EPISODE · Oct 3, 2026 · 12 MIN
Getting Older Barely Lowers Testosterone. So What Does? (Audio)
from The Habit Healers · host Laurie Marbas, MD, MBA
Low testosterone isn’t just about age. If your lab results came back low, you’ve probably been told it’s simply part of getting older. In this episode, I break down what the research actually shows about what lowers testosterone in men, and which changes are tied to the biggest shifts. I count down five common suspects, from the smallest effect to the largest: exercise, a new diagnosis, age, short sleep, and body weight. The research I walk you through followed the same men over four years, which lets us see what happens when one man’s habits change instead of comparing different men at one moment. I also cover a sleep lab study where one week of five-hour nights dropped testosterone more than a decade of aging did. And you’ll hear why weight loss was tied to the biggest rise of all, including what happened when men lost weight on purpose through diet or surgery. If you’re weighing whether to live with low T or start testosterone replacement therapy, I want you to hear this first. There may be more in your control than you think. What you’ll learn: * Why age explains only a small part of declining testosterone in men * How one week of poor sleep can lower testosterone by about 10% * How losing 5% to 10% of your body weight can raise testosterone naturally * The difference between total testosterone, free testosterone, and SHBG * Why more exercise alone didn’t clearly raise testosterone in middle-aged men * A realistic first weight loss target for better men’s hormone health Dr. Marbas Substack Article: https://drlauriemarbas.substack.com/p/getting-older-barely-lowers-testosterone Members can put this into practice with the three-week Points Plan and printable tracker in the companion article. Get full access to The Habit Healers at drlauriemarbas.substack.com/subscribe
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Getting Older Barely Lowers Testosterone. So What Does? (Audio)
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