The Curbsiders Internal Medicine Podcast · The Curbsiders Internal Medicine Podcast

REBOOT: #462 Male Hypogonadism Pearls with Dr. Bradley Anawalt: Insights on Testosterone Deficiency

·1 hr 32 min·5 clips

He says direct free testosterone assays are 'worthless' and may be wrong in 30% of patients.

1. The Curbsiders Internal Medicine Podcast revisits male hypogonadism and testosterone testing with Dr. Bradley Anawalt. 2. Matthew Franko and Paul Williams host the episode, and Bradley Anawalt serves as the guest endocrinologist because he studies male infertility, male hormonal contraception, and male reproductive physiology. 3. The episode asks how to decide whether a man with fatigue, weight gain, or low energy really has testosterone deficiency. 4. Anawalt says the first step is to ask what the patient is trying to achieve before ordering a testosterone level. 5. He says libido is the most specific symptom of new hypogonadism, while erectile dysfunction, concentration problems, and fatigue are less specific. 6. He notes that men with congenital hypogonadism or Klinefelter syndrome may not report a libido problem because they never had a normal baseline. 7. He recommends measuring waist circumference and watching for sleep apnea clues such as a thick neck and elevated body mass index. 8. He advises drawing testosterone between 7 and 10 a.m. because that is when levels are highest and because reference ranges are built from healthy young men tested in that window. 9. He says fasting for at least 6 hours can raise serum testosterone by as much as 50 nanograms per deciliter. 10. He says bona fide hypogonadism with an identifiable cause occurs in less than 0.5 percent of men. 11. He recommends hematocrit, testosterone, FSH, and LH as the main labs, with TSH added when thyroid disease is a concern. 12. He uses hematocrit both to look for anemia and to help decide whether sleep apnea workup is needed. 13. He says high FSH and LH suggest primary hypogonadism, while low or normal values suggest hypothalamic or pituitary disease. 14. He explains that obesity and underweight can suppress the hypothalamic-pituitary-gonadal axis through leptin-related pathways. 15. He tells patients that sedentary lifestyle and too much abdominal fat can lower testosterone and that exercise plus weight loss can improve the number. 16. He cites a two-year Australian trial in about 1,000 men at high risk for diabetes, where quality-of-life measures improved in proportion to weight loss rather than testosterone assignment. 17. The discussion is practical, clinical, and case-based, with the hosts repeatedly stopping to clarify lab interpretation and patient counseling. 18. Anawalt speaks in plain language, uses a drawn-out physiology explanation when needed, and gives specific counseling language for sex drive and lifestyle change. 19. Clinicians who see middle-aged men with obesity, fatigue, or borderline testosterone would get the most from this episode. 20. Readers looking for entertainment or nonclinical content probably should skip it.

As heard by us

A practical, lab-first look at testosterone deficiency that favors clarity over hype.

The discussion treats testosterone deficiency as a clinical problem to sort through, not a slogan to repeat. It moves from gym banter into careful lab interpretation, with attention to total testosterone, free testosterone, and SHBG.

Read the full review in PlayNext →

Why you'd press play

You want the testosterone workup without the bro-science.

Read the full recommendation in PlayNext →

Listen to the show on

Apple Podcasts Spotify

Play clips from this episode More from The Curbsiders Internal Medicine Podcast