When you get your testosterone tested, your doctor looks at the result and compares it to a “normal range.” If your number falls within that range, you’re told everything is fine. But here’s what most men — and many doctors — don’t understand: normal is not the same as optimal. And for your quality of life, health, and performance, optimal is what matters.
How “Normal” Ranges Are Determined
Laboratory reference ranges for testosterone are determined by measuring hormone levels in a population sample and defining “normal” as the range that encompasses roughly 95% of the population. This statistical approach has a fundamental flaw: the population sample includes everyone — sedentary men, obese men, men with untreated health conditions, and men who are experiencing age-related decline. “Normal” by this definition just means “similar to the average population,” which in the context of modern health, is not a particularly high bar.
The question isn’t whether your testosterone falls within the bottom 95% of the population. The question is: where do you personally feel and function best?
The Difference Between Normal and Optimal
Most labs define the normal range for total testosterone as approximately 300-1,000 ng/dL. This is a 3x range. A man at 310 ng/dL is “normal.” A man at 900 ng/dL is also “normal.” But these two men are experiencing vastly different physiological realities.
Optimal testosterone — the level at which most men feel their best, have the most energy, clearest thinking, strongest libido, best body composition, and most robust mood — is typically in the upper third of the normal range or above, depending on the individual. For many men, that means 600-900 ng/dL or higher.
A man at 310 who was at 700 five years ago has lost more than half his testosterone. His doctor may tell him he’s “normal.” His body is telling him something else entirely.
Why Free Testosterone Matters as Much as Total
Total testosterone measures all testosterone in the blood, including testosterone bound to SHBG (sex hormone binding globulin) and albumin. Only “free” testosterone — the unbound fraction, typically 1-3% of total — is biologically active and available for use by cells. A man can have a normal total testosterone but low free testosterone if his SHBG is elevated, which produces the symptoms of deficiency despite technically adequate total levels.
An evaluation that only measures total testosterone and stops there is incomplete. Free testosterone and SHBG must be included in any meaningful assessment of hormonal status.
Symptoms Over Numbers
The most clinically relevant approach is to evaluate both the lab values and the symptomatic presentation together. A man at 400 ng/dL who feels great, has high energy, and is asymptomatic may not need intervention. A man at 400 ng/dL who is exhausted, depressed, and experiencing sexual dysfunction may be a clear candidate for evaluation and possible treatment. The numbers inform the picture; they don’t complete it.
The Full Truth About Male Hormonal Health
The systemic gaps in how the medical establishment evaluates and addresses male hormonal health — and what men can do about it — are exposed in full in The Secret Hormone Therapy Epidemic by Joshua Crampton. Required reading for every man who wants to take genuine control of his health.