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Men's Health  ·  The Free-Testosterone Report

His Bloodwork Said “Normal.” He Felt Anything But.

Only about 2% of a man's testosterone is actually usable. A little-known protein handcuffs the rest — and researchers are studying five nutrients that may help free it.

Editorial Reviewed against published research
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He is 44. He still trains four days a week — has for most of his adult life. Nothing about his routine changed. What changed is that it stopped working. The lifts stalled. The recovery dragged. Somewhere around three in the afternoon a wall would come down that coffee couldn't touch, and by evening the drive that used to be automatic just… wasn't there.

So he did the responsible thing. He asked his doctor for bloodwork. Full panel. He waited a week for the results, half-expecting — maybe even half-hoping — for a number that would explain it.

The results came back. Totally normal.

Which is its own kind of frustrating. Because “normal” on paper and “normal” in your body had stopped being the same thing. His testosterone was in range. He was not imagining the crash, the flatness, the sense that the engine was turning over but never quite catching. The lab said one thing. His life said another.

It turns out both were right. And the reason why is a piece of physiology that almost never makes it into a standard appointment.

The number nobody reads

There are two testosterone numbers. Your panel probably showed you the wrong one.

When a standard panel reports “testosterone,” it almost always means total testosterone — every molecule in the sample, counted together. It's the headline figure, and it's the one that came back fine.

But total testosterone includes a large fraction that your body cannot actually use. The portion that does the work — builds muscle, sharpens drive, lifts mood and energy — is the part circulating unbound, on its own. That's free testosterone. And in a typical man, it's a sliver of the total.

What the panel measures
~98%
Total testosterone — most of it bound and inactive
What your body can use
~2%
Free testosterone — unbound, biologically active
// A "normal total" can hide a low free fraction. The panel never flags it.

This is the “aha” that changes the whole picture. You can have a perfectly respectable total number and still run low on the only fraction that matters — and unless free testosterone was specifically ordered and measured, nothing on the report would ever say so.

So the real question isn't “am I making enough testosterone?” For most active men in their 40s, the answer is yes. The real question is: why can't I use more of it?

Meet the handcuffs

A protein called SHBG locks your testosterone away — and it climbs as you age.

The reason so much of your testosterone sits idle has a name: sex hormone binding globulin, or SHBG. It's a protein made mostly in the liver, and its job is to grab onto testosterone in the bloodstream and hold it. Testosterone bound to SHBG is locked — it can't enter cells, can't dock where it needs to, can't do a single thing you want it to do.

A little SHBG is normal and necessary. The problem is what happens over time. SHBG tends to rise with age — and it climbs faster under chronic stress, poor sleep, and the metabolic drift that creeps up on a lot of men after 40. More SHBG means more of your testosterone gets grabbed and held, which means less of it circulates free, even when your total production hasn't dropped at all.

Picture your testosterone as money in a vault. You've still got the money. But the vault door has been quietly getting heavier for years — and SHBG is holding the key.

Bound vs. Free  ·  why “normal total” can still leave you running on empty
BOUND · LOCKED AWAY grabbed by SHBG · inactive FREE · USABLE T free to work · ~2%
Same total testosterone. The steel rings are SHBG holding most of it hostage — only the gold on the right is free to do anything.

This reframes the entire goal. The conventional advice — “boost your testosterone” — aims at production, when for a lot of men the bottleneck isn't production at all. It's access. The more useful question is whether anything can help shift the balance back toward free: keep SHBG from grabbing quite so much, and let more of what you already make actually circulate.

That's exactly where a small body of nutrient research has been pointing.

Before you read on
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What the research studies

Five nutrients researchers have looked at — and the exact doses used.

A handful of nutrients keep coming up in the research on free testosterone, SHBG, and the stress hormones that push testosterone down. None of this is a cure, and none of it is a drug. What follows is what the studies examined, at the doses they examined — nothing more.

Tongkat Ali
400 mg Stress hormone · free-T

The most-studied of the group. In stressed adults, standardized Tongkat Ali extract has been examined for its effect on the cortisol-to-testosterone ratio, with research reporting shifts toward lower stress-hormone exposure and higher free testosterone.1,2 It's the ingredient with the strongest free-T signal behind it.

Boron
6 mg SHBG · free-T

The direct SHBG story. In a small human study, roughly one week of supplemental boron was associated with a decrease in SHBG and a rise in free testosterone — one of the few nutrients studied specifically for the bound-versus-free balance this page is about.3

Shilajit
250 mg Healthy-male study

Purified shilajit has been studied in healthy men over a multi-week period, with published research reporting effects on total and free testosterone versus placebo.4 A mineral-rich compound with a small but specific human dataset.

Zinc
15 mg T maintenance

The foundational mineral. Zinc is essential to normal testosterone production, and research has linked deficiency to reduced levels — making adequate intake a maintenance question, not a boosting one.5 Most useful for filling a gap rather than pushing past normal.

BioPerine
10 mg Absorption

The utility player. Standardized black pepper extract (piperine) has been studied for its ability to improve the absorption of nutrients taken alongside it6 — included so the rest of the formula has the best chance of actually being taken up.

Every claim above describes research on the individual ingredient, at the listed dose. Full citations appear at the bottom of this page.

The trust problem

Why most testosterone supplements quietly waste your money.

Here's the uncomfortable part of this category. Plenty of products contain the right-sounding ingredients — and still do nothing, because of two industry habits that are easy to hide behind a nice label.

How most are built
  • “Proprietary blend” — a single total, so you never see any individual dose
  • Doses pixie-dusted far below what the research actually used
  • Impressive ingredient list; unknowable amount of each
  • Marketing aimed at making more — ignoring whether you can use it
How Rise is built
  • Full-disclosure label — every ingredient, every milligram, printed
  • Doses set to the clinical range the studies examined
  • Five actives, nothing hidden, nothing to “blend” away
  • Built around free testosterone — access, not just output

A proprietary blend isn't a formulation choice — it's a way to avoid telling you how little of the good stuff is in the jar. If a label won't show you the dose, you can't check it against the research. That single difference — shown doses, at studied amounts — is the whole reason a formula is worth taking or not.

The Free-Testosterone Formula
XWERKS RISE
Built around the fraction that actually works.
Tongkat Ali 400mg Boron 6mg Shilajit 250mg Zinc 15mg BioPerine 10mg
★★★★★ 4.8 / 5  ·  verified buyers
★★★★★ Marcus D. Verified
“47, been lifting my whole life. First supplement in this category where I noticed the afternoon didn't flatten me out. Wish I'd found it a few years ago.”
★★★★★ James R. Verified
“What sold me was the label. Every dose printed, no ‘blend.' I could actually look up the numbers against the studies. Different feel by week three.”
★★★★★ Tom V. Verified
“My total was always ‘fine' on labs but I felt off. This is the first thing that lined up with what my body was telling me. Drive and gym motivation are back.”
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Straight answers

The questions men actually ask.

Is this TRT or a steroid?

No. Rise is not testosterone-replacement therapy, and it contains no hormones, prohormones, or steroids of any kind. It's a supplement made of five nutrients — Tongkat Ali, boron, shilajit, zinc, and BioPerine — that have been studied individually for their relationship to testosterone and the stress hormones around it.

TRT is a prescription medical treatment that introduces testosterone from outside the body. This is not that. If you're considering TRT, that's a conversation for your doctor.

How long before I'd notice anything?

Nutrient-based formulas work gradually, not overnight. The human studies behind these ingredients generally ran over multiple weeks, and most people should think in terms of consistent daily use across four to eight weeks rather than a next-day effect. Taking it consistently matters more than taking it occasionally.

Who shouldn't take it?

Rise is intended for healthy adult men. If you're under 18, if you have a diagnosed medical condition, if you take prescription medication, or if you're being treated for anything hormone-related, talk to your doctor before starting — as you should with any new supplement. This product is not intended for women who are pregnant or nursing.

Can I stack it with Ashwa?

Yes — and there's a logic to it. If SHBG is one lever on your free testosterone, chronic stress and cortisol are another, since elevated stress hormones work directly against testosterone. XWERKS Ashwa is built around full-spectrum ashwagandha, which is studied for exactly that stress side of the equation. Running Rise for the free-T angle and Ashwa for the cortisol angle is a common pairing. Both use full-disclosure labels, so you can see everything you're taking.

What makes Rise different from the shelf?

Two things. First, the label: every ingredient and every milligram is printed, with no proprietary blend hiding the amounts. Second, the framing: Rise is built around free testosterone — the usable fraction — rather than the total-production number most products chase. Same category, different target.