RPA Health

Nobody's testosterone crashes overnight. It drifts.

One to two percent per year after age thirty. By forty-five that can be a fifteen to twenty percent loss. And every annual physical along the way reads "normal."

Here's why. The reference range, three hundred to one thousand nanograms per deciliter, was derived from a broad population study.

That study included sedentary men, older men, and metabolically compromised men.

The range was designed to flag disease, not to describe optimal function in a high-output forty-year-old.

So a result of 420 in a forty-something professional is technically "in range."

It's also in the bottom quartile of a range that should not have applied to him in the first place. That is not a clean bill of health.

That is a thirty percent gap from his likely functional ceiling, hiding inside the word "normal."

The drift is upstream-governed.

The HPA axis under chronic load drives the pattern.

Testosterone, thyroid, and recovery follow.

I walk the full model in the Performance Gap Webinar on Saturday May 30, 10am Central.

Registration link in the comments.

Family history is a risk signal. It's not a verdict.

Your gene expression is being written in real time by your inputs:

nutrition, training, sleep, recovery, inflammation.

The clinician who tells you "It's Genetic, Nothing You Can Do" is using a model that predates the field that explains what is actually happening in your body.

Full breakdown in this week's Performance Brief.

Read the article and subscribe at the link in bio.