What to Try Before Starting Testosterone Therapy

Testosterone replacement therapy works. For men with clinically confirmed low testosterone and genuine symptoms, it can significantly improve quality of life. But it is also a long-term commitment with real trade-offs, and for some men, it turns out not to be necessary once underlying factors are addressed.

This is a practical guide to what is worth trying first. Not because TRT should be avoided, but because starting it when you did not need to is a worse outcome than taking four weeks to find out.

Why This Matters

TRT works by introducing external testosterone, which signals the body to reduce or stop its own production. Over time, the testes atrophy and natural production declines significantly. Stopping TRT requires a recovery period that can last months and is often difficult. Fertility is meaningfully impaired while on TRT and may take time to recover after stopping.

None of this makes TRT a bad choice for the right candidate. But it means the right candidates should be sure before starting, and that process should include ruling out fixable causes first.

Sleep: The Most Underestimated Factor

The majority of daily testosterone production happens during sleep, specifically during slow-wave and REM stages. Sleep deprivation, even one week of sleeping five hours a night, has been shown in studies to reduce testosterone levels by 10 to 15 percent in healthy young men. That is a meaningful suppression from a single behavioral cause.

More importantly, untreated obstructive sleep apnea is directly linked to low testosterone. Men with moderate-to-severe sleep apnea who receive CPAP treatment show significant testosterone improvements, often without any other intervention.

If you are sleeping fewer than seven hours consistently, or if you snore heavily or wake unrefreshed despite adequate time in bed, sleep is the first place to look, before blood tests, before supplements, before anything else.

Body Composition

Adipose tissue (body fat) contains an enzyme called aromatase that converts testosterone to estrogen. The more visceral fat a man carries, particularly around the abdomen, the more testosterone is converted rather than circulating freely. This creates a cycle: low testosterone makes it harder to lose fat, and excess fat further suppresses testosterone.

Clinical studies consistently show that meaningful weight loss, particularly loss of visceral fat through a combination of caloric deficit and exercise, increases testosterone, sometimes substantially. One study found total testosterone increased by an average of over 200 ng/dL in obese men who lost significant weight through diet and exercise alone.

This does not mean you need to achieve an ideal body composition before considering TRT. It means that if you are carrying significant excess weight, addressing that first gives you a more accurate baseline and may resolve the problem on its own.

Resistance Training

Heavy compound resistance training (squats, deadlifts, presses) acutely raises testosterone and, with consistent training over time, can increase baseline levels. The effect is more pronounced in men who have been sedentary and begin training, and less dramatic in men who are already consistently active.

Three to four sessions per week of genuine strength training (not just cardio or light machines) is the relevant stimulus. Endurance-only training, particularly excessive long-duration cardio, has a more mixed relationship with testosterone and in some cases is associated with lower levels.

If you are not currently doing resistance training, starting it is one of the highest-return changes you can make, regardless of where testosterone ultimately lands.

Alcohol

Alcohol suppresses the hypothalamic-pituitary-gonadal axis, the hormonal cascade that drives testosterone production. Chronic heavy drinking is associated with significantly reduced testosterone. Even moderate regular drinking has measurable effects.

The threshold matters. Occasional social drinking at genuine moderation is unlikely to be a major driver. Daily drinking, or regular heavy episodes, is worth addressing before attributing low testosterone to something that requires lifelong treatment.

Zinc and Vitamin D

Zinc is directly involved in testosterone synthesis. Severe zinc deficiency is associated with significantly reduced testosterone, and supplementation in deficient men has been shown to restore levels. Men who sweat heavily through exercise can lose meaningful amounts of zinc and may benefit from supplementation even without a frank deficiency.

Vitamin D is a hormone precursor, and low vitamin D is associated with lower testosterone in observational studies. The relationship is not as clean as zinc, but given the high prevalence of vitamin D insufficiency, particularly in northern latitudes and in men who spend little time outdoors, it is worth checking levels and supplementing if low. Standard dosing of 2,000 to 4,000 IU daily is commonly recommended, though your physician can advise based on your actual levels.

What to Rule Out Medically

Before attributing symptoms to primary low testosterone, a physician should also consider:

• Thyroid function: hypothyroidism produces symptoms nearly identical to low T and is far simpler to treat
• Medications: opioids, some antidepressants, corticosteroids, and anabolic steroids (including prohormones) all suppress testosterone
• Depression: can present with fatigue, low libido, and cognitive changes that mirror low T; the treatment is different
• Type 2 diabetes or insulin resistance: strongly associated with low testosterone and sometimes the primary driver

A good physician will ask about all of these before recommending TRT. If they do not, that is a signal.

The Right Sequence

The most sensible approach looks like this:

1. Get blood work done to establish a baseline: total testosterone, free testosterone, LH, FSH, SHBG, thyroid panel
2. Address obvious lifestyle factors over four to eight weeks: sleep, alcohol, training, weight if applicable
3. Retest
4. If levels remain low and symptoms persist, a conversation about TRT with a physician is the right next step

This is not an argument for delaying treatment indefinitely. It is an argument for making sure that when you start TRT, you are starting it because you need it, not because something fixable was driving the numbers.

Gladius Health connects men with licensed physicians who take this approach. The evaluation includes a proper review of symptoms, history, and relevant factors, not just a reading and a prescription. If TRT is appropriate, you will know. If something else is worth addressing first, you will know that too.