How to prepare for TSH Männer

Preparing for a TSH test in men is similar to women. TSH follows a circadian rhythm, peaking in the early morning, so blood draw is ideally done fasting between 7–9 AM. No special diet is required, but avoid biotin supplements (common in hair/skin/nail formulas) for 2–3 days before, as they can falsely lower TSH. Stress, sleep deprivation, and acute illness can transiently alter TSH levels. For a comprehensive thyroid assessment, free T4, free T3, and thyroid antibodies (TPO, Tg) should be included. Note: This is general medical practice, not specific to men. Evidence level: practice (standard clinical guidance). No direct study from the provided context supports this, but it is widely accepted. Always follow your physician's instructions.