TRT and relationships: what testosterone actually does to your sex life and mood

What did @steven actually say?

@steven made a handful of hormone claims in a short clip: testosterone drives desire in both men and women, women actually have more testosterone than estrogen in their bodies, and chronic stress tanks testosterone by raising cortisol. He also flagged thyroid and prolactin as hormones that interact with testosterone and affect libido. His closing point was that fixing hormone numbers without addressing stress misses the root cause. That last point, at least, holds up reasonably well.

Does the science back this up?

Mostly, yes, but some of it needs serious qualification. The cortisol-testosterone relationship is real and documented. A 2016 study by Whirledge and Cidlowski in Endocrinology confirmed that glucocorticoids, including cortisol, suppress the hypothalamic-pituitary-gonadal axis, which reduces testosterone output. Chronic stress does measurably lower testosterone in men. The thyroid-testosterone link is also well established. Hypothyroidism is associated with reduced sex hormone-binding globulin and altered testosterone metabolism, per work by Krassas et al. (2010, Endocrine Reviews). Elevated prolactin suppressing testosterone is textbook endocrinology and not controversial.

The claim about testosterone in women is where things get slippery. Technically, circulating testosterone concentrations in women are higher than estradiol concentrations when measured in the same units, nanomoles per liter. But this framing can mislead. Estrogen's biological activity in women is not simply a numbers game, and "more testosterone than estrogen" without that context risks confusing viewers.

What did they get wrong (or right)?

Credit where it is due: @steven is right that testosterone is relevant to libido in women, and that this is underdiscussed in popular health content. Davis et al. (2016, Lancet Diabetes and Endocrinology) confirmed that testosterone plays a role in female sexual function and that low levels are associated with hypoactive sexual desire disorder. That is a legitimate and often overlooked clinical point.

Where @steven oversimplifies is the phrase "you can't produce testosterone" when cortisol is high. That is not quite how it works. Chronic stress suppresses the HPG axis and can reduce testosterone, but the relationship is not a hard on/off switch. Acute stress can briefly raise testosterone in some contexts, per Mehta and Josephs (2010, Hormones and Behavior). Saying cortisol simply blocks testosterone production is a cleaner story than the actual physiology supports.

His framing of testosterone as the "most notorious hormone for desire" also flattens a complex picture. Dopamine signaling, oxytocin, and estrogen all play documented roles in libido. Testosterone is important, but presenting it as the lead actor without naming the supporting cast can push people toward unnecessary TRT before other causes are ruled out.

What should you actually know?

If your libido has dropped, a hormone panel is a reasonable starting point, but it is not the whole picture. Clinicians evaluating low libido should check total and free testosterone, thyroid-stimulating hormone, prolactin, and in some cases DHEA-S. That part of @steven's advice is sound and aligns with Endocrine Society clinical practice guidelines.

Chronic stress management is not optional if you are chasing better hormone levels. The evidence for stress reduction on testosterone is real. A 2021 review by Wester and colleagues in Stress journal found that psychological stress interventions produced modest but measurable improvements in testosterone in men with chronic stress profiles.

For women specifically, testosterone therapy for low libido remains an off-label use in the United States. It can be appropriate in some clinical contexts, but it requires careful evaluation by a qualified provider, not a TikTok diagnosis. Dosing, monitoring, and formulation all matter, and none of that nuance fits in a 60-second clip.

@steven's overall message, that stress and hormones are connected and that fixing numbers without fixing lifestyle is incomplete, is reasonable public health messaging. But viewers should not walk away thinking a testosterone test is all they need, or that cortisol is the only reason their libido has changed.