Dr. Gluck’s Wellness Center

Dr. Gluck’s Wellness Center ✍️ Stanford, UCLA Med School + Harvard Uro
👨‍⚕️Board-Certified Urologist and Sexual Wellness MD
💼 Private Practice - Boston, MA
(2)

04/29/2026

Why Men Over 40 Struggle With Sleep: The Hormone Connection Explained

Stop blaming your mattress.

If you’re a man over 40 and you’re not sleeping well, there’s a good chance the issue is hormonal.

Testosterone isn’t just about s*x drive or muscle.

It plays a critical role in brain stability and sleep regulation.

As testosterone declines:

• GABA activity decreases (the brain’s calming signal)
• Cortisol remains elevated at night
• Sleep becomes fragmented

The result?

👉 You feel exhausted… but wide awake.

That “tired but wired” feeling is not just stress.

It’s often neuroendocrine imbalance.

And here’s where it becomes a cycle:

Low testosterone → poor sleep → even lower testosterone

So how do you break it?

First: Address testosterone levels when appropriate.

Restoring testosterone to physiologic levels, not abusing it - can improve:

✔ Sleep depth
✔ Sleep continuity
✔ Nighttime recovery

Second: Magnesium matters.

Forms like magnesium glycinate or threonate support:

• GABA signaling
• Nervous system calm
• Reduced nighttime overstimulation

Third: Use melatonin correctly.

Melatonin is not a sedative, it’s a circadian timing signal.

Low dose, properly timed use helps reset sleep cycles.

The takeaway:

Sleep is not just about being tired.

It’s a coordinated system between your brain and your hormones.

Fix the system and sleep follows. 😴

04/27/2026

GLP-1 Weight Loss: Are You Losing Fat or Muscle? What the Science Shows

Everyone is talking about GLP-1 medications for weight loss.

But here’s the question that matters:

Are you losing fat… or muscle too?

Because weight loss is not the same as body recomposition.

GLP-1 medications like semaglutide and tirzepatide work centrally:

• Suppress appetite
• Slow gastric emptying
• Improve insulin sensitivity

This leads to meaningful weight loss, often 10–20% of total body weight.

But there’s a tradeoff.

Studies suggest that 25–40% of that weight loss can come from lean mass if it’s not actively protected.

That means:

⚠️ Loss of muscle
⚠️ Lower metabolic rate
⚠️ Reduced long-term resilience

Now compare that to growth hormone physiology.

Growth hormone works differently:

• Mobilizes stored fat (especially visceral fat)
• Activates fat metabolism
• Supports muscle preservation via IGF-1

So instead of just losing weight…

👉 You improve body composition

Classic and modern studies have shown:

• Reduction in visceral fat
• Preservation of lean mass
• Improved metabolic profiles

But here’s the reality:

Exogenous growth hormone is not appropriate for most patients.

So the smarter question is:

How do we activate this physiology naturally?

Here’s what matters:

💤 Sleep
Deep sleep drives the largest growth hormone pulses

🏋️ Resistance training + HIIT
Short bursts of intensity stimulate GH release

🍽 Insulin control
High insulin suppresses growth hormone

🥩 Protein intake
Supports muscle and IGF-1 signaling

So what’s the takeaway?

GLP-1 medications can be incredibly effective…

…but you have to protect muscle.

Because the goal is not just weight loss.

It’s losing the right weight.

References:
• Rudman D et al., NEJM, 1990
• Johannsson G et al., JCEM
• Takahashi Y et al., Endocrine Reviews
• Godfrey RJ et al., Sports Medicine

04/24/2026

Does Estradiol Increase Clot Risk? What ELITE, DOPS, and REPLENISH Actually Show

When we talk about estrogen and clotting risk, we have to be extremely precise.

Because much of the fear comes from studies that did not actually use estradiol.

They used:

• Conjugated equine estrogens
• Synthetic progestins

Both of which behave differently in the body.

So the real question is:

What does the data show for oral 17-beta estradiol itself?

Let’s look at the major trials.

ELITE Trial

A randomized controlled trial using oral estradiol to study vascular effects.

From a safety standpoint:

• Serious adverse events were low
• No significant increase in thrombotic events compared to placebo

Important note: the study was not powered for rare events like VTE—but there was no signal suggesting increased clotting risk.

DOPS Trial:

One of the few long-term randomized datasets examining estrogen therapy.

Findings:

• Venous thrombosis was not increased in women receiving estrogen

This provides strong clinical reassurance when evaluating estradiol-based therapy.

REPLENISH Trial:

Often misunderstood.

This study used oral estradiol combined with progesterone.

Results:

• One DVT event out of over 1,600 patients
• Below expected background rates

Follow-up analysis showed changes in coagulation markers but:

👉 These were mechanistic changes, not clinical clotting outcomes.

So what does the totality of the data show?

✔ Oral estradiol does affect liver signaling
✔ It does alter coagulation proteins

But:

❗ Across ELITE, DOPS, and REPLENISH
there is no consistent or convincing clinical signal that oral estradiol increases venous thromboembolism.

The key takeaway:

The historical concern about clotting risk comes largely from:

• Non-estradiol estrogens
• Synthetic progestins

When you isolate estradiol, the data looks different.

This allows us to shift the conversation from fear → to physiology.

And ultimately:

👉 Use the right therapy for the right patient

References:
• ELITE Trial (Early vs Late Intervention Trial with Estradiol)
• DOPS Trial (Danish Osteoporosis Prevention Study)
• REPLENISH Trial (Estradiol + Progesterone Study)

04/22/2026

Normal A1c But Still a Metabolic Problem? Understanding Hidden Glucose Dysregulation

Here’s something we’re seeing more and more and it often hides in plain sight:

You can have a normal A1c, normal fasting glucose, even a strong HOMA-IR…

…and still have a metabolic problem.

Why?

Because those labs are static.

But your physiology is dynamic.

When we use a continuous glucose monitor, we often see a very different pattern.

After meals:

📈 Glucose spikes above 140 (sometimes higher)
📉 Then drops quickly, sometimes into the 60s or 50s

This is not classic insulin resistance.

This is something earlier and more subtle:

Hyperinsulinemic glucose dysregulation.

In simple terms:

Your body is overreacting.

You eat → glucose rises → insulin is released
But instead of a smooth response…

⚠️ Too much insulin
⚠️ Too fast
⚠️ Glucose crashes

That’s why people feel:

• Shaky
• Tired
• Anxious
• Wake up in the middle of the night

And this can happen even when labs look “perfect.”

Now layer in hormones.

Hormones play a major role in metabolic stability:

• Testosterone helps muscle take up glucose and smooth insulin response
• Progesterone supports stability
• Estrogen increases sensitivity but needs balance

When these are off, glucose swings become more pronounced.

So what do we do?

We stop chasing numbers—and start stabilizing physiology.

Practical strategies:

🥩 Eat protein first
🥦 Add fiber
🍞 Carbs last

This alone can reduce glucose spikes.

Avoid rapid, refined carbohydrates they trigger aggressive insulin responses.

Consider timing:

🌙 A small protein + fat snack before bed can help prevent overnight drops.

Support the system:

• Magnesium
• Careful use of agents like berberine (not for everyone)

And most importantly:

👉 Look at patterns, not snapshots

Because your body is not a single lab value.

It’s a dynamic system.

And when you stabilize that system you improve energy, resilience, and long-term metabolic health.

04/20/2026

TULSA vs HIFU for Prostate Cancer: What the Data Actually Shows

There’s a lot of excitement right now around TULSA for prostate cancer.

But we need to slow down and look carefully at the data.

Some early reports comparing TULSA to radical prostatectomy showed that about half of men maintained both continence and erectile function at six months.

That sounds encouraging. But that is not the real clinical question.

The real question is:

How does TULSA compare to modern focal therapies like HIFU?

Because HIFU has already demonstrated the ability to treat prostate cancer while preserving function at a high level.

And this is where the data becomes more nuanced.

In the multicenter TACT trial, TULSA showed:

• 92% pad-free continence at one year
• 75% baseline potency preservation
• 21% of men with clinically significant cancer on follow-up biopsy

That means roughly 1 in 5 men still had meaningful cancer after treatment.

More recent prospective data is even more concerning:

• 43.5% of patients had clinically significant cancer at 12 months

In other words, nearly half of patients still had important cancer present.

Now compare that with hemigland HIFU data:

• 100% pad-free continence in U.S. series
• Strong preservation of erectile function
• 91% of men avoided radical treatment at two years

Broader focal therapy reviews show:

• ~95%+ pad-free continence
• Up to 98–99% in some datasets
• Strong preservation of erectile function in properly selected patients

So the big picture is this:

TULSA may be less invasive than radical prostatectomy.

But that does not automatically make it the best focal therapy option.

When compared to HIFU, the data suggests:

✔ Stronger functional outcomes
✔ More consistent cancer control
✔ Lower rates of persistent disease

This matters because patients are not just choosing between surgery and no treatment.

They are choosing between technologies.

And if one option shows persistent clinically significant cancer in 20–40% of patients, that is not a small difference.

TULSA deserves continued study.

But based on current evidence, HIFU remains a more compelling focal therapy platform for properly selected men with localized prostate cancer.

Because in prostate cancer treatment:

Function matters.
Cancer control matters.
And persistence matters most of all.

References:
• Renal & Urology News
• TACT Trial (SAGE Journals)
• Prospective TULSA data (PubMed)
• U.S. Hemigland HIFU Series (Tema Sinergie)
• Focal Therapy Reviews (ScienceDirect)

04/15/2026

Triglyceride-to-HDL Ratio: The Hidden Marker of Insulin Resistance and Metabolic Health

When most people look at their cholesterol panel, they focus on total cholesterol or LDL.

But there’s another number that can give powerful insight into metabolic health and insulin resistance.

It’s called the triglyceride-to-HDL ratio.

Here’s why it matters.

Triglycerides and HDL cholesterol tend to move in opposite directions when metabolism becomes unhealthy.

As insulin resistance develops:

• Triglycerides rise
• HDL cholesterol falls

This happens because insulin resistance changes how the liver processes fat.

The liver produces more VLDL particles, which are rich in triglycerides. At the same time, triglycerides are transferred into HDL particles, making them unstable and leading to faster clearance.

The result is a very specific pattern:

High triglycerides + Low HDL

One simple way to assess this is by calculating the ratio:

Triglycerides ÷ HDL

For example:

• Triglycerides = 150
• HDL = 50
• Ratio = 3

General interpretation:

✔ Below 2 → Associated with good metabolic health
⚠️ Above 3 → May suggest insulin resistance
🚨 Higher values → Often reflect significant metabolic dysfunction

This ratio also correlates with small, dense LDL particles, which are more likely to contribute to atherosclerosis.

What makes this especially useful is that it responds quickly to lifestyle changes.

You can improve this ratio with:

🏋️ Exercise
🥗 Nutrition changes (reducing sugar and refined carbs)
😴 Better sleep
🐟 Omega-3 intake
⚖️ Weight reduction

In that sense, this ratio is more than just a number. It’s a window into how your body is handling energy, insulin, and fat metabolism.

04/09/2026

Shingles Explained: Why the Virus Never Leaves Your Body and Why Vaccination Matters

You may have heard about shingles recently, but most people don’t realize what it actually is.

Shingles is caused by the reactivation of the varicella-zoster virus, the same virus that causes chickenpox.

That virus never leaves your body.

After childhood infection, it remains dormant in the nervous system for decades.

As we age, the immune system, especially T-cell function, becomes less effective at keeping the virus suppressed.

When that happens, the virus travels along a nerve and causes:

• Pain
• Inflammation
• A blistering rash in a specific pattern

But shingles is not just a skin condition.

It is nerve inflammation.

Many patients experience severe burning or shooting pain before the rash even appears.

And in some cases, that pain can persist for months or even years - a condition known as postherpetic neuralgia.

There’s also growing evidence that shingles is associated with:

• Increased risk of stroke
• Increased cardiovascular events in the months following infection

The good news is that we now have a highly effective vaccine.

Shingrix can reduce the risk of shingles by over 90% and significantly lower the risk of long-term nerve pain.

This is supported by strong clinical evidence.

A randomized controlled trial published in the New England Journal of Medicine demonstrated over 90% efficacy across all age groups, including adults over 70.

Because of this, the CDC recommends vaccination for all adults over age 50, even if they’ve had shingles before.

When we talk about aging well, this isn’t just about comfort.

It’s about maintaining immune control over viruses that have been living inside the body for decades.

References:
• Lal H, et al. NEJM, 2015
• CDC / ACIP Guidelines (Shingrix Recommendations)

04/06/2026

Does Testosterone Raise Blood Pressure? The Physiology Behind TRT and Hypertension

Testosterone and blood pressure is an area that creates a lot of anxiety, but the physiology tells a different story.

Testosterone is not a primary hypertensive hormone.

In fact, at the vascular level, testosterone has vasodilatory effects, meaning it helps blood vessels relax. This occurs through:

• Nitric oxide signaling
• Direct smooth muscle relaxation

These effects are associated with:

✔ Improved endothelial function
✔ Better insulin sensitivity
✔ Reduced visceral fat

All factors that support long-term cardiovascular health.

So why do some men notice a rise in blood pressure after starting testosterone therapy?

The mechanism is indirect, not toxicity.

Testosterone can increase red blood cell production (erythropoiesis), which raises hematocrit.

In some individuals, especially with higher or infrequent dosing, this can slightly increase blood viscosity and lead to a modest rise in blood pressure.

Testosterone can also cause mild fluid retention, particularly early in therapy.

This is typically:

• Temporary
• Dose-dependent
• Much less significant than other hormone therapies

Delivery method also matters.

Large, infrequent injections can create high peaks, which may increase:

• Hematocrit
• Fluid shifts

More stable delivery methods like:

• Lower-dose, more frequent injections
• Transdermal therapy
• Oral testosterone undecanoate

Tend to produce smoother levels and fewer fluctuations.

So what’s the takeaway?

Testosterone-associated blood pressure changes are:

✔ Predictable
✔ Monitorable
✔ Manageable

Management includes:

• Using physiologic dosing
• Avoiding large peaks and troughs
• Monitoring hematocrit
• Optimizing sleep and hydration
• Treating sleep apnea
• Addressing insulin resistance
• Adjusting delivery when needed

And when necessary, standard blood pressure treatments can be used.

In properly selected patients, testosterone therapy does not cause dangerous or progressive hypertension.

If blood pressure rises, it’s usually:

➡️ Mild
➡️ Reversible
➡️ Manageable

The real issue is not testosterone itself—

It’s how it’s prescribed and monitored.

04/02/2026

Levothyroxine vs Natural Thyroid: Why T4 Alone Doesn’t Work for Every Patient

One of the most common questions I hear:

“Why do endocrinologists prescribe levothyroxine instead of natural desiccated thyroid?”

To understand that, we have to start with physiology.

The thyroid gland produces mostly T4, which is a prohormone, and a smaller amount of T3, the active hormone that drives:

• Metabolism
• Energy
• Brain function
• Cardiovascular performance

The body is designed to convert T4 into T3 using enzymes called deiodinases.

So in theory, giving T4 alone should allow the body to produce exactly the amount of T3 it needs.

That idea led to the widespread use of levothyroxine.

But historically, that’s not how thyroid disease was treated.

For decades, patients were treated with natural desiccated thyroid, which contains both T4 and T3 - and many patients did very well.

So what changed?

Two major developments:

• The discovery that T4 converts to T3
• The development of the TSH blood test

This shifted treatment toward lab-based management, where normalizing TSH became the primary goal.

Levothyroxine became the standard because it is:

✔ Stable
✔ Consistent
✔ Easy to monitor

And for many patients, it works very well.

But not for everyone.

Some patients do not convert T4 to T3 efficiently.

They may have:

• Normal TSH
• Normal T4
• But persistent symptoms

Including:

⚠️ Fatigue
⚠️ Brain fog
⚠️ Weight resistance
⚠️ Low mood

In these cases, thyroid hormone levels may be normal in the blood, but not at the tissue level.

Natural desiccated thyroid or T4/T3 combination therapy introduces active T3 directly.

But there are tradeoffs:

• The T4:T3 ratio differs from human physiology
• T3 has a shorter half-life
• Levels can fluctuate if not dosed carefully

So endocrinology has favored levothyroxine because it works reliably across large populations.

But the real question is not:

“Natural vs synthetic.”

The real question is:

Are we restoring thyroid physiology or just normalizing a lab value?

For many patients, levothyroxine is exactly the right treatment.

But for others, a more individualized approach may better match their physiology.

And that’s where thoughtful, patient-centered care matters.

03/30/2026

A question I hear all the time:

“I’m already past menopause… is it too late to start hormone therapy?”

The answer is:

No. But it has to be done thoughtfully.

First, we need to separate older data from modern practice.

The Women’s Health Initiative studied hormone therapy using non-physiologic hormones in women who were often more than 10 years past menopause.

That is very different from what we commonly use today.

Today, we often use bioidentical estradiol, which behaves differently in the body.

Next, the route of administration matters.

Oral estradiol:

• Passes through the liver (“first-pass metabolism”)
• Can improve lipid metabolism
• May have favorable effects on cholesterol

Transdermal estradiol (patches, creams):

• Bypasses the liver
• Has less impact on clotting factors
• Is often preferred in women with higher cardiovascular or clotting risk

So which is better?
It depends on the patient.

• If the goal is metabolic support → oral may have advantages
• If the goal is minimizing clot risk → transdermal is often preferred

Now let’s address a major concern: blood clots.

For most healthy women, the absolute risk remains low.

However, we are more cautious in women with:

• Prior clotting events
• Known thrombophilia
• Strong family history of thromboembolic disease

So what’s the takeaway?

It is not “too late.”

But hormone therapy is not one-size-fits-all.

With the right hormone, the right route, and the right patient selection, estradiol can still be part of a thoughtful strategy to support vascular and metabolic health - even later in menopause.

References
• Women’s Health Initiative
• Hodis & Mack, Timing Hypothesis, JACC
• Canonico M et al. Transdermal vs Oral Estrogen and VTE Risk, Circulation

03/26/2026

Most people think of estradiol as a female hormone. But in men, estradiol is essential for both libido and erectile function.

Here’s the key point:

Testosterone is not acting alone.

Testosterone is converted in the body, especially in the brain, into estradiol by an enzyme called aromatase. 🧠

That conversion is not a side effect. It is a required step in normal male physiology.

Let’s start in the brain.

Libido begins centrally.

When testosterone enters the brain, it is converted to estradiol, which then activates receptors in key areas like the hypothalamus, regions that regulate s*xual desire and behavior.

Estradiol supports:

• Dopamine signaling (s*xual motivation)
• Nitric oxide pathways (erectile signaling)

This is why men with low estradiol often report:

• Loss of s*xual thoughts
• Decreased libido
• Reduced drive

Now let’s look at the body.

Estradiol also plays a direct role in the p***s.

It helps regulate:

• Blood vessel function
• Nitric oxide production
• Smooth muscle relaxation

It also has anti-fibrotic effects, helping preserve the elasticity of erectile tissue.

When estradiol is too low:

• Blood flow is impaired
• Nitric oxide signaling decreases
• Tissue becomes less flexible
• Erections weaken

This leads to an important clinical principle:

It’s not just about testosterone levels.
It’s about the balance between testosterone and estradiol.

Men with low estradiol may have “normal” testosterone levels on paper but still experience:

• Low libido
• Erectile dysfunction
• Reduced s*xual interest

This is often seen in men who are placed on aromatase inhibitors unnecessarily, which suppress estradiol production.

On the other hand, excessively high estradiol can also create imbalance.

The goal is physiologic balance not suppression.

In practical terms:

Estradiol is not optional in male s*xual function.

It is a required co-signal.

Testosterone provides the substrate.

Estradiol activates the system.

So when evaluating low libido or erectile dysfunction even with normal testosterone estradiol should always be part of the conversation.

03/23/2026

Many people assume that eating fat is what raises triglycerides.

But in many cases, the more powerful driver is actually excess carbohydrate and sugar intake.

Here’s why.

When you eat carbohydrates, they are broken down into glucose and absorbed into the bloodstream.

If your body needs that energy immediately, it gets used by muscles and other tissues.

But when carbohydrate intake exceeds your energy needs, the liver has to do something with the excess.

It converts it into fat.

This process is called de novo lipogenesis, which literally means “new fat creation.”

During this process:

• Excess glucose is converted into fatty acids
• Those fatty acids are assembled into triglycerides
• Triglycerides are packaged into VLDL particles
• VLDL is released into the bloodstream

The result: triglyceride levels rise.

Fructose, especially from sugary drinks and processed foods, is particularly potent because it is metabolized almost entirely in the liver and strongly stimulates this fat-producing pathway.

That’s why diets high in:

🥤 Sugary beverages
🍩 Refined carbohydrates
🍪 Ultra-processed foods

are strongly associated with:

• Elevated triglycerides
• Fatty liver disease
• Metabolic dysfunction

Dietary fat behaves differently.

Fat is absorbed through the intestine and transported through the lymphatic system, where it is gradually used or stored.

While extremely high fat intake can influence lipid levels, in most metabolic conditions it is excess refined carbohydrates that drive persistent triglyceride elevation.

This is why many patients see dramatic improvements in triglycerides when they reduce:

✔ Sugar
✔ Refined carbohydrates
✔ Ultra-processed foods

In simple terms:

Triglycerides are often a reflection of how your liver is processing excess energy.

When triglycerides are elevated, it’s usually a sign that carbohydrate metabolism and insulin signaling are out of balance.

Address

72 Sharp Street, Unit A-10
Hingham, MA
02043

Opening Hours

Monday 7am - 3pm
Tuesday 7am - 3pm
Wednesday 7am - 3pm
Thursday 7am - 3pm
Friday 7am - 3pm

Telephone

+17813376737

Website

Alerts

Be the first to know and let us send you an email when Dr. Gluck’s Wellness Center posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Shortcuts

Share

Category