Testosterone and Penis Size: The Truth, the Myths, and the Medical Realities

Let’s talk about the question lingering in locker rooms and Reddit forums alike: Does testosterone increase penis size? And while we’re at it, let’s unravel what testosterone really does for your sexual development, especially during puberty. Spoiler alert: No, chugging protein shakes and screaming at your gym mirror won’t change your size below the belt.

This guide dives deep into testosterone and male development, penis growth during puberty, and what happens if your hormones go off script. We’ll also debunk the wildest myths about testosterone therapy and penis size while spotlighting what actually helps (hint: no magic pills here).

Testosterone is the MVP of male hormones. Produced mainly in the testes (plus a dash from the adrenal glands), it fuels everything from muscle growth to voice deepening to—you guessed it—sexual development.

Here’s what it influences:

• Testosterone and male development : Think facial hair, deeper voice, testicle and penis growth

• Fertility and libido : Vital for sperm production and sex drive

• Mood and energy : Low testosterone can leave you tired, moody, and feeling off

• Muscle and bone health : Important for staying strong and solid

Ah, puberty. That awkward, hormone-fueled rollercoaster from childhood to adulthood. This is the window where testosterone levels skyrocket, usually between ages 9 and 14, and kick off all the hallmark changes of becoming a man.

Including:

• Testicle enlargement

• Penis growth during puberty

• Voice deepening and hair sprouting everywhere

Here’s the catch: testosterone and penis size are absolutely linked during puberty. But once the curtains close on adolescence (around ages 16 to 18), the penis is done growing. You can’t force a sequel.

Short answer: No.

Long answer: Once puberty is over, your penis size is pretty much set. Boosting your testosterone with supplements or injections won’t turn you into a late-blooming porn star.

However, testosterone and erectile function are connected. Low testosterone symptoms can include trouble getting or keeping an erection, but that’s about performance, not size.

Your penis size isn’t just a hormone thing—it’s in your DNA. Even if you had testosterone levels off the charts during puberty, your genetic blueprint determines the maximum potential. So while testosterone supports growth, it’s the genetic architects running the show.

As men age, testosterone levels gradually decline. Here’s a quick peek at normal levels:

• Teenagers : 300–1,200 ng/dL

• Adults (20s–30s) : 600–700 ng/dL is average

• After 40 : Gradual decline of about 1% per year

This decline can lead to male hormone imbalance, resulting in symptoms like fatigue, low libido, and even mood swings. But again, no changes in penis size. Sorry, fellas.

Hypogonadism is the medical term for low testosterone, and it can happen at any age. If it hits during puberty, it can absolutely impact penis and testicle development. If it hits later in life, it won’t shrink your penis, but it will mess with your sex drive, energy, and fertility.

Signs of low T include:

• Low libido

• Fatigue

• Trouble with erections

• Low sperm count

• Decreased muscle mass

• Depression or irritability

• Testicular shrinkage (yes, really)
• Lower natural testosterone production
• Acne and mood swings
• Heart risks
• Infertility due to reduced sperm production

So if you’re picturing TRT as the secret to a larger penis, pump the brakes. Testosterone therapy and penis size are not friends.

If you are struggling with sexual performance or confidence, a better place to start might be Popstar Delay Spray. You know, a tool that actually improves sex now, not a pipe dream.

In rare cases like Klinefelter syndrome (when a person has an extra X chromosome), testosterone levels may be low from the start. This can lead to smaller testes and penis size if untreated during puberty. Early diagnosis and hormone therapy can help kickstart development.

Let’s get real. Most guys who are worried about penis size are well within the normal range. The anxiety often stems from unrealistic porn standards and locker room comparison games.

The average erect penis? Around 5.16 inches. And trust us, your partner likely cares more about confidence, connection, and stamina than hitting some imaginary measurement goal.

If confidence is your concern, Popstar Volume + Taste Supplement might give your bedroom game a little edge where it actually counts.

If you're looking to maintain strong testosterone levels the natural way, start here:

• Lift heavy : Resistance training boosts testosterone

• Sleep more : Less than 6 hours? Say goodbye to balanced hormones

• Eat smart : Ditch processed food. Go for protein, healthy fats, and leafy greens

• Chill out : Chronic stress floods your system with cortisol, which tanks testosterone

• Drop excess fat : Belly fat turns testosterone into estrogen

Testosterone is essential for sperm production, but too much supplemental testosterone can reduce sperm count. That’s because it throws off the natural signals from the brain to the testes.

If you suspect low testosterone, or you’re dealing with delayed puberty, infertility, or chronic fatigue, it might be time for a medical check-in.

Hormone testing can uncover:

• Hypogonadism

• Klinefelter syndrome

• Other male hormone imbalances

If necessary, your provider may recommend testosterone replacement therapy (TRT), but it should always be tailored to your health goals—not vanity metrics.

So does testosterone increase penis size? Not once you're past puberty. But testosterone does impact your mood, energy, performance, and libido—things that actually matter in the bedroom.

Instead of chasing inches, focus on feeling good, staying healthy, and making sure your hormones are in balance. And if you need a little boost in the bedroom, Popstar’s got you covered with supplements that deliver where it counts.