High SHBG Fix: Thyroid Check + Proviron/Anavar Protocol Explained

High SHBG: Check Your Thyroid Before You Touch Anything Else

SHBG is a protein your liver makes, and its job is to grab hold of sex hormones in your blood and carry them around, which sounds harmless until you realize that hormone bound to SHBG is not doing anything for you, since it just sits there parked and unavailable. Your total testosterone can read 900 and your free testosterone can read like you are 70 years old, and the number sitting between those two is SHBG.

So when someone comes to me frustrated that their labs look great on paper but they feel flat, the first question is not what to add. It is what is driving the SHBG up in the first place.

If you haven't gotten a thyroid panel, subclinical hyperthyroidism does cause elevated SHBG and that would be something that you need to manage at the thyroid, not on your HPG axis.

Thyroid hormone tells the liver how much SHBG to produce, and when thyroid output runs high, even quietly high, liver production of SHBG climbs with it. Brenta and colleagues measured this directly and found SHBG elevated in hyperthyroid patients and reduced in hypothyroid patients, tracking thyroid status rather than gonadal status.

What matters in that finding is the word subclinical, because your TSH can be suppressed while your T4 and T3 still sit inside the reference range, so nobody flags anything, and you spend six months adjusting your testosterone protocol chasing a problem that lives one organ over.

That is the whole reason the thyroid panel comes first. If the thyroid is the driver, everything you do at the HPG axis is working against a current.

Now if the thyroid is clean and you are on anabolics and SHBG still isn't managed, you are dealing with a liver that is simply producing a lot of it.

There are two things that you can add that are going to help compete with that receptor to mitigate the binding of your testosterone.

The first is proviron. You can do 25 to 50 milligrams per day and the second is a low dose of anivore which will be like 10 milligrams a day for a dude and adding those for a period of time will also help to get your SHBG levels in check. Saartok and colleagues measured relative binding affinities and found that mesterolone and its metabolites bind SHBG with high affinity, which is the mechanism behind the displacement idea: a compound that occupies SHBG leaves less of it available to bind your testosterone.

On the oxandrolone side, I cannot point you to a study showing it competes at the SHBG binding site the way proviron does, or that a low dose lowers SHBG outright. I use it at 10 milligrams because of what I see with clients over an eight to twelve week window, and that is anecdotal.

Which is worth saying plainly, because the mechanism and the outcome are two different claims. Displacement changes how much of your existing testosterone is free right now. It does not change how much SHBG your liver is making.

So if the underlying driver is still running, you are managing a symptom, and the moment you stop the compound the number climbs back.

That is why the sequence matters more than the compounds. You start with the thyroid panel, and once that is settled you look at what else pushes SHBG up, because low body fat, aggressive caloric restriction, and certain medications all nudge it the same direction. Then, if the driver is genuinely nothing you can fix upstream, you add proviron at 25 to 50 milligrams and hold it there for a defined block rather than forever.

Most people treat SHBG as a testosterone problem because it shows up on a testosterone panel. It is a liver output problem, and the liver is taking instructions from somewhere else.

Research: Brenta G, and colleagues published Variations of sex hormone-binding globulin in thyroid dysfunction in Thyroid in 1999, and Saartok T, and colleagues published Relative binding affinity of anabolic-androgenic steroids in Endocrinology in 1984.

References:

Brenta G, Schnitman M, Gurfinkiel M et al.. Variations of sex hormone-binding globulin in thyroid dysfunction. Thyroid. 1999. https://pubmed.ncbi.nlm.nih.gov/10211604/

Saartok T, Dahlberg E, Gustafsson JA. Relative binding affinity of anabolic-androgenic steroids: comparison of the binding to the androgen receptors in skeletal muscle and in prostate, as well as to sex hormone-binding globulin. Endocrinology. 1984. https://pubmed.ncbi.nlm.nih.gov/6539197/