One of the most common questions men ask after getting a testosterone test is: "Is my number normal?" The answer is almost always technically yes, because "normal" laboratory reference ranges are broad by design. But "normal" and "optimal" are not the same thing, and understanding the difference is essential for anyone taking their hormonal health seriously.
What Laboratory Reference Ranges Actually Mean
The reference range printed on your lab report is derived from the testosterone levels measured in a large population of healthy adult men. The range typically spans from approximately 300 to 1,000 ng/dL (10.4 to 34.7 nmol/L) for total testosterone.
Any result within this range is considered "normal" by the laboratory, meaning it falls within the statistical distribution of the measured population. But this range includes men at the bottom 2.5 percent of that population, and men at various life stages with a wide range of health status.
A man who measured 750 ng/dL at age 30 and now measures 315 ng/dL at age 45 is "technically normal" according to the reference range, but has experienced a clinically significant 58 percent decline. The reference range does not capture this individual context.
Testosterone by Age: What to Expect
Testosterone naturally declines with age at approximately 1 to 2 percent per year after the mid-30s. General reference points for average total testosterone in healthy men:
| Age Group | Average Total Testosterone (ng/dL) | |---|---| | 20-30 years | 600-900 | | 30-40 years | 500-800 | | 40-50 years | 400-700 | | 50-60 years | 350-600 | | 60+ years | 300-500 |
These are averages, not optimal targets. Individual variation is substantial.
Total Testosterone vs Free Testosterone: Why Both Matter
Total testosterone measures all testosterone in the blood, including testosterone bound to sex hormone-binding globulin (SHBG) and albumin. Only free testosterone - unbound and available to enter cells - is biologically active.
SHBG levels increase with age and in certain conditions (high oestrogen, thyroid dysfunction, liver disease). A man with "normal" total testosterone of 500 ng/dL but elevated SHBG may have very low free testosterone and significant symptoms.
Free testosterone normal range: approximately 50 to 210 pg/mL for men aged 20 to 50, declining with age.
Both markers should always be tested together. Total testosterone alone is insufficient.
What Are Optimal Testosterone Levels?
Clinical guidelines focus on thresholds for treatment, but many physicians in men's health practice distinguish between:
- Deficient: Total testosterone below 300 ng/dL - clear indication for treatment
- Low-normal: 300 to 450 ng/dL - treatment warranted if symptomatic
- Adequate: 450 to 700 ng/dL - generally sufficient for most men without major symptoms
- Optimal: 600 to 900 ng/dL - associated with best body composition, metabolic health, libido, and energy outcomes
Men in the "adequate" range but symptomatic may benefit from optimisation, depending on their free testosterone, SHBG, and clinical picture.
The Full Panel: What Longegra Tests
A testosterone number in isolation is rarely sufficient. Longegra's male hormone panel includes:
- Total and free testosterone
- SHBG (to interpret binding and free fraction)
- LH and FSH (to determine cause: primary vs secondary hypogonadism)
- Oestradiol (conversion of testosterone to oestrogen; important in overweight men)
- Prolactin (rules out pituitary adenoma)
- IGF-1 (assesses GH axis function)
This complete picture is what allows accurate clinical interpretation and appropriate treatment selection.
Frequently Asked Questions (FAQs)
Yes. Symptoms matter alongside numbers. If you are symptomatic (low energy, reduced libido, muscle loss, mood changes) with a testosterone level at the lower end of the reference range, a physician review is warranted. The reference range does not account for your individual baseline or symptom burden.
