How Does Testosterone Really Affect Personality?

The Testosterone Factor

High and low-testosterone men have different personality traits. But can boosting T change your personality? Here's what you need to know.

What makes you you? Most say it's your personality, that unique combo of thoughts, feelings, behaviors, and characteristics that define how you consistently interact with and respond to the world. (That "consistent" part is key.)

But where does your personality come from? Are you born with it, or is it shaped by life experiences? Most experts today think your personality is "built" from both innate traits and later experiences. Part of your personality is genetic or biological and linked to brain chemistry. Other parts are more malleable.

But what about hormonal status and personality? There's no scientific argument about how a female's personality traits subtly shift throughout her menstrual cycle. Hormones like estrogen, LH, progesterone, and testosterone are in constant flux, and her behaviors and personality shift accordingly. Her core personality may not change, but there are oscillations within her innate boundaries.

So, what about men? How do their testosterone levels affect their personalities? And how does TRT or a T-boosting supplement (Buy at Amazon) affect it?

High vs. Low-T Personalities

Testosterone levels do influence men's personalities. These effects can vary widely in individuals, but we can observe some general trends:

The High-T Personality

  • Men with high testosterone tend to display more dominant behaviors and are often more assertive or competitive. They might feel a stronger drive to excel and lead.
  • While aggression isn't a guarantee, higher testosterone levels correlate with increased impulsive or risk-taking behavior. But this usually doesn't manifest in violent behaviors; it's more of a tendency to take calculated risks. And "aggression" often presents in a socially acceptable manner: aggressive in his career, aggressive in protecting his family, etc.
  • Elevated testosterone levels boost confidence, self-esteem, and libido. Socially, a high-T man appears more extroverted or outgoing.
  • Generally, a high-T man has a more stable mood and he's less likely to be neurotic.
  • High-T men are often treated differently based on social perceptions. People notice a man with more muscle, less fat, a deeper voice, and more manly facial features, and change how they interact with him. You could argue that this affects the man's changeable/shiftable personality traits.

The Low-T Personality

  • Very generally, men with low testosterone have reduced levels of motivation, ambition, and energy. So, they might be less competitive or at least less driven to seek challenges or take risks.
  • They may have a higher level of emotional sensitivity and be more empathic and nurturing. During conflicts, they may take a more passive approach. They often have a heightened awareness of other people's feelings.
  • Sometimes, low T correlates with low libido and low confidence. A low-T man is more prone to social withdrawal.
  • Lower testosterone levels are linked to depressive symptoms, anxiety, and mood variability.

How Does a T Boost Affect Personality?

When a low-T male brings his levels up to normal or high normal with TRT or a testosterone-elevating supplement, many of his personality traits shift as you'd expect: he exhibits more high-T traits and fewer low-T traits.

Other traits are considered more set in stone. They're either innate or develop and "stick" in early childhood. Temperament or your baseline mood (positive or negative) is one example. But even those traits are considered interactive: they can change, at least subtly, based on life experiences and personal development.

The Great Testosterone Decline

One could argue that society needs both high-T and low-T men. One could also argue that we already have low-T humans: women. That masculine and feminine balance is already in place. It's a balance that works very well since any shortcoming of one sex is balanced by the strengths of the other.

The problem? Male testosterone levels are falling. Aging and fatherhood lower testosterone, but even younger, childless men are experiencing declines. Experts blame numerous things, from environmental endocrine disruptors (plastics) to poor diets, sedentary lifestyles, low vitamin D levels, and stress.

Here's something many overlook: Rising levels of sex hormone-binding globulin (SHBG). It's a glycoprotein that binds to testosterone in the bloodstream, making it unavailable for use by the body. It lowers levels of free (bioavailable) testosterone. Your total T may be fine, but your free T is low, so you experience all the same symptoms of low testosterone.

Lots of things can cause an unwanted rise in SHBG:

  • Stress (chronically elevated cortisol)
  • Aging
  • A long-term, low-carb diet (not enough insulin to suppress SHBG)
  • A low-protein diet
  • Excess abdominal fat

How Do We Fix This?

Testosterone replacement therapy can do the trick, but SHBG can still be elevated. Certain natural T-boosters reduce SHBG, which in turn increases free testosterone. Longjack (also called Tongkat Ali or Eurycoma) is one such supplement.

Longjack's bioactive compounds interact with various hormonal pathways, lowering SHBG production. It also lowers cortisol levels, which in turn reduces SHBG.

Longjack also increases androgen receptor sensitivity, improving the effectiveness of available testosterone. This increased receptor activity causes the body to "sense" higher levels of active testosterone, reducing the need for high SHBG levels to regulate testosterone availability.

If you want to try it, use only the patented LJ100 form of Longjack. Take 300 mg daily, which is a big dose. Omega-Man High Absorption Longjack (Buy at Amazon) contains this amount and uses a self-emulsifying delivery system to get all active fractions into your body.

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Will your core personality change? Probably not, but you might experience a shift towards a higher-T personality: more assertive and competitive, a more stable mood, a stronger libido, and more drive.

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One of the issues with low testosterone levels amongst men is women. Women who are training their men to be low-T slaves. These men are desperate for attention. They already have low testosterone. So they don’t know how to go about getting attention, and they fall for this. They sell their manhood for attention from women.

Its not just women who do this. Quite often men pretend to be women for a same end. Predators will always find prey.

How so? What’s an example of training a man in a way that such training makes less T produced in him?

Teaching him to not go to the gym. To not be masculine. To not be competitive. To not assert himself. To be a soy boy. All with the promise of sex

There’s some evidence, though not totally conclusive, of this:

Chronic stress, humiliation, or emotional abuse can spike cortisol which has a suppressive effect on testosterone production. When cortisol is elevated long-term, it disrupts the hypothalamic-pituitary-gonadal axis, reducing LH signaling to the testes.

Research on social dominance shows that men in submissive or defeated roles often have lower T levels—think of primate studies where beta males have less T than alphas. In humans, a 2016 study in Psychoneuroendocrinology found that men in high-conflict relationships had lower T compared to those in stable ones, likely due to chronic stress. Another angle: prolonged emotional distress can tank libido and energy, both tied to T, creating a feedback loop.

Others say it’s more about lifestyle fallout (poor sleep, no exercise) than her treating him poorly directly. Either way, the science leans toward yes, it’s plausible.

EDIT: Just thought of this too. Researchers use a nasty method called the social defeat stress model to test out stuff like this. Basically, they take a smaller mouse and put him in with larger, dominant mice, who bully him. Researchers measure outcomes like cortisol levels, testosterone, or brain changes to study stress-related disorders like depression or PTSD.

The stressed mouse shows signs like reduced social interaction, weight loss, or learned helplessness, mimicking human responses to chronic adversity. And yep, the subordinate mouse’s T levels drop, usually after 10 days of repeated exposure to the bully mice. I imagine a man being dominated and emasculated by a woman could experience some of the same things.

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Why did researchers go through all the effort to recreate middle school?

Ha! I made the same joke to my wife: “So, the 7th grade locker room?”

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If the longjack is stopped do these low T scores come back?

Pretty much, just like TRT.

Longjack primarily works by stimulating the release of free testosterone and reducing sex hormone-binding globulin (SHBG).

Since it doesn’t shut down the body’s own testosterone production (like anabolic steroids or prohormones do), there’s no “crash” or suppression that requires post-cycle therapy. However, any benefits experienced while taking it—such as increased libido, energy, or mood—will likely diminish once supplementation stops.

Now, if low-T was caused by other factors (stress-induced low T or a basic vitamin or mineral deficiency) and those factors are corrected, T levels may remain elevated.