Testosterone 101

Everything you need to know about testosterone, backed by the latest research. We turn complex topics like diagnosis, dosing, delivery methods, and lab results into simple, practical insights. Understand TRT benefits and risks, maintain estradiol balance, and spot drug interactions - all grounded in evidence, not hype.

Moobs or gynecomastia? How to get rid of man boobs with the right diagnosis

Moobs or gynecomastia? How to get rid of man boobs with the right diagnosis

Dr. Susan Carter, MD avatar
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Nov 21, 2025 · 15 min read

You can get rid of man boobs by first confirming whether you have excess chest fat, true gynecomastia, or a combination, then matching the fix to the cause. The fastest path is usually a smart fat loss plan plus full body strength training, but glandular breast tissue often requires a medical approach. “When a guy ...

Tongkat ali and fadogia agrestis: Do men get a real testosterone boost or extra risk?

Tongkat ali and fadogia agrestis: Do men get a real testosterone boost or extra risk?

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Nov 20, 2025 · 10 min read

Tongkat ali has human evidence suggesting it can raise testosterone in some men, but fadogia agrestis has no human testosterone studies and a less defined safety profile. If you are considering fadogia agrestis and tongkat ali together, you need to understand what is proven, what is speculation, and where the side effect risk may rise. ...

Does nicotine increase testosterone or quietly wreck it?

Does nicotine increase testosterone or quietly wreck it?

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Nov 20, 2025 · 10 min read

In observational studies, male cigarette smokers average about 15% higher total testosterone and 13% higher free testosterone than non-smokers, likely because nicotine alters liver hormone metabolism and slows testosterone breakdown. That “smoker’s paradox” can still coincide with erectile dysfunction and infertility as smoking damages blood vessels and testosterone-producing Leydig cells, so higher lab numbers don’t ...

TRT side effects. Facts and myths.

TRT side effects. Facts and myths.

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

TRT side effects most often include acne or oily skin, higher hematocrit, fluid retention, and reduced fertility, and they are usually manageable with appropriate dosing and monitoring. Here is a clear, evidence-based guide to testosterone replacement side effects and how to manage them safely. “Most problems blamed on TRT are preventable. The real risk 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 ...

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