Shows the testosterone your body can actually use, helpful when total levels seem unclear.
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Clinicians order bioavailable testosterone when symptoms do not match a total testosterone result, or when SHBG may be altered. It helps assess androgen status in men and women and can guide follow-up tests or treatment discussions. It is especially useful with thyroid changes, obesity, aging, liver disease, or medicines that affect SHBG. You can test this marker with Aniva across Germany and Finland.
Clinicians order bioavailable testosterone when symptoms do not match a total testosterone result, or when SHBG may be altered. It helps assess androgen status in men and women and can guide follow-up tests or treatment discussions. It is especially useful with thyroid changes, obesity, aging, liver disease, or medicines that affect SHBG. You can test this marker with Aniva across Germany and Finland.
High: May reflect increased androgen activity from supplements, therapy, or conditions like PCOS. Consider reviewing medications and checking related hormones.
Low: Can align with low sex drive, fatigue, or bone health concerns. Common with aging, obesity, chronic illness, or certain medicines. If results are unexpected, an early-morning repeat can help confirm.
Common factors that can skew results include time of day (levels peak in the morning), recent illness, heavy exercise, and alcohol. Medicines and hormones such as testosterone, anabolic steroids, estrogen or oral contraceptives, glucocorticoids, opioids, and anticonvulsants can change SHBG or testosterone. Thyroid, liver, or kidney disease, obesity, and smoking can shift SHBG. High-dose biotin supplements may interfere with some assays.
Special situations: pregnancy, puberty, and gender-affirming therapy may require timing, method adjustments, or confirmation testing.
What does a result mean in plain terms? It estimates the testosterone your body can use. High or low results should be read with your symptoms and related tests.
Do I need to fast? No. A morning sample is best, and avoiding heavy exercise and high-dose biotin beforehand helps.
What can affect my result? Time of day, illness, alcohol, and hard workouts can shift levels. Medicines and hormones can change SHBG, which changes this value.
How often should I test? If results are borderline, repeat on a different morning. If you start or change therapy, your clinician may recheck within weeks to months.
How long do results take? Most labs report within 1–3 business days.
What should I discuss with my clinician? Your symptoms, all medicines and supplements, and whether to check total testosterone, SHBG, and other hormones.
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