Erectile dysfunction

Explore the causes, prevention, and treatment options for erectile dysfunction, including the roles of hormones, cardiovascular health, and lifestyle factors. Learn how optimizing testosterone levels and overall wellness can help restore and maintain sexual function.

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Does testosterone affect how long you last? The science of stamina

Does testosterone affect how long you last? The science of stamina

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 19, 2025 · 12 min read

Testosterone mainly supports libido and erectile function, but it does not directly increase Intravaginal Ejaculatory Latency Time (typically about 5 to 7 minutes) because ejaculation timing is largely a serotonin-mediated neurological reflex. Low testosterone can still make you feel like you are finishing “too fast” by destabilizing erections and creating a rush-to-finish pattern. Here is ...

Estrogen in men: Low Estradiol can ruin your TRT therapy

Estrogen in men: Low Estradiol can ruin your TRT therapy

Dr. Susan Carter, MD avatar
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Oct 26, 2025 · 14 min read

Low estradiol can derail TRT even when testosterone looks “normal,” because aromatase converts testosterone into estradiol and some men develop symptoms when estradiol is pushed to the low end (for example, around 20 pg/mL in controlled research using sensitive testing). Learn the key signs, the right lab test to order, and how to fix low ...

Choosing the best testosterone replacement therapy clinic for you

Choosing the best testosterone replacement therapy clinic for you

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Aug 08, 2025 · 15 min read

The best TRT clinic is one that confirms true hypogonadism with both symptoms and repeat labs (often a consistently low morning total testosterone, commonly around 300 ng/dL depending on the lab and assay, and/or low free testosterone on an appropriate test) and then matches the dose, delivery method, and monitoring plan to your health risks. ...

How testosterone replacement therapy injections can boost your mood

How testosterone replacement therapy injections can boost your mood

Dr. Jonathan Pierce, PhD avatar
Dr. Jonathan Pierce, PhD: Clinical Psychologist & Neuroscience Specialist
Aug 08, 2025 · 13 min read

In men with symptomatic hypogonadism (total testosterone consistently below roughly 264 to 300 ng/dL, depending on the lab assay and reference range), testosterone injections that restore levels to the mid normal range can modestly improve mood and vitality by increasing androgen signaling in brain reward and emotional balance circuits. Here’s who’s most likely to benefit, ...

Your guide to effective testosterone replacement therapy near me

Your guide to effective testosterone replacement therapy near me

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Aug 06, 2025 · 14 min read

Evidence-based testosterone replacement therapy is most likely to help men who have consistent low‑T symptoms plus repeatedly low morning testosterone, confirmed with solid lab testing. Guidelines vary, but many use a total testosterone threshold around 300 ng/dL, while “borderline” results (for example, roughly 300 to 350 ng/dL) may require closer interpretation based on symptoms, assay ...

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