By Dr. Stephanie (Zwonitzer) Anderson, DNP · Revive Institute of Sexual Health · Oct 27, 2026
Low T doesn’t usually show up all at once. It creeps in. A little less drive. A little more belly. A little less patience. Workouts that stop paying off. And because it’s gradual, most men blame work, stress, or birthdays.
I’m Dr. Stephanie (Zwonitzer) Anderson, DNP, and I treat low testosterone in men across Maryland. Here’s what low T really looks like, what causes it, how it’s properly diagnosed, and what treatment involves, no gym-bro myths included.
What Is Low Testosterone?
Testosterone is the main male sex hormone, made mostly in the testicles. It drives sex drive, erections, sperm production, muscle, bone strength, red blood cell production, energy, and mood.
Levels naturally drift down about 1% a year after 30, but getting older doesn’t automatically mean low T. Low testosterone (hypogonadism) means your levels are truly low on blood work and you have symptoms to match. You need both.
10 Signs of Low T
1. Your libido has left the chat
This is the classic sign. You think about sex less, initiate less, and just aren’t as interested as you used to be. Stress, relationship issues, depression, and medications can do this too, but a drop in desire with no obvious reason is the first thing I ask about.
2. Fewer morning erections
Morning erections are a built-in health check. If they’ve become rare, that’s worth noting. Trouble getting or keeping an erection during sex can be low T, but more often it’s blood flow, diabetes, blood pressure, or nerves. ED can be an early heart-health warning, so it deserves a real workup.
3. Tired no matter how much you sleep
You wake up tired, crash in the afternoon, and lean on caffeine to get through. Low T can do it. So can sleep apnea, anemia, thyroid problems, and depression. Fatigue plus low desire plus mood changes is a pattern worth testing.
4. The gym stopped paying off
Same workouts, smaller results. Strength dips, and muscle is harder to keep. Testosterone is a big driver of muscle, so this is one of the more frustrating signs for active guys.
5. More belly, less muscle
Low T often shifts your body composition toward more fat around the middle. And it’s a two-way street: belly fat lowers testosterone, and low testosterone makes it easier to gain belly fat. Low T is also closely tied to insulin resistance and type 2 diabetes.
6. Shorter fuse, lower drive
More irritable. Less motivated. Flatter mood. Losing interest in things you used to enjoy. Low T can affect mood and mental health, though stress, anxiety, depression, and poor sleep can look the same.
7. Brain fog
Losing your train of thought, forgetting details, or feeling a step slower at work. It’s not specific to low T, but it often shows up alongside the other signs.
8. Bad sleep (and maybe snoring)
Your body makes most of its testosterone while you sleep, so bad sleep means lower T. Loud snoring, gasping at night, or heavy daytime sleepiness can point to sleep apnea, which lowers testosterone and needs treatment — ideally before or alongside TRT.
9. Weaker bones
This one is silent. Long-term low testosterone can thin your bones, and some men don’t find out until they break one. If you’ve been diagnosed with low T, ask whether a bone density scan makes sense.
10. Fertility struggles
Low T can affect sperm production, but testosterone and sperm don’t always move together. You can have low T and still be fertile, or normal T and fertility problems.
The big one: testosterone therapy can lower your sperm count, sometimes to zero. If kids are in your future, say so before starting any hormone treatment.
What Causes Low T?
Low T comes from one of two places. Either the testicles aren’t making enough testosterone (primary), or the brain’s pituitary gland and hypothalamus aren’t sending the right signals (secondary). Common culprits:
- Extra weight, insulin resistance, and type 2 diabetes — some of the biggest, most fixable causes
- Sleep apnea and chronic sleep loss
- Medications, especially opioids and steroids
- Testicular injury, infection, chemotherapy, or radiation
- Pituitary or hypothalamus problems
- Age, though plenty of older men keep normal levels
In younger men especially, low T often has a reversible cause. That’s why figuring out why matters as much as the number.
How Low T Is Diagnosed
Symptoms are clues, not a diagnosis. Getting it right means:
- Morning blood work. Testosterone peaks in the morning, so that’s when it’s tested.
- A repeat test. Levels bounce around, so a low result gets confirmed with a second morning draw. A total testosterone below about 300 ng/dL, plus symptoms, is the usual threshold for getting insurance coverage, but many men are symptomatic even over 300.
- The full picture. Free testosterone, LH and FSH (to tell primary from secondary), estradiol, prolactin, a blood count, A1c, lipids, and PSA when appropriate.
- A real conversation about your symptoms, sleep, medications, health history, and whether you want kids.
One test at 4 p.m. after a bad night’s sleep isn’t a diagnosis. And no, you don’t need a “T-booster” from the supplement aisle — most don’t do much, and some are contaminated with things you really don’t want.
What About Testosterone Replacement Therapy?
For men with confirmed low/lower T and symptoms, testosterone replacement therapy (TRT) can be a game-changer for sex drive, energy, mood, muscle, and bone strength. It usually comes as injections, gels, or creams.
But it’s not a magic shot, and it isn’t right for everyone. Here’s what you should know going in:
- Fix the foundations too. Losing belly fat, lifting weights, treating sleep apnea, and cutting back on alcohol can raise your levels on their own — and make TRT work better if you need it.
- It can affect fertility. TRT can shut down sperm production. If you want kids, there are other approaches to talk through first.
- It needs monitoring. Regular labs check your testosterone, red blood cell count (TRT can thicken your blood), estradiol, and prostate health.
- Side effects are possible, like acne, fluid retention, and breast tenderness. Most are manageable with the right dosing.
How I Treat Low T at Revive
At Revive Institute of Sexual Health, you work directly with me through telehealth, anywhere in Maryland. No assembly-line T clinic, no one-size-fits-all dose.
- A thorough first visit about your symptoms, sex life, sleep, goals, and family plans
- Comprehensive morning labs at a draw site near you, confirmed before we treat
- A plan built for you, from lifestyle changes to TRT when it’s medically right
- Close follow-up, with labs at two months, then quarterly check-ins to keep you dialed in and safe
Care starts with Revive Foundation and continues through Vitality Membership, with sexual health built in. If low T has been affecting your relationship, your partner is welcome to join the conversation.
Stop Guessing. Get Tested.
If you’re nodding along to this list, fill out the contact form at reviveish.com to ask your questions or request a call to book your consult. Let’s find out if it’s really low T — and what to do about it.
This article is for education only and isn’t a substitute for personalized medical advice.