How Testosterone Shapes Men’s Health

Testosterone plays a key role in men’s health — supporting strength, vitality, muscle and bone health, sexual function and emotional well-being. But levels naturally decline with age, and symptoms can overlap with other conditions. So how do we know when low testosterone is just part of aging, and when it reflects true testosterone deficiency?

In this episode of Aging Forward, host Christina Chen, M.D., talks with C. Scott Collins, M.D., Medical Director of the Mayo Clinic Men’s Health Clinic, about how testosterone changes over time, when testing makes sense, and what current evidence says about treatment options and safety.

You’ll learn about:
• What testosterone does:
• Muscle strength and mass
• Bone density
• Libido and sexual function
• Metabolic and emotional health

How levels change with age:
• What’s considered “normal”
• Symptoms of low testosterone (low T)
• When symptoms may indicate deficiency

Testing and diagnosis:
• Total vs. free testosterone
• Ideal testing windows
• How sleep, metabolic health and sleep apnea influence levels

Treatment considerations:
• Testosterone replacement therapy (TRT)
• Delivery methods (topical vs. injection)
• Safety data on cardiovascular and prostate health
• Misconceptions about supplements and over-the-counter products

Lifestyle factors that matter:
• Weight and metabolic health
• Sleep apnea treatment
• Exercise and physical activity
• Sleep hygiene

0:00 Introduction: Testosterone and Healthy Aging
1:09 What Testosterone Does Beyond Sexual Health
2:16 When Testosterone Naturally Declines
3:07 Normal Aging Versus Testosterone Deficiency
5:01 Common Symptoms Of Low Testosterone
7:10 Why Testosterone Levels Are Declining
9:21 Primary Versus Secondary Low Testosterone
10:43 When Men Should Be Tested
12:08 How Testosterone Testing Should Be Done
13:27 Additional Hormone Tests And Imaging
15:32 Who Is A Candidate For Treatment
17:09 Testosterone Replacement Therapy Options
19:03 Prescription Therapy Versus Supplements
20:35 Risks And Side Effects Of Testosterone Therapy
22:04 Cardiovascular And Prostate Safety Evidence
24:09 Lifestyle Changes That Improve Testosterone
26:06 Sexual Health, Vitality, And Aging
28:01 Erectile Dysfunction And Testosterone
30:52 Patient Success Stories And Outcomes
32:35 What Healthy Aging Means To Dr. Collins
34:26 Episode Wrap-Up And Listener Resources

Whether you’re curious about testosterone testing, replacement therapy, or supporting men’s health with age, this episode provides science-based insight and practical context.

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