- Low testosterone often shows up as low drive, low energy, low mood and slow muscle gain.
- Symptoms overlap with poor sleep, stress and thyroid issues, so testing is the only way to know.
- Test in the morning, and ask for free testosterone too, not just total.
It's easy to blame age, work or bad sleep when your energy and drive fade. Sometimes that's right. Sometimes it's your hormones. This 60-second check helps you decide whether it's worth testing.
Insyght measures total, free and bioavailable testosterone plus estradiol in one morning draw, reviewed by a physician. $199 a year.
The 60-second low-T self-check
In the past few months, have you noticed:
Many other issues cause these symptoms too, so a blood test is the only way to know.
It's not ruled out, though. If a symptom is bothering you, testing can still give you peace of mind.
This check is for education only and isn't a diagnosis.
Symptoms by body system
- Brain: low mood, poor focus, low motivation
- Energy: fatigue, afternoon crashes
- Sexual health: low libido, erection changes
- Muscle and bone: strength loss, lower bone density
- Metabolism: belly fat, higher blood sugar
How symptoms differ in men and women
| Men | Women | |
|---|---|---|
| Most common signs | Low libido, erection changes, fatigue, muscle loss | Low libido, fatigue, low mood |
| Also seen | Belly fat, lower bone density, fewer morning erections | Loss of muscle tone, lower bone density, sleep changes |
| Low level (typical lab) | Below about 264 to 300 ng/dL total | Lab ranges vary; low values are harder to define |
| Common life stage | Gradual decline from the 40s | Around perimenopause and menopause |
The American Urological Association defines low testosterone in men as below 300 ng/dL, paired with symptoms.
Common causes of low testosterone
- Often reversible: poor sleep or sleep apnea, excess body fat, heavy drinking, chronic stress, opioid use and some other medications
- Health conditions: type 2 diabetes, thyroid problems, high prolactin and pituitary disorders
- Other factors: normal aging, past testicular injury and some genetic conditions
How to test testosterone the right way
- Book your draw before 10 a.m., when levels peak
- Fast overnight for the rest of your panel
- Get total and free testosterone, not just total
- Include estradiol, since the balance matters
- Retest a low result on a second morning before any treatment decision
- Test thyroid, glucose and ferritin, which cause similar symptoms
Insyght's panel covers every item on this list.
When to see your physician
If two morning tests come back low and you have symptoms, a physician can look for the cause and walk you through options. Testosterone therapy can reduce sperm production, so tell your physician if you want children. Lifestyle changes like better sleep, strength training and weight loss can raise levels on their own.
Frequently asked questions
What age does testosterone start to drop?
Can low testosterone be fixed without medication?
Do women need testosterone testing?
Insyght tests total, free and bioavailable testosterone, estradiol, thyroid, glucose and 100+ more markers in one draw, with a physician review. $199 a year.
Keep reading
How we read 100+ biomarkers against optimal, not just the population average.
The panelWhat we testEvery biomarker in the Insyght Core Panel, across 10 body systems.
60 secondsThe Baseline CheckEight questions to see which of your systems deserves a closer look.
