For men, total testosterone reference ranges vary by age. Men under 50 typically see ranges of 300–1,000 ng/dL, with optimal function often reported between 500–900 ng/dL. Men over 50 tend to see ranges of 250–900 ng/dL, with optimal around 450–800 ng/dL. Symptoms matter as much as numbers — a man at 320 ng/dL may feel fine while another at the same level experiences significant fatigue and low libido. For women, testosterone reference ranges are much lower (8–60 ng/dL), with optimal function often between 15–45 ng/dL.

A low testosterone result means your body may not be producing enough to support optimal function. Common symptoms in men include fatigue, low libido, difficulty building or maintaining muscle, brain fog, irritability, and poor sleep. In women, low testosterone often shows as fatigue, low libido, mood changes, and difficulty with muscle tone and recovery. A single low result should be confirmed with repeat testing, since testosterone levels fluctuate throughout the day — morning labs typically return the highest readings.

Free testosterone is the small fraction (roughly 1–3%) not bound to proteins, and directly available for your cells to use. It's possible to have an acceptable total testosterone level while free testosterone is very low — meaning your body has limited access to what it's producing. This is especially common when SHBG is elevated. Reference ranges for free testosterone are 9–30 pg/mL for men under 50, with optimal around 15–25 pg/mL. If your total T is in range but you're still symptomatic, checking free T and SHBG together often reveals the issue.

SHBG (sex hormone-binding globulin) binds testosterone and makes it unavailable for tissue use. When SHBG is high, more testosterone gets bound up — leaving less free testosterone available. The result is low free T symptoms even when total testosterone looks normal. Optimal SHBG for men is roughly 20–45 nmol/L. Very high SHBG (above 57 nmol/L in men) is frequently the underlying cause of symptomatic testosterone deficiency that gets missed on standard panels.

For men, estradiol (E2) should typically fall between 10–40 pg/mL, with optimal around 20–35 pg/mL. Low estradiol in men is just as problematic as high — it affects bone density, cardiovascular health, and mood. Elevated estradiol (above 40 pg/mL) is associated with water retention, reduced libido, and mood changes. For women, estradiol reference ranges depend heavily on cycle phase and menopause status, which is why the checker asks for this information before interpreting your result.

Yes — and it's far more common than most providers acknowledge. Women produce testosterone in the ovaries and adrenal glands, and it plays an important role in energy, libido, muscle maintenance, bone density, and mood. Testosterone declines steadily from a woman's mid-30s onward, often becoming symptomatic around perimenopause. Symptoms include persistent fatigue, significantly reduced sex drive, difficulty building muscle, increased body fat, brain fog, and low mood. Nearly half of WRC's patient base is female, and testosterone is a routine part of female hormone optimization.

As ovarian function declines, the pituitary produces more FSH in an attempt to compensate — so FSH rises as reproductive hormones fall. FSH above 10–12 mIU/mL in a woman under 50 who is still having periods can indicate perimenopause is beginning. FSH above 25–30 mIU/mL suggests perimenopause is well advanced. FSH above 40 mIU/mL is the conventional threshold for confirmed menopause. A single measurement is most useful when evaluated alongside estradiol, symptoms, and cycle history.

It depends on how you feel. Standard lab reference ranges are designed to flag pathology, not to optimize how you function. A result in the lower third of the reference range is technically "normal" — but for many people, that level corresponds with real symptoms. This is the core of WRC's clinical approach: we evaluate where your levels fall within the range alongside how you actually feel. If you're in the suboptimal zone and experiencing matching symptoms, that's worth discussing with a hormone-knowledgeable provider rather than waiting until your levels fall completely below range.

For men, a comprehensive panel should include: total testosterone, free testosterone, SHBG, estradiol (sensitive assay), LH, FSH, PSA (if over 40), CBC, and CMP. Many primary care providers order only total testosterone — missing the markers most often responsible for symptomatic deficiency. For women, a baseline panel should include: estradiol, progesterone, FSH, LH, total testosterone, SHBG, and thyroid panel. Labs are ideally drawn on day 3 of the menstrual cycle for premenopausal women. WRC coordinates comprehensive panels as part of the onboarding process.

No. This tool is for educational purposes only. It compares your self-reported values against published reference ranges and provides general context. It does not account for your full medical history, current medications, symptoms, prior lab trends, or clinical examination — all required for an accurate diagnosis. Results should not be used to start, stop, or change any medical treatment.