Dr Miruna Muha Endocrinolog

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A high TSH is one of the most common findings that can lead to a levothyroxine prescription. In many cases that prescrip...
13/08/2026

A high TSH is one of the most common findings that can lead to a levothyroxine prescription. In many cases that prescription is appropriate and genuinely helpful.

But TSH is a pituitary signal, not a direct measurement of thyroid hormone. It tells you the brain is demanding more thyroid hormone. It does not tell you why the demand increased in the first place.

One of the first questions is whether thyroid autoimmunity is present. Hashimoto’s thyroiditis is the most common cause of hypothyroidism in iodine-sufficient populations. Iodine status, medications, recent illness and other physiological factors can also affect thyroid function and TSH levels.

A complete thyroid assessment starts with TSH and free T4, with thyroid antibodies when autoimmune thyroid disease is suspected. Additional testing is guided by the clinical context: symptoms, medical history, medications, metabolic health and nutritional factors that may influence thyroid function.

A mildly elevated TSH with normal free T4 does not automatically require immediate treatment in every non-pregnant patient. Depending on the degree and persistence of TSH elevation, symptoms, antibody status, age, cardiovascular risk and clinical context, monitoring and repeat testing may be appropriate.

The same TSH in a patient with significant symptoms, positive antibodies or low free T4 is a different clinical picture requiring a different response.

Same number. Different biology. Different answer.

If you have been prescribed thyroid medication based on TSH alone and still feel unwell, the question worth asking is whether the full picture has been assessed.

Book your telemedicine consultation at endoage.eu

📎 References:
Biondi B., NEJM, 2019
Duntas LH., Thyroid, 2010

She came in thinking she was entering menopause. Three doctors had already confirmed it. Hormone therapy was the next st...
11/08/2026

She came in thinking she was entering menopause. Three doctors had already confirmed it. Hormone therapy was the next step.

But the clinical picture was wider than the diagnosis.

Insomnia, hot flashes, brain fog and anxiety are consistent with perimenopause. New food sensitivities developing over months, progressive gut reactivity and a nervous system that had become hypersensitive to everything are not explained by fluctuating estrogen alone.

When we looked beyond the hormonal panel, we found immune dysregulation, intestinal barrier dysfunction, chronic low-grade inflammation and metabolic dysfunction that had been building quietly for years. Perimenopause had not created these problems. It had exposed them, by pushing a biological system that was already under pressure past its compensatory threshold.

The pattern pointed toward Mast Cell Activation Syndrome operating alongside the hormonal transition. A diagnosis that is frequently missed in perimenopausal women precisely because its symptoms overlap almost entirely with hormonal symptoms, and because most clinical encounters are not designed to ask why the picture is wider than expected.

When treatment shifted to address the underlying biological systems rather than hormones alone, symptoms that had been attributed entirely to menopause became significantly more manageable.

Perimenopause was not the root cause. It was the moment when underlying dysfunction became clinically visible.

That distinction changes everything about how a patient is treated.

Book your telemedicine consultation at endoage.eu

Traditional endocrinology is built on thresholds. A value crosses a line, a diagnosis is made, a replacement is initiate...
09/08/2026

Traditional endocrinology is built on thresholds. A value crosses a line, a diagnosis is made, a replacement is initiated. It works well for overt disease. It struggles with everything that precedes it.

The biological reality runs deeper. Insulin resistance changes free hormone availability without altering total levels. Cortisol impairs thyroid conversion in a patient whose TSH appears normal. Visceral fat acts as an endocrine organ, producing hormones and inflammatory signals that disrupt the axis it sits inside.

Circadian biology adds what standard endocrinology consistently undervalues: hormones are not static levels, they are timed signals. Sleep disruption dysregulates the entire axis upstream of any measurement.

Reference ranges define statistical normality. They were never designed to define optimal function. A patient at the bottom of a normal range and one at the top are both "normal." Their decade ahead looks different.

The phenotype — fatigue, cognitive shift, poor recovery, body composition changes — precedes the diagnosis by years. Waiting for the threshold is waiting for the biology to fail completely before acting.

This is the model I left. And what EndoAge is built on instead.

Book your telemedicine consultation at http://endoage.eu

"Your results are normal" is one of the most common things patients hear before they find their way to me.A B12 of 300. ...
07/08/2026

"Your results are normal" is one of the most common things patients hear before they find their way to me.

A B12 of 300. A ferritin of 22. A homocysteine of 11. A free T3 at the bottom of range. Every value reportable as within normal limits. Every value insufficient to explain why this person cannot get through the day without feeling exhausted, foggy and unlike themselves.

Reference ranges define the central distribution of a tested population. They were not designed to define what your body needs to function well. Those are two different standards, and the gap between them is where most unexplained symptoms live.

What I look for is not a single abnormal value. It is the pattern across values that each sit quietly at the lower end of normal, none of them dramatic enough to trigger concern individually, all of them telling a coherent clinical story when read together.

Optimal is not a fixed threshold. It is specific to your biology, your symptoms, your hormonal status and your age. Reaching it requires a different kind of clinical conversation than the one most patients have been offered.

If you have been sent home with normal results while still feeling profoundly unwell, that experience is clinically valid. And it is addressable.

Book your telemedicine consultation at endoage.eu

There is a version of healthcare that waits for something to go wrong before it acts. It is extraordinarily good at mana...
05/08/2026

There is a version of healthcare that waits for something to go wrong before it acts. It is extraordinarily good at managing established disease. It was designed for that purpose.

There is another version that asks a different question entirely: what is already shifting in this person's biology, years before a diagnosis would appear on a standard panel, and what can be done about it now when intervention is least invasive and most effective?

The difference is not just clinical philosophy. It is measurable in outcomes. Insulin resistance is detectable a decade before a diabetes diagnosis. Coronary artery calcium accumulates silently before the first cardiac event. Hormonal transitions reshape metabolism, cognition and cardiovascular risk years before they appear in a standard check-up.

Precision medicine means building a clinical picture from the right markers, in the right context, tracked across time, and making decisions together with a patient who understands their own biology rather than receiving a protocol handed down from authority.

Reference ranges tell you whether you are an outlier in a tested population. They do not tell you whether you are optimal for your specific biology, your hormonal status, your risk profile or your decade of life.

That question requires a different kind of clinical relationship. It is the one we are building at EndoAge, and it is available from anywhere through telemedicine.

Book your consultation at
ENDOAGE | Functional & Longevity Medicine with Dr. Miruna Muha

Over the past few years, my work has gradually expanded from endocrinology into longevity medicine. 🫶Being invited to co...
04/08/2026

Over the past few years, my work has gradually expanded from endocrinology into longevity medicine. 🫶

Being invited to contribute to this conversation at one of the world’s leading congresses in the field is both an honor and a responsibility.❤️

See you in Dubai!

The longevity industry has a sequencing problem. Most people reach for the advanced layer first: peptides, continuous gl...
30/07/2026

The longevity industry has a sequencing problem. Most people reach for the advanced layer first: peptides, continuous glucose monitors, HRV devices, advanced testing. And then wonder why the results are modest.

The research is consistent on this point. Advanced interventions placed on an unstable foundation return marginal outcomes. The foundation is where biological change actually happens.

Three systems define how well the body ages after 35: skeletal muscle, metabolic health and nervous system recovery. Each has three layers: foundation, base and advanced. The foundation of all three overlaps significantly. Sleep. Stable blood glucose. Low inflammatory load. Adequate protein. Consistent movement.

When those inputs are solid, the base layer, strength training, Zone 2 cardio, quarterly metabolic labs, recovery practices, produces measurable results. When the base is established, the advanced layer, body composition scanning, HRV monitoring, targeted peptides, CGM, amplifies what is already working.

The tools at the advanced level are real. Creatine has decades of muscle research behind it. ApoB and hs-CRP catch metabolic risk years before standard panels do. HRV is among the most sensitive daily markers of nervous system recovery available.

But they work inside a structure. Longevity is not a shortcut. It is a sequence.

📎 References: Morton RW., British Journal of Sports Medicine, 2018 Cruz-Jentoft AJ., Age and Ageing, 2019 Pontzer H., Science, 2021 ESC Guidelines on Dyslipidaemias, 2021 Walker M., Why We Sleep, 2017

For years, ovarian aging has been measured by one number: egg count. AMH levels. Antral follicle count. How many are lef...
28/07/2026

For years, ovarian aging has been measured by one number: egg count. AMH levels. Antral follicle count. How many are left.

But researchers are now asking a different question. How much energy can those eggs actually produce?

A mature human egg contains up to 600,000 copies of mitochondrial DNA and one of the highest mitochondrial concentrations in the entire body. The reason is energetic. Every stage of reproduction requires enormous ATP output. Chromosome segregation. Fertilization. Early embryo development. Without sufficient cellular energy, egg quality declines even when egg count remains normal.

This is why a woman can have a completely regular cycle, a normal AMH, and still face fertility challenges. The energy crisis inside the follicle precedes every measurable sign of decline.

Mitochondrial DNA is uniquely vulnerable because it sits directly beside the electron transport chain, the body's largest free radical source, with no protective histones and a mutation rate up to 20 times higher than nuclear DNA. Damage accumulates quietly. Efficiency falls. The downstream effects on egg quality follow.

The next frontier in reproductive medicine is not counting eggs. It is measuring ovarian energy production, and finding ways to support it before the decline becomes irreversible.

📎 References: Cozzolino M., JARG, 2019 Bentov Y., Reprod Biomed Online, 2013 Wallace DC., Nature Reviews Genetics, 2010 Ben-Meir A., Nature Medicine, 2015 Rojas JC., Neurotherapeutics, 2012

A 2026 study published in NeuroImage analyzed brain scans from 459 women aged 65 to 80 and mapped their lifetime hormona...
23/07/2026

A 2026 study published in NeuroImage analyzed brain scans from 459 women aged 65 to 80 and mapped their lifetime hormonal history against measurable brain structure. The findings add significant weight to a conversation medicine has been too slow to have.

Women who used hormonal birth control showed greater gray matter volume in memory and cognitive processing regions, with the effect measurable decades after use ended. Women who used both birth control and menopausal hormone therapy showed larger volumes and thicker cortex specifically in the parietal and temporal regions, the same areas Alzheimer's disease targets first. Women who reached menopause later, meaning more years of endogenous estrogen production, showed thicker posterior cortical tissue in those same key regions.

This is a cross-sectional study using self-reported hormone history. Causation is not established. But it is among the first studies to examine both early and midlife hormone exposure simultaneously using whole-brain imaging in a large sample, and the pattern across all three hormonal variables points in the same direction.

Women represent nearly two thirds of Alzheimer's patients. Research has focused predominantly on menopause. This study suggests the relevant window begins much earlier, and that hormonal decisions across a lifetime carry neurological consequences that become visible on a brain scan decades later.

Hormonal health and brain health are not separate clinical conversations.

At EndoAge, you can explore your hormonal status and cognitive longevity risk through a specialist telemedicine consultation, from anywhere.

📎 Reference:
Honea RA, Watts A, et al. NeuroImage, 2026. DOI: 10.1016/j.neuroimage.2026.121974

The hormonal landscape after 40 shifts across five systems simultaneously, and most standard check-ups measure only a fr...
22/07/2026

The hormonal landscape after 40 shifts across five systems simultaneously, and most standard check-ups measure only a fraction of them.

Progesterone often declines first, disrupting sleep and stress regulation years before perimenopause is on anyone's radar. Estrogen follows with variability rather than a clean drop, affecting vascular health, bone density and cognitive clarity in parallel. Testosterone erodes slowly over decades, quietly changing muscle synthesis, motivation and metabolic rate. DHEA, the most abundant steroid hormone in the body and a precursor to both estrogen and testosterone, declines at roughly 2% per year from its peak at 25 and is almost never included in a standard panel. IGF-1 reflects how efficiently the body is rebuilding and repairing tissue overnight.

What makes this clinically significant is the interaction between these systems. Falling progesterone disrupts sleep, which affects cortisol, which accelerates metabolic dysfunction. Declining estrogen reduces mitochondrial efficiency. Low testosterone impairs the muscle mass that protects metabolic health long term.

A complete hormonal picture requires measuring all of them together, alongside thyroid function, ferritin, vitamin D, glucose and inflammatory markers, because aging is a systemic process and a partial panel produces a partial answer.

📎 References: Brinton RD., Nature Reviews Endocrinology, 2008 Baulieu EE., PNAS, 2000 Labrie F., Journal of Steroid Biochemistry, 2010 Davis SR., Lancet Diabetes Endocrinology, 2015 Laron Z., Nature Clinical Practice Endocrinology, 2008

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