Why Your Testosterone Numbers Might Be Lying to You

Welcome to HeydayMD Health Talk. I'm your host, and today we're talking about why your testosterone numbers might be lying to you and what actually matters when you look at your lab results.

So, you go to the doctor and get a testosterone test. Usually, you get back one single number. That is your total testosterone.

But here is the catch... that number measures all the testosterone in your blood. And about ninety-eight percent of that is actually bound to proteins.

That means it is stuck. It is unavailable for your body to use.

Only about two to three percent of your testosterone is what we call free. This means it is unbound and biologically active.

So what does that actually mean?

Well, this free fraction is what actually enters your cells. It is what binds to receptors and produces the effects you actually want... like energy and muscle tone.

Think of it like this... total testosterone is like your gross salary. Free testosterone is your take-home pay.

One looks great on paper... but the other is what you actually have to live on.

Now, you might be wondering what is locking all that testosterone away. It is something called sex hormone-binding globulin... or S-H-B-G.

This is a protein made by your liver that binds onto testosterone tightly. About sixty-five to eighty percent of your total testosterone is locked up this way.

Another twenty to thirty percent is loosely bound to a protein called albumin.

That leaves just two to three percent truly free at any given time.

The tricky part is that S-H-B-G levels change based on a lot of things... like your age... your body weight... your liver health... and even your thyroid.

This is why two guys can have the exact same total testosterone number but feel completely different.

One guy might have low S-H-B-G, so he has plenty of free testosterone available.

The other guy has high S-H-B-G, which means he has very little free testosterone... even though his total number looks fine.

So, when does that total number lie to you?

The most common scenario is in men with elevated S-H-B-G. We see this a lot with aging or certain liver conditions.

Imagine a man with a total testosterone of five hundred nanograms per deciliter. That sounds pretty good, right?

But if his S-H-B-G is high... say, sixty nanomoles per liter... his actual free testosterone might be the same as a guy with a total of only three hundred.

Both of these men are going to feel the symptoms of low testosterone... but on a standard test, only the second guy looks like he has a problem.

On the flip side, men struggling with obesity or insulin resistance often have very low S-H-B-G.

They might have a low total testosterone number, but their free testosterone is actually adequate.

This is why you have to look at both numbers to get the real story.

So, what should you be looking for?

For most adult men, the optimal range for free testosterone is generally nine to twenty-five picograms per milliliter.

If you are below nine picograms per milliliter, you are probably going to feel it... no matter what your total number says.

Most men find their sweet spot is between fifteen and twenty-five picograms per milliliter.

That is where you usually see the best results for your energy... your libido... your body composition... and your focus.

When you get your next hormone panel, make sure you ask for both total and free testosterone.

It is also a good idea to check your S-H-B-G and albumin levels to get the full picture.

You should never make decisions about hormone therapy based on that total number alone.

If any of this resonated, check out heydaymd dot com to learn more, or take the free quiz to see where you stand. Thanks for listening to HeydayMD Health Talk. Take care of yourselves, guys.