{"id":28843,"date":"2026-02-21T08:16:18","date_gmt":"2026-02-21T13:16:18","guid":{"rendered":"https:\/\/vitacru.com\/?p=28843"},"modified":"2026-08-12T13:14:43","modified_gmt":"2026-08-12T17:14:43","slug":"your-thyroid-more-than-just-a-tsh-question","status":"publish","type":"post","link":"https:\/\/vitacru.com\/en\/sante-globale\/votre-thyroide-bien-plus-quune-question-de-tsh\/","title":{"rendered":"Your thyroid: much more than a TSH issue"},"content":{"rendered":"

This small gland that controls everything<\/strong><\/h4><\/div>\n\n\n\n

It weighs barely 20 grams. It is shaped like a butterfly resting at the base of your neck. And yet, it influences every cell, every tissue, every organ in your body.<\/p>\n\n\n\n

Your thyroid is your metabolic thermostat. It dictates how quickly your cells burn energy, how your body functions in terms of temperature, and the rhythm of your heartbeat. It regulates your weight, digestion, mood, the quality of your skin and hair, your ability to think clearly, and even your fertility.<\/p>\n\n\n\n

When it functions well, everything runs smoothly. You have energy, you digest well, you sleep well, you think clearly.<\/p>\n\n\n\n

When she slows down, it's as if someone is dimming the lights on your whole system. Everything grinds to a halt\u2014and the symptoms are so diffuse, so \u00abordinary,\u00bb that they're attributed to stress, age, or the normal fatigue of modern life.<\/p>\n\n\n\n

Dr. David Brownstein, who has treated thousands of thyroid patients in over 30 years of practice, believes that thyroid problems affect far more people than official statistics suggest. Why? Because conventional tests miss the majority of cases. And that's exactly what we're going to explore together.<\/p>\n\n\n\n

A Bit of History \u2014 The Thyroid Before Modern Medicine<\/strong><\/h3><\/div>\n\n\n\n

Goiter, a visible swelling.<\/p>\n\n\n\n

In the Middle Ages, goiter was endemic in mountainous regions far from the sea\u2014the Alps, the Andes, the Himalayas\u2014where the soil and diet were naturally low in iodine. It was sometimes called \u00abmountain sickness.\u00bb Local healers instinctively prescribed dried seaweed and sea salt, remedies that contained exactly what the thyroid needed.<\/p>\n\n\n\n

It was in 1811 that French chemist Bernard Courtois discovered iodine by burning seaweed. And in 1829, Jean Lugol, another French doctor, developed the famous solution that bears his name\u2014combining elemental iodine and potassium iodide. This solution quickly became a universal remedy, used for everything from thyroid issues to infections.<\/p>\n\n\n\n

Then came the turning point. In the 20th century, medicine turned to synthetic thyroid hormones and blood tests as the dominant approach. Iodine and nutritional approaches were gradually forgotten. And that, according to Dr. Brownstein, is when we started to lose sight of the complete picture.<\/p>\n\n\n\n

How your thyroid works \u2013 a simple explanation<\/strong><\/h3><\/div>\n\n\n\n

Your thyroid doesn't work alone. It's part of a communication chain that starts in the brain.<\/p>\n\n\n\n

Think of it like a home thermostat. The hypothalamus in your brain constantly monitors your thyroid hormone levels. When it detects that the level is dropping, it sends a signal (TRH) to the pituitary gland, a small gland at the base of your brain. The pituitary gland responds by releasing TSH \u2013 the hormone that tells your thyroid, \u00abMake more hormones.\u00bb<\/p>\n\n\n\n

Your thyroid obeys and primarily manufactures T4\u2014a \u00abstorage\u00bb hormone, relatively inactive. The T4 then needs to be converted into T3, the active form that actually enters your cells to switch on metabolism. This conversion essentially happens in the liver, intestines, and peripheral tissues.<\/p>\n\n\n\n

This is a crucial point that conventional medicine tends to overlook: having a normal TSH and even a normal T4 doesn't mean your cells are receiving enough active T3. If your liver is overloaded, if your gut is out of balance, if you're lacking essential nutrients like selenium, zinc, or iodine, the T4 \u2192 T3 conversion can be compromised. You produce the hormone, but your body can't use it.<\/p>\n\n\n\n

It's like having gas in the tank, but a clogged fuel filter. The engine runs, but idles.<\/p>\n\n\n\n

The problem with conventional tests<\/strong><\/h3><\/div>\n\n\n\n

This is probably the most frustrating\u2014and most important\u2014topic when talking about the thyroid.<\/p>\n\n\n\n

Conventional medicine relies almost exclusively on TSH to evaluate the thyroid. If your TSH is in the \u00abnormal range,\u00bb you're told everything is fine. Move along.<\/p>\n\n\n\n

But Dr. Brownstein raises a significant issue: reference ranges are established from the general population, which includes millions of people already suffering from undiagnosed hypothyroidism. Therefore, \u00abnormal\u00bb is skewed downwards. It's like establishing the \u00abnormal temperature\u00bb of a room by measuring houses where half of them have a faulty heating system.<\/p>\n\n\n\n

Furthermore, TSH measures only one thing: what the brain is telling the thyroid to produce. It says nothing about what the thyroid actually produces, nor about what the cells ultimately receive. A normal TSH level can coexist with insufficient free T3, elevated thyroid antibodies, or a blocked T4-to-T3 conversion.<\/p>\n\n\n\n

This is why so many people\u2014especially women\u2014find themselves with all the classic symptoms of hypothyroidism (fatigue, feeling cold, weight gain, constipation, dry skin, hair loss, brain fog, depression) yet a diagnosis of \u00abnormal thyroid.\u00bb.<\/p>\n\n\n\n

The body speaks. The numbers say the opposite. And too often, it's the numbers we believe.<\/p>\n\n\n\n

When the thyroid goes into overdrive or slows down \u2014 the two sides of imbalance<\/strong><\/h3><\/div>\n\n\n\n

The thyroid is often associated solely with hypothyroidism \u2013 the slowdown. But the thyroid can also speed up. And understanding both sides of the coin completely changes the perspective.<\/p>\n\n\n\n

When the thyroid runs slow (hypothyroidism):<\/strong> persistent fatigue, sensitivity to cold, weight gain, constipation, dry skin, brittle hair, loss of the outer third of the eyebrows (a classic sign), brain fog, low mood, heavy or irregular menstrual cycles, high cholesterol with no obvious dietary cause, water retention, puffy face upon waking.<\/p>\n\n\n\n

When the thyroid goes into overdrive (hyperthyroidism):<\/strong> Rapid weight loss despite a good appetite, palpitations, nervousness and agitation, hand tremors, excessive sweating, heat intolerance, insomnia, accelerated bowel movements, light or absent menstrual cycles, paradoxical fatigue despite feeling \u00aboverstimulated.\u00bb.<\/p>\n\n\n\n

Each of these symptoms, taken alone, might seem insignificant. But together, they paint a clear picture.<\/p>\n\n\n\n

And here's what most people don't realize: in both cases, whether TSH is high or low, the underlying signal is often the same\u2014a thyroid desperately seeking a substance it's lacking. Dr. Brownstein emphasizes this point: high TSH doesn't simply mean \u00absluggish thyroid.\u00bb It's the brain shouting louder because the thyroid doesn't have the materials to respond\u2014iodine, first and foremost. And low TSH doesn't always indicate overproduction. It can reflect a breakdown in the entire communication axis.<\/p>\n\n\n\n

Before applying an \u00abhypo\u00bb or \u00abhyper\u00bb label and prescribing a molecule, the naturopathic question is more fundamental: is this gland receiving what it needs to function? Does the body's terrain support it or deplete it?<\/p>\n\n\n\n

The Thyroid and Iodine \u2014 A Vital Connection That Medicine Has Overlooked<\/strong><\/h3><\/div>\n\n\n\n

Impossible to talk about the thyroid without talking about\u2019iodine<\/a>. It is literally the raw material your thyroid uses to produce its hormones. The hormones T4 and T3 are even named after the number of iodine atoms they contain\u2014four for T4, three for T3.<\/p>\n\n\n\n

Dr. Brownstein considers iodine deficiency a silent epidemic. And this deficiency doesn't just affect the thyroid. Every cell in the body has iodine receptors. But the thyroid is the first to suffer when reserves are depleted \u2013 it's the largest consumer.<\/p>\n\n\n\n

The problem is twofold. On the one hand, our diet has become low in iodine\u2014the soil is depleted, and seaweed and wild-caught fish have disappeared from our plates. On the other hand, our environment bombards us with toxic halogens\u2014fluoride in water, bromide in commercial bread and plastics, chlorine in tap water\u2014which actively displace iodine from its cellular receptors.<\/p>\n\n\n\n

So your thyroid is fighting on two fronts: not enough raw material, and constant competition with chemical impostors.<\/p>\n\n\n\n

The solution ofLugol 2 %<\/a>, which combines the two forms of iodine used by the body, remains the tool of choice for restoring levels completely and in a balanced way. But iodine doesn't act alone\u2014it needs its cofactors to be utilized safely and effectively.<\/p>\n\n\n\n

Essential cofactors \u2014 the thyroid never works alone<\/strong><\/h3><\/div>\n\n\n\n

It's a fundamental principle in naturopathy: no nutrient works in isolation. The thyroid needs a complete team to function.<\/p>\n\n\n\n

Selenium<\/a><\/strong> It is essential for the conversion of T4 into active T3. Without selenium, you produce the hormone but your body cannot activate it. Selenium also protects the thyroid from oxidative stress generated by its own hormone production. Brazil nuts are the most concentrated food source \u2013 two to three nuts per day are often sufficient.<\/p>\n\n\n\n

Zinc<\/a><\/strong> also participates in the T4 \u2192 T3 conversion and supports communication between the hypothalamus, pituitary gland, and thyroid. A zinc deficiency can mimic or worsen hypothyroidism even when the thyroid itself is functioning.<\/p>\n\n\n\n

Magnesium<\/a><\/strong> is necessary for the very production of thyroid hormones. Without sufficient magnesium, the thyroid runs at a slow pace even if all other ingredients are present. And let's remember that magnesium is also involved in over 600 biochemical reactions\u2014its importance goes far beyond the thyroid.<\/p>\n\n\n\n

Vitamin D<\/a><\/strong> It directly influences thyroid function and the immune system. Its deficiency is associated with an increased risk of autoimmune thyroiditis (Hashimoto's). And vitamin D itself needs magnesium to be activated \u2014 everything is interconnected.<\/p>\n\n\n\n

Vitamins complex B<\/a><\/strong>, in particular the B12<\/a>, maintain cellular energy and the nervous system. \u00abThyroid\u00bb fatigue is often amplified by a B12 deficiency, especially in people who eat little animal protein.<\/p>\n\n\n\n

And of course, iodine<\/a><\/strong> \u2014 the essential building block. Dr. Brownstein emphasizes that taking iodine supplements without its cofactors, particularly selenium, can cause adverse reactions. It\u2019s the whole picture that matters. It\u2019s always the whole picture.<\/p>\n\n\n\n

Stress, the adrenals, and the thyroid \u2014 the invisible triangle<\/strong><\/h3><\/div>\n\n\n\n

When cortisol remains chronically elevated, it blocks the conversion of T4 into active T3. The body, in survival mode, redirects its energy toward stress management rather than metabolism. As a result, you experience all the symptoms of a sluggish thyroid, even if your thyroid itself is not \u00absick.\u00bb.<\/p>\n\n\n\n

This is a point Dr. Brownstein often emphasizes: you cannot treat the thyroid without addressing the adrenals. Giving thyroid hormones to someone with exhausted adrenals is like whipping a tired horse. It makes things worse.<\/p>\n\n\n\n

Order matters. Support the adrenals first, stabilize cortisol, then nourish the thyroid. That's exactly why adaptogenic formulas like the Licorice<\/a> \u2013 which deeply restores the adrenals \u2013 and the Tisane Adapt<\/a>are supplements so relevant in a thyroid support approach. The thyroid is not treated in isolation. The terrain is being restored.<\/p>\n\n\n\n

The Gut \u2014 The Hidden Pillar of Thyroid Health<\/strong><\/h3><\/div>\n\n\n\n

One might think the thyroid and the gut live in two separate worlds. It's quite the opposite.<\/p>\n\n\n\n

About 20% of the conversion of T4 to active T3 occurs in the intestine, thanks to healthy gut flora. An unbalanced gut \u2014 dysbiosis, intestinal permeability<\/a>, chronic inflammation directly compromises this conversion. You can have a thyroid that produces correctly, but an intestine that cannot activate the hormone.<\/p>\n\n\n\n

In addition, about 70% of the immune system is located in the gut. However, the most common cause of hypothyroidism in developed countries is Hashimoto\u2019s thyroiditis\u2014an autoimmune disease in which the immune system attacks the thyroid. The health of your gut directly influences the risk and progression of this condition.<\/p>\n\n\n\n

Feeding your gut flora with live foods, prebiotic fibers, and fermented foods indirectly but powerfully nourishes your thyroid.<\/p>\n\n\n\n

Support your thyroid naturally<\/strong><\/h3><\/div>\n\n\n\n

Naturopathy does not treat the thyroid as an isolated organ. It restores the body's internal environment so that the thyroid can function as it was designed to.<\/p>\n\n\n\n

Feed with the right foods.<\/strong> Seaweed (kelp, dulse, nori) is the richest dietary source of iodine. Brazil nuts are a good source of selenium. Pumpkin seeds and seafood are good sources of zinc. Dark leafy greens are a good source of magnesium. Fatty fish and eggs for vitamin D and omega-3s. Raw cacao, which combines magnesium and antioxidants. And living foods\u2014raw, enzymatically active\u2014that support the digestion and absorption of all these nutrients.<\/p>\n\n\n\n

Avoid disruptors.<\/strong> Fluoride, bromide, and chlorine displace iodine from its receptors. Filtering your water, choosing bromate-free breads, and reducing plastic exposure are simple actions that protect your thyroid daily. Unfermented soy, in excess, can also interfere with thyroid function. And gluten, in sensitive individuals, can worsen thyroid autoimmunity \u2014 the molecular structure of gliadin resembles that of thyroid tissue, which can perpetuate immune confusion.<\/p>\n\n\n\n

Support the adrenals.<\/strong> Adaptogens \u2014 ashwagandha, rhodiola, licorice, eleuthero, and reishi \u2014 stabilize cortisol and free the thyroid from the pressure of chronic stress. Ashwagandha, in particular, has been studied for directly supporting thyroid function in addition to its adrenal action.<\/p>\n\n\n\n

Supplement wisely.<\/strong> Iodine (Lugol 2 %), along with its cofactors: selenium, zinc, magnesium, B vitamins, vitamin D, and vitamin K2. For those who prefer a gentler approach, the Kelp<\/a> \u2014 a brown seaweed naturally rich in iodine \u2014 offers a whole and progressive food source, ideal for sensitive individuals or for starting gently. Dr. Brownstein recommends a progressive and supervised approach in all cases, especially if the deficiency has been present for a long time. Iodine supplementation can trigger a detoxification of toxic halogens that occupied the receptors \u2013 a beneficial process but one that deserves to be managed.<\/p>\n\n\n\n

Taking care of your gut.<\/strong> Live foods, fermented foods, prebiotic fiber, and reducing inflammatory foods. A healthy gut means a better-nourished thyroid and an immune system that no longer attacks its own tissues.<\/p>\n\n\n\n

The female thyroid \u2014 a particular vulnerability<\/strong><\/h3><\/div>\n\n\n\n

Women are five to eight times more affected than men by thyroid imbalances. This is not a coincidence.<\/p>\n\n\n\n

Thyroid hormones and reproductive hormones are closely linked. Estrogen influences the proteins that transport thyroid hormones in the blood. When present in relative excess\u2014the so-called estrogen dominance described by Dr. John Lee\u2014it increases these transport proteins, which reduces the amount of free thyroid hormones available to cells.<\/p>\n\n\n\n

That's why women in perimenopause<\/a> often develop thyroid symptoms that weren\u2019t there before. Fatigue, feeling cold, weight gain, brain fog \u2014 symptoms that perfectly overlap with those of hypothyroidism and perimenopause. The two are often two sides of the same coin. <\/p>\n\n\n\n

Iodine, let's remember, isn't just for the thyroid. Dr. Brownstein has documented its protective role in breast and ovarian tissues \u2013 it helps the body metabolize estrogen into less active forms. One mineral, multiple systems, one common ground.<\/p>\n\n\n\n

Restoring Thyroid Health<\/strong><\/h3><\/div>\n\n\n\n

Your thyroid is not a capricious organ. It is a remarkably intelligent gland that responds to what you give it \u2014 or what you withhold.<\/p>\n\n\n\n

\"book<\/figure><\/div>\n\n\n\n

The fatigue you've been carrying for years, the chilliness you accept as \u00abnormal,\u00bb the brain fog you attribute to stress, the stubborn extra pounds despite all your efforts \u2013 these may not be inevitable. They might be signals from a thyroid that is simply waiting to be given back its tools: iodine and its cofactors, a functioning gut, resilient adrenals, a nourished terrain rather than a clogged one.<\/p>\n\n\n\n

Naturopathy does not \u00abtreat\u00bb the thyroid like a faulty part to be replaced. It restores the conditions so that this extraordinary gland can do what it has always known how to do \u2013 orchestrate your metabolism, your energy, and your vitality.<\/p>\n\n\n\n

Your thyroid is waiting. It just needs to be heard.<\/p>\n\n\n\n

<\/p>\n\n\n\n

References<\/strong>:<\/em><\/p>\n\n\n\n

    \n
  1. Brownstein, D. (2014). Overcoming Thyroid Disorders. Medical Alternatives Press.<\/em><\/li>\n\n\n\n
  2. Brownstein, D. (2014). Iodine: Why You Need It, Why You Can't Live Without It.<\/a> 5th Edition. Medical Alternatives Press.<\/em><\/li>\n\n\n\n
  3. Sharma, A.K., et al. (2018). Efficacy and safety of ashwagandha root extract in subclinical hypothyroid patients: A double-blind, randomized placebo-controlled trial. *Journal of Alternative and Complementary Medicine*, *24*(3), 243-248.<\/em><\/li>\n\n\n\n
  4. Ventura, M., Melo, M., & Carrilho, F. (2017). Selenium and thyroid disease: From pathophysiology to treatment. International Journal of Endocrinology, 2017, 1297658.<\/em><\/li>\n\n\n\n
  5. Knezevic, J., et al. (2020). Thyroid-gut axis: How does the microbiota influence thyroid function? Nutrients, 12(6), 1769.<\/em><\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"

    Fatigue persistante, frilosit\u00e9, prise de poids inexpliqu\u00e9e, brouillard mental… Et si votre thyro\u00efde essayait de vous parler depuis des ann\u00e9es ? Cette petite glande en forme de papillon contr\u00f4le votre m\u00e9tabolisme, votre \u00e9nergie et votre humeur. D\u00e9couvrez pourquoi les tests conventionnels passent \u00e0 c\u00f4t\u00e9 \u2014 et ce que la naturopathie peut faire pour restaurer votre vitalit\u00e9.<\/p>","protected":false},"author":3,"featured_media":11841,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[9],"tags":[],"class_list":["post-28843","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sante-globale"],"uagb_featured_image_src":{"full":["https:\/\/vitacru.com\/wp-content\/uploads\/2025\/07\/thyro.webp",2048,1463,false],"thumbnail":["https:\/\/vitacru.com\/wp-content\/uploads\/2025\/07\/thyro-150x150.webp",150,150,true],"medium":["https:\/\/vitacru.com\/wp-content\/uploads\/2025\/07\/thyro-400x286.webp",400,286,true],"medium_large":["https:\/\/vitacru.com\/wp-content\/uploads\/2025\/07\/thyro-768x549.webp",768,549,true],"large":["https:\/\/vitacru.com\/wp-content\/uploads\/2025\/07\/thyro-1200x857.webp",800,571,true],"1536x1536":["https:\/\/vitacru.com\/wp-content\/uploads\/2025\/07\/thyro-1536x1097.webp",1536,1097,true],"2048x2048":["https:\/\/vitacru.com\/wp-content\/uploads\/2025\/07\/thyro.webp",2048,1463,false],"trp-custom-language-flag":["https:\/\/vitacru.com\/wp-content\/uploads\/2025\/07\/thyro.webp",18,12,false],"image-blog":["https:\/\/vitacru.com\/wp-content\/uploads\/2025\/07\/thyro-1200x480.webp",1200,480,true],"mailpoet_newsletter_max":["https:\/\/vitacru.com\/wp-content\/uploads\/2025\/07\/thyro.webp",1320,943,false]},"uagb_author_info":{"display_name":"Annie","author_link":"https:\/\/vitacru.com\/en\/author\/a5d161023cee9fe5\/"},"uagb_comment_info":0,"uagb_excerpt":"Fatigue persistante, frilosit\u00e9, prise de poids inexpliqu\u00e9e, brouillard mental... Et si votre thyro\u00efde essayait de vous parler depuis des ann\u00e9es ? Cette petite glande en forme de papillon contr\u00f4le votre m\u00e9tabolisme, votre \u00e9nergie et votre humeur. D\u00e9couvrez pourquoi les tests conventionnels passent \u00e0 c\u00f4t\u00e9 \u2014 et ce que la naturopathie peut faire pour restaurer votre…","_links":{"self":[{"href":"https:\/\/vitacru.com\/en\/wp-json\/wp\/v2\/posts\/28843","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vitacru.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vitacru.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vitacru.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/vitacru.com\/en\/wp-json\/wp\/v2\/comments?post=28843"}],"version-history":[{"count":1,"href":"https:\/\/vitacru.com\/en\/wp-json\/wp\/v2\/posts\/28843\/revisions"}],"predecessor-version":[{"id":33394,"href":"https:\/\/vitacru.com\/en\/wp-json\/wp\/v2\/posts\/28843\/revisions\/33394"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vitacru.com\/en\/wp-json\/wp\/v2\/media\/11841"}],"wp:attachment":[{"href":"https:\/\/vitacru.com\/en\/wp-json\/wp\/v2\/media?parent=28843"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vitacru.com\/en\/wp-json\/wp\/v2\/categories?post=28843"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vitacru.com\/en\/wp-json\/wp\/v2\/tags?post=28843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}