Palmetto Preventive
Laboratory test

Testosterone, Free

Measures the unbound, biologically active portion of testosterone.

About this test

Free testosterone estimates or measures the small portion not bound to blood proteins.

Common reasons for testing

  • Clarifying symptoms when total testosterone and binding-protein levels need further evaluation.

These are examples of clinical uses. Your history and symptoms determine whether testing is appropriate.

What to expect

A small blood sample is taken from a vein in your arm. You may feel a brief pinch and have mild bruising. Tell the person collecting your sample if you have fainted with needles or take a blood thinner; keep pressure on the site afterward.

Appointment length

Your visit is expected to take about 15 minutes at our West Ashley location.

Categories

Men's HealthWomen's HealthHormone Health

Preparation

  • Confirm the collection time and whether fasting is needed; morning collection is often used when investigating testosterone deficiency.
  • Tell the team about hormone treatment, contraception, supplements, pregnancy, and the first day of your last period, if applicable.
  • Ask whether a particular collection time or menstrual-cycle day is needed for your clinical question.
  • Bring a list of medicines and supplements, including biotin, vitamins, and hormones. Do not stop or change prescribed medicines unless your clinician tells you to.

Instructions for this appointment

  • A morning appointment is recommended, since levels for this test can vary throughout the day.

Follow the instructions confirmed for your order. If they differ from the general guidance, contact the team before changing food, fluids, or medicines.

Order requirement

No outside order needed

Understanding your results

  • Measurement methods differ. Interpretation should include total testosterone, SHBG, and the clinical question.

What happens next?

Review the report with your clinician alongside your symptoms, medical history, and earlier results. A value outside the reference range does not always mean disease, and a normal result does not explain every symptom. Confirm who will arrange any repeat or additional testing.

Sources & further reading

This patient summary draws on published clinical literature and professional guidance. Patient resources are identified separately below. Preparation also depends on your specific order and the collecting laboratory or imaging team.

Content updated October 11, 2026. General education; individual advice comes from your care team.

Transparent pricing

Know the cost before your visit

Palmetto Preventive is a direct-pay service. You will see clear payment terms before your booking is finalized — no surprise lab bill.

Self-pay price

$50.00

One transparent price for this test. Payment terms are presented before your booking is finalized.

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Our pricing promise

Transparent self-pay pricing — you see the price before you book.

No surprise lab bill after your visit.

If testing is not approved, your payment is refunded in full.

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