Testosterone Levels by Age — What's Normal for Your Age?

You got your bloodwork back and your testosterone is 380 ng/dL. Is that low? Normal? Depends who you ask — and that's the problem.

The "normal" reference range on most lab reports is absurdly wide: 264-916 ng/dL (Quest) or 250-1100 ng/dL (LabCorp). These ranges are based on the entire male population regardless of age. A 70-year-old and a 25-year-old are held to the same standard. That's statistically lazy and clinically misleading.

What's Actually Normal by Age

Here's a more useful breakdown based on clinical data:

Ages 20-30: Peak testosterone years. Average total testosterone is typically 600-900 ng/dL. Free testosterone (the biologically active portion) is at its highest.

Ages 30-40: Testosterone begins declining at roughly 1-2% per year starting around age 30. Average: 500-750 ng/dL. Most men don't notice symptoms in this range.

Ages 40-50: Average drops to 400-650 ng/dL. This is where some men start noticing changes — decreased energy, reduced libido, difficulty building muscle, increased body fat around the midsection.

Ages 50-60: Average: 350-550 ng/dL. Symptoms become more common. The decline isn't just total testosterone — SHBG (sex hormone-binding globulin) increases with age, which means less free testosterone is available even if total numbers look adequate.

Ages 60-70+: Average: 300-500 ng/dL. Many men in this range have clinically significant symptoms but have been told their levels are "normal for their age."

The Problem With "Normal for Your Age"

"Your testosterone is normal for your age" is one of the most common — and most frustrating — things a doctor can tell a patient.

Here's why it's problematic: age-adjusted reference ranges are descriptive, not prescriptive. They tell you what's typical for men your age. They don't tell you what's optimal for your body, your symptoms, or your quality of life.

A 50-year-old man with a total testosterone of 320 ng/dL is technically within the lab's reference range. He's also likely experiencing fatigue, low libido, brain fog, muscle loss, increased body fat, and depressed mood. Telling him his levels are "normal" while he feels terrible is not good medicine.

Total vs. Free Testosterone

Most standard panels only check total testosterone. But total testosterone includes:

• Free testosterone (~2-3% of total) — directly available for use by tissues
• SHBG-bound testosterone (~40-60%) — bound to sex hormone-binding globulin and essentially inactive
• Albumin-bound testosterone (~35-55%) — loosely bound, partially available

Free testosterone is what matters clinically. You can have a total testosterone of 550 ng/dL but if your SHBG is elevated (which happens with age, liver disease, thyroid issues, and certain medications), your free testosterone might be functionally low.

This is why a complete hormone panel should include: total testosterone, free testosterone, SHBG, estradiol, LH, FSH, and a complete blood count. Anything less is an incomplete picture.

When Low Testosterone Needs Treatment

The diagnosis of hypogonadism (low testosterone requiring treatment) isn't just a number. It's the combination of:

1. Low serum testosterone — generally below 300 ng/dL total, though many clinicians use free testosterone as a more sensitive marker
2. Consistent symptoms — fatigue, reduced libido, erectile dysfunction, depression, decreased muscle mass, increased body fat, brain fog, poor sleep
3. Exclusion of other causes — thyroid dysfunction, sleep apnea, depression, medication side effects, and chronic illness can all mimic low T

If you have the symptoms AND the numbers, you're a candidate for treatment. If you have one without the other, the picture is less clear and requires more investigation.

What Causes Testosterone to Drop

Beyond normal aging:

Primary hypogonadism — the testes themselves aren't producing enough testosterone. Causes include testicular injury, infection (mumps orchitis), Klinefelter syndrome, chemotherapy/radiation, or undescended testes.

Secondary hypogonadism — the brain (pituitary/hypothalamus) isn't sending the right signals. Causes include obesity (a major one — fat tissue converts testosterone to estrogen via aromatase), opioid use, pituitary tumors, excessive alcohol, head trauma, or anabolic steroid use (which suppresses natural production).

Lifestyle factors that accelerate decline:

• Obesity (the single biggest modifiable factor)
• Chronic stress and elevated cortisol
• Poor sleep (testosterone is produced primarily during deep sleep)
• Excessive alcohol
• Sedentary lifestyle
• Processed food diets high in sugar and seed oils

The Optimization Conversation

There's a growing conversation around testosterone "optimization" — treating men whose levels aren't technically deficient but who feel suboptimal and want to function at a higher level.

This is where medicine gets nuanced. There's a difference between treating a man with a total T of 220 (clearly low) and treating a man with a total T of 480 who wants to feel 25 again. Both are valid conversations, but they carry different risk-benefit calculations.

TRT has real benefits: improved energy, mood, libido, body composition, bone density, and cognitive function. It also has considerations: potential fertility impact, need for ongoing monitoring, erythrocytosis risk, and the fact that once you start, your natural production suppresses and you may need treatment indefinitely.

What to Do If You're Concerned

Get a proper panel — not just total testosterone at a random time of day. Testosterone should be drawn in the morning (before 10 AM), fasting, and ideally confirmed with a second draw if the first result is low. Include free T, SHBG, estradiol, LH, FSH, CBC, and metabolic panel.

Then have a real conversation about what the numbers mean in context of your symptoms, your age, your goals, and your overall health.

At Coral, we don't just check a box and say "you're normal." We look at the full picture and have an honest conversation about your options. [Start here](/start).

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