FEATURED21:9
The nitric oxide pathway, explained — without hand-waving
An erection is mostly about blood flow. That's true, but it's the short answer. Here's the long one, from endothelium to orgasm.
Section
The Science.
Research, mechanism, and measurement. We report on the biology of men's sexual and metabolic health with citations, plain language, and no marketing.
IMG4:3
Sleep apnea is the most under-diagnosed cause of low libido. By a wide margin.
IMG4:3
What morning wood actually tells you about your cardiovascular health.
IMG4:3
A new meta-analysis on porn use and erectile response in men 18–35.
IMG4:3
Why measuring testosterone once tells you almost nothing.
IMG4:3
The ten-year safety data on daily tadalafil, in one chart.
IMG4:3
Endothelial dysfunction precedes ED by an average of 3.8 years.
IMG4:3
Why SSRIs cause sexual side effects — and which ones are safer.
IMG4:3
A skeptical look at the latest TRT-and-cardiovascular-risk paper.
IMG4:3
The pelvic floor is an organ system. We keep forgetting.
IMG4:3
Waist circumference is a better ED predictor than BMI.
IMG4:3