Testosterone deficiency

Covers the causes, symptoms, and diagnosis of low testosterone and how it can affect energy, libido, mood, muscle mass, and overall performance. Learn what labs to check, common contributing factors, and evidence-based ways to address deficiency through lifestyle changes and medical options like TRT when appropriate.

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The essentials for testosterone deficiency — then explore the latest posts below.

What is biohacking? A doctor’s guide for men who want measurable health gains

What is biohacking? A doctor’s guide for men who want measurable health gains

Dr. Susan Carter, MD avatar
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Jan 03, 2026 · 11 min read

Biohacking is the practice of using science, self tracking, and targeted lifestyle changes to improve healthspan and lifespan. For men, the best biohacking focuses on sleep, body composition, cardiometabolic health, stress hormones, and lab guided decisions you can actually sustain. “The best biohacking is not extreme. It is repeatable. If you can measure it, recover ...

Is a midlife crisis in men real? What midlife crisis men can do next

Is a midlife crisis in men real? What midlife crisis men can do next

Dr. Jonathan Pierce, PhD avatar
Dr. Jonathan Pierce, PhD: Clinical Psychologist & Neuroscience Specialist
Dec 31, 2025 · 10 min read

A midlife crisis in men is not an official medical diagnosis, but the stress, mood shifts, and health changes many men feel in their 40s and 50s can be very real and very disruptive. The good news is that the “crisis” phase is often a signal to reassess sleep, hormones, purpose, and relationships, then rebuild ...

How to make penis more sensitive: A urologist’s guide to restoring sensation

How to make penis more sensitive: A urologist’s guide to restoring sensation

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 26, 2025 · 13 min read

You can often make your penis more sensitive by changing overstimulating masturbation habits, reviewing medications that blunt sensation, and treating health issues that impair nerve function and blood flow. The key is figuring out whether the problem is “training,” chemistry, circulation, or an underlying condition, then using a simple plan to restore sensation safely. “When ...

Hot flush in males: Causes, symptoms, and treatments that actually help

Hot flush in males: Causes, symptoms, and treatments that actually help

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 01, 2025 · 14 min read

A hot flush in males is most often triggered by a meaningful drop in testosterone that disrupts the brain’s temperature control. The good news is that male hot flashes are common, measurable, and usually treatable once you identify the driver. “When a guy tells me he’s getting sudden heat waves and drenching sweat, I think ...

Medicine 3.0 for men: How to make prevention your default

Medicine 3.0 for men: How to make prevention your default

Dr. Susan Carter, MD avatar
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Nov 25, 2025 · 16 min read

To make prevention your default, Medicine 3.0 focuses on earlier risk testing, tracking trends over time, and making targeted lifestyle and medical changes before disease develops. It shifts the goal from being “normal” on paper to being optimal in real life so you can protect performance now and extend healthspan later. “Medicine 3.0 is the ...

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