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Auto-generated transcript of @socalurologyinstitute's video. Quoted here for educational fact-check commentary; original creator retains all rights to the video content.
- 0:00What is SHBG, sex hormone binding globulin?
- 0:04Sounds like a weird name.
- 0:05What is it?
- 0:06Sex hormone binding globulin is a protein
- 0:10that binds up testosterone and makes it inactive.
- 0:13So in our body, we can have a certain level of testosterone
- 0:17and a chunk of it, or part of it, or half of it
- 0:20can be bound up by this globulin, this molecule,
- 0:23called SHBG, and make it inactive.
- 0:26So how do we use sex hormone binding globulin?
- 0:29We use it for the diagnosis of low testosterone.
- 0:32So often men will come in, and sometimes their testosterone,
- 0:35their total testosterone, will look OK, like 500 or 600.
- 0:39But they'll say, I don't feel well,
- 0:41and my doctor only checked my total testosterone.
- 0:44And then we check two additional things.
- 0:46We check the sex hormone binding globulin
- 0:49and the free testosterone.
- 0:51And we find, of the total testosterone,
- 0:54a big part of it was bound up by this molecule,
- 0:57and inactive, and the free testosterone,
- 1:00or the active testosterone, was actually low.
- 1:03And therefore, we say, OK, you're a good candidate
- 1:06to go on testosterone replacement.
- 1:07That's how we use it.
- 1:09Once you're on testosterone, we don't really
- 1:12use sex hormone binding globulin very much.
- 1:15There are these authorities online that
- 1:17will tell you how to lower your SHBG.
- 1:20I don't believe that's true.
- 1:21Some people have higher levels.
- 1:23Some people have lower levels.
- 1:24As we age, the SHBG does increase.
- 1:28But once you're on testosterone, I
- 1:30wouldn't try to take anything to affect or lower or change
- 1:34your SHBG, because I don't think it's effective.
- 1:36It's just a protein that we have in our system.
- 1:39So it's used to make the diagnosis.
- 1:41Otherwise, don't worry about it.
SHBG and testosterone: what the TRT community gets wrong
Quick answer
SHBG is a transport protein that binds testosterone and estradiol, reducing their bioavailability. In clinical practice, measuring SHBG alongside total testosterone allows calculation of free testosterone, which more accurately reflects androgenic status in symptomatic men. The creator correctly identifies this as a diagnostic tool but understates its ongoing relevance during TRT, where SHBG levels can meaningfully affect free testosterone response to treatment.
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This page currently connects to 9 source-backed evidence items through visible references or structured citation data.
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For SHBG and testosterone: what the TRT community gets wrong, FormBlends checks the page topic against primary trials, systematic reviews, guidelines, and current PubMed-indexed literature where available. These citations are context, not medical advice, proof of eligibility, or a claim that every study applies to every patient.
Cardiovascular Safety of Testosterone-Replacement Therapy
TRAVERSE trial anchor for cardiovascular-safety discussions in appropriately diagnosed men.
PubMed
Testosterone therapy in men with androgen deficiency syndromes: an Endocrine Society clinical practice guideline
Guideline anchor for diagnosis, monitoring, contraindications, and appropriate TRT framing.
PubMed
Emerging pharmacotherapies for obesity: A systematic review
Broad context for new and established obesity-drug categories.
PubMed
Glucagon-like receptor agonists and next-generation incretin-based medications
Current review for incretin-based obesity medications and cardiometabolic effects.
PubMed
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SHBG and testosterone: what the TRT community gets wrong is best used to compare access, oversight, pricing, pharmacy quality, and patient support before starting care.
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Keep researching this testosterone and trt video claims cluster
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What this exact clip is really saying
This FormBlends review is specific to "SHBG and testosterone: what the TRT community gets wrong" from Dr Gary Bellman | SoCalUrology. We read the clip as a TRT social video fact-checks claim about Testosterone, then separate the useful signal from what a short social video cannot prove. The page-specific claim focus is: SHBG is a transport protein that binds testosterone and estradiol, reducing their bioavailability.
The reason this review is not generic is the source wording and the canonical claim label "trt what is shbg trt testosteronetherapy testosteronelevels test." In this clip, the useful excerpt is: "What is SHBG, sex hormone binding globulin?" That wording changes the review because it points to Testosterone evidence, safety, and patient-fit context, not a one-size-fits-all protocol.
The source trail for this page is checked against Cardiovascular Safety of Testosterone-Replacement Therapy (2023), Testosterone therapy in men with androgen deficiency syndromes: an Endocrine Society clinical practice guideline (2010), and Functional testosterone deficiency in aging men: Clinical impact, diagnostic pathways, and treatment strategies (2026), plus the creator's own wording. Testosterone decisions still need an eligibility review, medication-interaction screen, access check, and quality-control review before anyone treats a social clip as medical advice.
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Claim being checked
SHBG is a transport protein that binds testosterone and estradiol, reducing their bioavailability.
FormBlends verdict
Testosterone evidence, safety, and patient-fit context
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Source-backed review with clinical or regulatory citations.
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What it helps with
- SHBG is a transport protein that binds testosterone and estradiol, reducing their bioavailability. In clinical practice, measuring SHBG alongside total testosterone allows calculation of free testosterone, which more accurately reflects androgenic status in symptomatic men. The creator correctly identifies this as a diagnostic tool but understates its ongoing relevance during TRT, where SHBG levels can meaningfully affect free testosterone response to treatment.
- Free testosterone, not total testosterone, reflects how much androgen is actually bioavailable. SHBG is required to calculate it accurately (Vermeulen et al., 1999, JCEM).
- Men with symptomatic low testosterone and borderline total T should have SHBG and free testosterone measured. This is consistent with AUA 2018 testosterone deficiency guidelines.
What it may miss
- It may not cover eligibility, contraindications, medication interactions, lab history, or dose escalation.
- Compound access, legal status, and product quality still need a separate safety check.
- Social video captions rarely show the full evidence base behind a claim.
Best next step
Compare the claim against a FormBlends guide, safety page, and licensed-provider review before acting.
Start provider reviewWhat You'll Learn
- Free testosterone, not total testosterone, reflects how much androgen is actually bioavailable. SHBG is required to calculate it accurately (Vermeulen et al., 1999, JCEM).
- Men with symptomatic low testosterone and borderline total T should have SHBG and free testosterone measured. This is consistent with AUA 2018 testosterone deficiency guidelines.
- SHBG rises with age, meaning older men can have normal total T but clinically low free T. This is not a niche edge case.
- SHBG does not become irrelevant on TRT. Men with high SHBG may need different dosing strategies to achieve adequate free testosterone levels.
- Abnormally high SHBG can signal liver disease, hyperthyroidism, or certain medication use. It is worth investigating the cause, not just the number.
- Most online advice about lowering SHBG through supplements lacks randomized controlled trial support. Skepticism is warranted, though the blanket claim that SHBG cannot be modified is not accurate.
- Obesity lowers SHBG and can cause total testosterone to appear falsely reduced. SHBG interpretation always requires clinical context.
Our take · Written by FormBlends editorial team · Reviewed by FormBlends Medical Team · This is not a transcript. It is our independent review of the video above.
What did @socalurologyinstitute actually say?
The urologist behind this account gave a pretty clean explainer on sex hormone binding globulin. SHBG, they said, is a protein that binds testosterone and renders it "inactive." They argued it matters most during diagnosis, when a man's total testosterone looks fine on paper but his free testosterone is actually low. Once someone is on TRT, though, they dismissed SHBG monitoring and said online advice about lowering it is not effective: "I don't believe that's true." Their bottom line was simple: use it to make the diagnosis, then ignore it.
The framing is aimed squarely at men who've been told their testosterone is normal but still feel symptomatic. That's a real and underserved conversation. But some of the nuance got lost.
Does the science back this up?
Mostly, yes. The role of SHBG in obscuring true androgen status is well-documented, and the criticism of over-relying on total testosterone alone is legitimate. Where things get murky is the claim that SHBG becomes irrelevant once TRT starts.
SHBG does bind testosterone and estradiol with high affinity, leaving only free and albumin-bound fractions bioavailable. The Vermeulen formula, widely used in clinical practice, uses SHBG to estimate free testosterone precisely because total T is often misleading (Vermeulen et al., 1999, Journal of Clinical Endocrinology and Metabolism). That part the creator got right.
On the "don't worry about it after TRT" point, the evidence is more complicated. A 2020 study in JCEM found that SHBG levels influence free testosterone response to TRT and that men with high SHBG may need higher doses to achieve equivalent free T levels (Finkelstein et al., 2020, JCEM). That's not a trivial detail to dismiss. SHBG also fluctuates with liver function, thyroid status, obesity, and medications, all of which can shift during TRT management.
What did they get wrong (or right)?
They got the diagnostic framing right. Using SHBG alongside free testosterone to evaluate symptomatic men with borderline total T is standard-of-care thinking, consistent with the American Urological Association's 2018 testosterone deficiency guidelines.
Where I'd push back: saying "I don't think it's effective" to lower SHBG is an opinion dressed as settled science. Some interventions do shift SHBG. Danazol, stanozolol, and certain androgens lower it measurably, though those carry real risks. Even lifestyle changes like weight loss and resistance training modestly reduce SHBG in obese men (Winters et al., 2014, Clinical Endocrinology). The creator is probably right that most online "SHBG hacks" are overhyped. But the blanket dismissal oversimplifies things.
They also didn't mention that elevated SHBG can be a symptom of something else worth investigating, like liver disease, hyperthyroidism, or anticonvulsant use. That's a missed clinical teaching moment.
What should you actually know?
SHBG is a clinically meaningful variable, not just a diagnostic checkbox. If your total testosterone looks normal but you're symptomatic, asking your provider to check both SHBG and free testosterone is a reasonable and evidence-backed request.
That said, the creator's skepticism about aggressively "optimizing" SHBG on TRT is defensible. There's no strong randomized controlled trial evidence showing that lowering SHBG in TRT patients improves outcomes like energy, libido, or body composition independently of free testosterone levels. Most of the enthusiasm for SHBG manipulation comes from bodybuilding forums, not peer-reviewed endocrinology.
If you're on TRT and your provider isn't checking free testosterone or SHBG at all, that's a conversation worth having. If you're healthy and someone is trying to sell you a supplement stack to "crush your SHBG," be skeptical. And if your SHBG is abnormally high or low, ask why, because it might point to something systemic that's worth addressing on its own terms.
- Normal SHBG range is roughly 10-57 nmol/L in adult men, though labs vary.
- SHBG rises with age, which is one reason older men often have lower free T even with acceptable total T.
- Obesity lowers SHBG, which can make total testosterone appear falsely low in overweight men.
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About the Creator
Dr Gary Bellman | SoCalUrology · TikTok creator
12.2K views on this video
What is SHBG? #trt #testosteronetherapy #testosteronelevels #testosterone #shbg
Frequently asked questions
Quick answers based on this video and our medical team review.
What does the video say about free testosterone, not total testosterone, reflects how much?
Free testosterone, not total testosterone, reflects how much androgen is actually bioavailable. SHBG is required to calculate it accurately (Vermeulen et al., 1999, JCEM).
What does the video say about men with symptomatic low testosterone?
Men with symptomatic low testosterone and borderline total T should have SHBG and free testosterone measured. This is consistent with AUA 2018 testosterone deficiency guidelines.
What does the video say about shbg rises with age, meaning older men can have normal?
SHBG rises with age, meaning older men can have normal total T but clinically low free T. This is not a niche edge case.
What does the video say about shbg does not become irrelevant on trt. men with high?
SHBG does not become irrelevant on TRT. Men with high SHBG may need different dosing strategies to achieve adequate free testosterone levels.
What does the video say about abnormally high shbg can signal liver disease, hyperthyroidism,?
Abnormally high SHBG can signal liver disease, hyperthyroidism, or certain medication use. It is worth investigating the cause, not just the number.
What does the video say about most online advice about lowering shbg through supplements lacks randomized?
Most online advice about lowering SHBG through supplements lacks randomized controlled trial support. Skepticism is warranted, though the blanket claim that SHBG cannot be modified is not accurate.
Sources & references
Citations extracted from our medical team's review. Click any citation to search PubMed.
Not medical advice. This video was made by Dr Gary Bellman | SoCalUrology, not by FormBlends. Our write-up above is an editorial review, not a medical recommendation. Talk to your doctor before making any decisions about medications or treatments.