern baldness
Quick note on male pattern baldness: Testosterone is converted into dihydrotestosterone (DHT), a hair-hating hormone that can cause baldness in men. If you’re genetically predisposed to androgenic alopecia (the clinical term for this type of hair loss), TRT could actually speed up hair loss.
The risks of TRT include:
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Polycythemia (a high amount of red blood cells)
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Prostate-related events — think prostate enlargement and prostate cancer
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Reduction in high-density lipoprotein (HDL) cholesterol (aka “good cholesterol”)
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Obstructive sleep apnea (when you periodically stop breathing during sleep)
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Worsening of prostate cancer or breast cancer
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Stroke or heart attack
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All-cause mortality (death as a result of any cause)
Speak to a healthcare provider if you experience any distressing TRT side effects.
And get immediate medical attention if you experience:
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Trouble breathing
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Shortness of breath
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Chest pain
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Weakness in one side of your body
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Slurred speech
Here’s where things get complicated. Not everyone agrees on the risks of TRT.
For instance, the American Urological Association says that, based on results from peer-reviewed scientific literature, there isn’t strong evidence that TRT increases or decreases the risk of cardiovascular events.
In the end, it’s best to get personalized medical advice to find out if this type of hormone therapy is right for you.
One final thing to keep in mind: If you use any kind of topical testosterone — like gels, creams or liquids — another risk of testosterone therapy is that you can transfer the drug onto other people.
Be sure to cover the area and wash your hands after applying testosterone. You don’t want your partner, kids or anyone else you touch to unwittingly join you in your TRT journey.
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Things to Consider Before Starting TRT
TRT isn’t right for everyone. And, as with all medications, it comes with risks and side effects.
Before you start TRT, there are a few things to consider:
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Are you planning on having kids? If you plan on trying to conceive any time soon, let your healthcare provider know before starting TRT. Testosterone replacement therapy could disrupt normal sperm production, so your provider may recommend other treatment options or added treatment for sperm production.
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TRT isn’t a quick fix. Unfortunately, one pill or patch isn’t enough to fix all your low T symptoms. Also, it might take up to six months for testosterone to build up and start working its magic.
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You’ll need regular check-ups. You can’t just get a dose of testosterone and be on your way. You should be checked for heart disease and stroke before and while on testosterone. And you may need regular follow-ups with a healthcare provider to see if TRT is working.
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You might be in it for the long haul. When taking synthetic testosterone, your body slows down or stops producing its own supply of the hormone. This means you may not be able to stop testosterone therapy once you start. If you suddenly stop TRT, symptoms of low testosterone could come back, and potentially be more severe.
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How to Boost Testosterone Without TRT
If hormone replacement therapy isn’t for you, don’t fret. TRT isn’t the only way to boost testosterone — lifestyle changes can also make a difference.
Here’s how you can increase testosterone levels naturally:
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Exercise regularly. Aim for a mix of aerobic exercise (think running, cycling or swimming) and strength training (like weight lifting or bodyweight exercises).
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Eat a healthy diet. Eat a diet rich in fresh fruits and veggies, complex carbs, proteins and healthy fats.
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Try testosterone boosters. Natural testosterone boosters include ginseng, ashwagandha, zinc and fenugreek. (Psst — check out more foods that boost testosterone in our blog).
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Get enough sleep. You know the drill. Aim for at least seven hours of solid shut-eye a night.
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Understanding Testosterone Replacement Therapy
If you’re experiencing symptoms of low testosterone, you might be eyeing up testosterone therapy as a treatment option.
Here’s a quick recap of what you need to know:
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TRT can help improve some symptoms of low testosterone. It may increase your energy levels and libido and improve mild ED. Woo!
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TRT isn’t for everyone. TRT is usually prescribed to men who have low testosterone due to a medical condition, not naturally low levels that come with age.
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Watch out for side effects and risks. TRT side effects range from acne to infertility to male pattern baldness, and risks can include greater odds of a heart attack or stroke. Not fun.
This article originally appeared on Hims.com and was syndicated by MediaFeed.org.
Image Credit: stefanamer/istockphoto.
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