Where does 350 sit on the scale?
A total testosterone of 350 ng/dL sits in the lower part of the normal range for young men, just above every major cutoff. The harmonized reference range study, built from 9,054 men in four large cohorts, put the numbers this way for healthy, nonobese men aged 19 to 39:
| Benchmark | Value |
|---|---|
| 2.5th percentile (Endocrine Society lower limit) | 264 ng/dL |
| 5th percentile | 303 ng/dL |
| AUA cutoff for low testosterone | 300 ng/dL |
| ISSM level above which deficiency is unlikely | 346 ng/dL (12 nmol/L) |
| Median | 531 ng/dL |
| 97.5th percentile | 916 ng/dL |
The AUA guideline calls 300 ng/dL a reasonable cutoff, and the ISSM patient sheet says that above 346 ng/dL, deficiency is unlikely and further testing is usually unnecessary. So 350 clears both, narrowly. Reference ranges also vary between labs, and the Endocrine Society’s 2026 statement urges labs to use CDC-certified assays because unstandardized tests can give different results on the same sample.
Why repeat the morning test?
Because a single value near a cutoff can land on either side of it on another day. The Endocrine Society’s 2026 statement says diagnosis should rest on at least two early-morning, fasting tests. The AUA asks for two measurements on separate occasions and leaves room for a third when the second disagrees with the first.
A repeat at 280 changes the conversation; a repeat at 450 mostly ends it. Our pages on repeat testosterone testing and morning test timing cover how to set up the draw.
What do free testosterone, SHBG and LH add?
They show whether a borderline total is hiding a real deficiency. Most testosterone travels bound to proteins, and SHBG is the main one. When SHBG runs high, a normal-looking total can leave little free testosterone for tissues to use; when it runs low, a modest total may be adequate.
LH shows how hard the pituitary is pushing. A high LH with a borderline total suggests the testes are struggling to keep up, while a low or normal LH with a borderline total points toward the signal from the brain.
| Pattern at about 350 ng/dL | What it may suggest |
|---|---|
| Normal SHBG, normal free testosterone | Testosterone is probably not the cause of symptoms |
| High SHBG, low free testosterone | Usable testosterone may be low despite the total |
| High LH | Early testicular strain |
| Low or normal LH with low free testosterone | Pituitary or functional cause worth exploring |
Our pages on the free testosterone test and LH blood test explain each marker.
How do symptoms change the decision?
At 350, symptoms carry more weight than the number. A man with low libido, few morning erections and a low free testosterone on repeat testing has a different case from a man whose only complaint is tiredness after poor sleep.
Fixable causes come first in the gray zone. The ISSM notes that weight loss in overweight men, treating sleep apnea and stopping some medicines can raise testosterone on their own. For many men in this range, that is the first plan, with a recheck afterward. Our page on borderline testosterone levels and the companion question on what level qualifies you for TRT go further into how the threshold is applied.
How Ultimate Male handles a 350 result
At Ultimate Male, a 350 is treated as a starting point for questions, not a verdict. Your repeat draw is done in the morning, on site at San Gabriel or Downey, and the provider adds free testosterone, SHBG and LH when the total is borderline, with results in 24 to 48 hours.
The consultation then weighs the full set of numbers against your symptoms and history. If the picture supports testosterone therapy, you will discuss options; if it does not, you get a clear plan for what to address and when to retest. If your labs end up saying no, our page on labs that show no TRT is needed explains what comes next.
