Thyroid Conditions: Naturopathic Support for Hypothyroidism, Hashimoto’s, Graves’ Disease and Hyperthyroidism

Understanding hypothyroidism, hyperthyroidism, Hashimoto’s and Graves’ disease

Not all thyroid conditions are the same. One of the most important distinctions is that hypothyroidism and hyperthyroidism describe how your thyroid is functioning, while Hashimoto’s and Graves’ disease are autoimmune conditions that can cause thyroid dysfunction.

Hypothyroidism (underactive thyroid)

Hypothyroidism occurs when your body doesn’t have enough thyroid hormone available to meet its needs. Because thyroid hormones help regulate metabolism and energy production throughout the body, symptoms can be widespread and often develop gradually.

Common symptoms include fatigue, unexplained weight gain, constipation, feeling cold, brain fog, low mood, dry skin, hair thinning and heavier or more irregular periods.

Hashimoto’s thyroiditis is the most common cause of hypothyroidism, but an underactive thyroid can have other causes, including thyroid surgery, radioactive iodine treatment, certain medications and iodine deficiency or excess.

Hashimoto’s thyroiditis

Hashimoto’s is an autoimmune thyroid disease. Rather than simply having an underactive thyroid, the immune system mistakenly targets the thyroid gland, causing inflammation and gradually affecting its ability to produce thyroid hormones.

This distinction matters because hypothyroidism describes what the thyroid is doing, while Hashimoto’s describes one reason its function may have changed.

Importantly, thyroid autoimmunity can be present before thyroid hormone levels become clearly abnormal. This is one reason testing thyroid antibodies can provide useful information when Hashimoto’s is suspected, even when other thyroid markers remain within range.

Hyperthyroidism (overactive thyroid)

Hyperthyroidism occurs when there is too much thyroid hormone activity, causing many of the body’s metabolic processes to speed up.

Common symptoms include unexplained weight loss, heart palpitations, anxiety, tremor, heat intolerance, sweating, frequent bowel movements, muscle weakness and difficulty sleeping.

There are several possible causes of hyperthyroidism, but the most common is Graves’ disease.

Graves’ disease

Graves’ disease is also an autoimmune thyroid condition, but it affects the thyroid differently from Hashimoto’s. In Graves’ disease, antibodies stimulate the TSH receptor, effectively telling the thyroid to keep producing thyroid hormones even when the body doesn’t need more.

Some people with Graves’ disease also develop thyroid eye disease, which can cause dryness, irritation, pressure, light sensitivity or bulging of the eyes.

Like Hashimoto’s, Graves’ isn’t simply a problem with thyroid hormone levels. The immune system is driving the condition, which is why understanding the autoimmune component matters alongside managing thyroid hormone levels.

Subclinical thyroid dysfunction

Thyroid dysfunction doesn’t always begin with dramatically abnormal results.

In subclinical hypothyroidism, TSH is elevated while Free T4 remains within the laboratory reference range. In subclinical hyperthyroidism, TSH is low while thyroid hormone levels remain within range.

Some people experience symptoms at this stage while others don’t. Whether treatment is appropriate depends on the degree and persistence of the abnormality, symptoms, age and factors such as pregnancy, fertility, cardiovascular health and bone health.

This is one reason thyroid results need to be interpreted in context rather than looking at a single number in isolation.

Why thyroid problems can be missed on standard thyroid testing

If you’ve been told your thyroid tests are “normal” but you’re still experiencing symptoms, it can be difficult to know what to make of your results.

Part of the challenge is understanding what was actually tested.

In Australia and the United States, initial thyroid testing commonly starts with TSH (thyroid-stimulating hormone). Importantly, TSH isn’t actually a thyroid hormone. It’s produced by the pituitary gland in the brain and acts as a signal telling your thyroid how much hormone to produce.

TSH is an important first-line marker, but depending on how testing is ordered, the actual thyroid hormones – T4 and T3 – may not be measured if TSH falls within the laboratory reference range.

This means that when someone tells me, “My thyroid was tested and it was normal”, sometimes what was actually tested was TSH alone.

Depending on your symptoms, results and medical history, further investigation may include Free T4, Free T3 and thyroid antibodies such as thyroid peroxidase antibodies (TPOAb), thyroglobulin antibodies (TgAb) or TSH receptor antibodies (TRAb).

There is also more nuance to the word “normal” than simply being inside or outside a laboratory reference range.

Reference ranges are population-based statistical ranges. They’re extremely useful, but they don’t necessarily tell us what is normal for you as an individual. Research suggests that each person’s thyroid hormone levels tend to remain within a relatively narrow individual range, while laboratory reference ranges need to accommodate the much wider variation that exists between different people.

This is why I pay attention not only to whether a result has been flagged abnormal, but where it sits within the range, how TSH, Free T4 and Free T3 relate to one another, your symptoms and whether your own results have changed over time.

Historical results can be particularly useful. A gradual change in TSH or thyroid hormone levels may provide important context that isn’t obvious from a single test. Family history matters too, particularly if close relatives have Hashimoto’s, Graves’ disease or other thyroid conditions.

Thyroid antibodies add another layer. In Hashimoto’s, antibodies may be detectable before overt hypothyroidism develops, while in Graves’ disease specific antibodies can help identify an autoimmune cause of hyperthyroidism.

The goal isn’t to chase a particular “perfect” thyroid number or assume that every symptom must be coming from the thyroid. It’s to understand what your results mean in the context of your symptoms, family and medical history, and how your individual pattern has changed over time.

Why T4 to T3 conversion matters for thyroid function

Sometimes it’s not just how much thyroid hormone your thyroid produces that matters, but what your body is able to do with it.

Your thyroid produces mostly T4, which then needs to be converted into T3 – the more active form of thyroid hormone your cells can use. Much of this conversion happens outside the thyroid, including in the liver and kidneys.

This is important because conversion can be influenced by what’s happening elsewhere in your body. Illness, inflammation, under-eating or significant calorie restriction and other forms of physiological stress can all affect the way thyroid hormones are converted and used.

Nutrient deficiencies can also play a role. Selenium is particularly important for converting T4 into T3, while iron, iodine and zinc are needed for healthy thyroid hormone production and function.

Hormones can influence the picture too. Oestrogen, particularly oral oestrogen medications, can increase a protein called thyroid-binding globulin (TBG), which binds thyroid hormones in the bloodstream and can change how much is available to the body. This isn’t the same as blocking T4-to-T3 conversion, but it can influence thyroid hormone availability and medication requirements in some women.

This doesn’t mean that every lower T3 result represents a “conversion problem”. Sometimes it’s part of the body’s response to illness, under-eating or other physiological stress.

This is why I look beyond the thyroid itself and consider nutrition, hormones, inflammation, medications and overall health when interpreting your thyroid picture.

Understanding autoimmunity in Hashimoto’s and Graves’ disease

If you have Hashimoto’s or Graves’ disease, there is another important part of the thyroid picture to understand: the immune system.

While Hashimoto’s and Graves’ affect the thyroid differently, both involve a loss of normal immune tolerance. In Hashimoto’s, the immune system gradually damages thyroid tissue, while in Graves’ disease antibodies stimulate the thyroid and drive excess hormone production.

The more useful question is often why that autoimmune process developed in the first place.

There usually isn’t one single cause. Genetics play an important role, which is why autoimmune thyroid disease often runs in families, but environmental and physiological factors can influence whether that susceptibility develops into disease.

These can include infections, smoking, changes in iodine exposure, pregnancy and the postpartum period, certain medications and other immune or environmental influences. Having one autoimmune condition can also increase the likelihood of developing another.

This is why, when autoimmunity is involved, I don’t look only at thyroid hormone levels. I also consider family history, immune health, nutrient status, inflammation and other factors that may be contributing to the individual picture.

The aim isn’t simply to lower thyroid antibodies or find one supposed “root cause”. It’s to understand the wider pattern while making sure the thyroid condition itself is appropriately monitored and medically managed.

The role of nutrients in thyroid health

Your thyroid relies on several nutrients to make, convert and use thyroid hormones, which is why nutrient status can be an important part of the thyroid picture.

Iodine is needed to make T4 and T3, while selenium helps convert T4 into T3 and also supports antioxidant systems that protect thyroid tissue. Iron and zinc are also involved in normal thyroid hormone production and function.

Deficiencies can therefore contribute to thyroid-related symptoms or make existing thyroid dysfunction more difficult to manage. Iron is particularly relevant for women because heavy periods, pregnancy, restrictive diets and other factors can increase the risk of low iron stores.

But with thyroid health, more isn’t necessarily better.

Excess iodine can actually trigger or worsen thyroid dysfunction in susceptible people, particularly those with Hashimoto’s or Graves’ disease. Selenium also has a relatively narrow safe range, which is why I don’t recommend taking high-dose thyroid supplements simply because they contain nutrients marketed as being “good for the thyroid”.

This is also why I prefer to look at diet, symptoms, medical history, medications and relevant pathology before deciding whether supplementation is appropriate.

Supporting thyroid health isn’t about giving everyone iodine, selenium or a generic “thyroid support” formula. It’s about identifying what you actually need – and just as importantly, what you don’t.

The connection between stress, cortisol and thyroid function

Have you ever noticed that your thyroid symptoms seem harder to manage during periods of prolonged stress, illness, poor sleep or physical exhaustion?

The thyroid and stress-response systems don’t operate independently. The HPA axis, which regulates cortisol and helps the body adapt to physical and emotional demands, interacts with the pathways controlling thyroid hormone production and activity.

During periods of significant physiological stress, the body can alter the way thyroid hormones are produced, converted and used. This is particularly noticeable during illness, when T3 levels can fall as part of the body’s adaptive response. Prolonged under-eating, overtraining, chronic illness and other significant physical stressors can also influence thyroid hormone patterns.

Cortisol is part of this relationship, but it’s not as simple as “high cortisol causes hypothyroidism” or “adrenal fatigue causes thyroid disease”. The HPA and thyroid axes communicate with one another, and changes in one system can occur alongside changes in the other.

There can also be considerable overlap in how these problems feel. Fatigue, brain fog, poor exercise tolerance, sleep disturbance, low mood and difficulty coping with stress can occur with both thyroid dysfunction and HPA-axis-related symptoms.

This is why it’s important to distinguish what is actually coming from the thyroid and what may be part of a broader stress-response picture. Treating every symptom as a thyroid problem can be just as unhelpful as overlooking the thyroid altogether.

The connection between thyroid function and women’s hormones

Thyroid and reproductive hormones are closely connected, which is one reason thyroid problems can sometimes show up through changes in your menstrual cycle rather than symptoms you immediately associate with your thyroid.

Both hypothyroidism and hyperthyroidism can affect menstrual regularity and ovulation. Some women notice heavier or more irregular periods, changes in cycle length or difficulty conceiving before realising their thyroid may be contributing.

There is also a relationship between thyroid function and prolactin. In hypothyroidism, changes in the hormonal signalling between the brain and thyroid can sometimes increase prolactin, which may further interfere with ovulation, menstrual cycles and fertility.

The relationship also works in the other direction. Changes in oestrogen can influence the proteins that carry thyroid hormones through the bloodstream, which is particularly relevant during pregnancy and when using oral oestrogen medications.

Perimenopause can make the picture even more confusing. Fatigue, weight changes, brain fog, mood changes, disrupted sleep, hair changes and altered periods can occur with both thyroid dysfunction and changing reproductive hormones.

This overlap is why I don’t automatically assume that every new symptom in your forties is “just perimenopause” – or that every symptom in someone with a thyroid condition is coming from their thyroid. Understanding which systems are contributing is important for choosing the right approach.

Thyroid health, fertility, pregnancy and postpartum

If you’re trying to conceive, undergoing IVF, pregnant or have recently had a baby, thyroid health becomes particularly important.

Thyroid hormones play an important role in reproductive function and the early development of pregnancy. Both hypothyroidism and hyperthyroidism can affect fertility, while poorly controlled thyroid dysfunction can increase the risk of pregnancy complications.

Hashimoto’s also deserves consideration because thyroid autoimmunity is more common in women experiencing fertility difficulties, and thyroid antibodies have been associated with increased miscarriage and some adverse pregnancy outcomes. Having thyroid antibodies doesn’t mean you won’t conceive or have a healthy pregnancy, but it can be an important part of the clinical picture.

Pregnancy places greater demands on the thyroid, and thyroid hormone requirements can change very early, particularly if you’re already taking thyroid medication. This is why thyroid targets and monitoring can be different when you’re trying to conceive or pregnant.

The postpartum period brings another significant shift. Changes in immune function after pregnancy can trigger postpartum thyroiditis, which may cause a temporary hyperthyroid phase followed by hypothyroidism. Symptoms can easily be mistaken for the exhaustion, anxiety, mood changes or weight changes that can accompany life with a new baby.

For some women thyroid function returns to normal, while others develop persistent hypothyroidism. This is why I like thyroid health to be considered across the entire reproductive journey – from preconception and IVF through pregnancy and postpartum – particularly when there is known thyroid disease, thyroid autoimmunity or a family history of thyroid conditions.

The connection between thyroid function and digestive health

If constipation has become one of your most persistent symptoms, your thyroid may be part of the reason.

Thyroid hormones help regulate movement through the digestive tract. When thyroid function is low, gut motility can slow down, contributing to constipation, bloating, feeling unusually full after eating or simply feeling as though your digestion has become increasingly sluggish.

Hyperthyroidism can create the opposite pattern. When thyroid hormone activity is too high, gut motility can increase, contributing to more frequent bowel movements or diarrhoea.

But the relationship between the gut and thyroid can also work in the other direction.

This is particularly relevant in autoimmune thyroid conditions. The gastrointestinal tract plays an important role in immune regulation, and research has found associations between Hashimoto’s, changes in the gut microbiome and increased intestinal permeability. Coeliac disease is also more common in people with autoimmune thyroid disease, which is one reason persistent digestive symptoms shouldn’t automatically be dismissed as IBS.

Gut infections may be another piece of this picture. Emerging research has explored a possible association between Hashimoto’s and the intestinal organism Blastocystis. Small studies have reported changes in thyroid antibodies and inflammatory markers following eradication, although this doesn’t establish that Blastocystis causes Hashimoto’s. It does, however, add to growing interest in how intestinal infections, the gut microbiome and immune regulation may interact in susceptible people.

Digestive health can also influence nutrient and medication absorption. This can be particularly important if you’re taking thyroid medication or struggling with deficiencies in nutrients needed for healthy thyroid function.

This is why I don’t automatically separate persistent digestive symptoms from the thyroid picture. Sometimes they’re another clue to what may be happening more broadly in the body.

Could environmental exposures be affecting your thyroid?

Sometimes someone is doing everything she has been told to do for her thyroid. She’s taking her medication, addressing nutrient deficiencies and looking after her health – yet there are still pieces of the picture that don’t quite make sense.

That’s when I start asking different questions.

What does your drinking water look like? How much fish do you eat? Have you had significant dental, occupational or environmental exposures? Is there anything in your history that could be adding another layer to the thyroid picture?

The reason I ask is that the thyroid can be particularly sensitive to certain environmental exposures. Producing and using thyroid hormones depends on tightly regulated iodine uptake, hormone production, transport and signalling, and some environmental substances can interfere with these processes.

Fluoride is one example that has been studied in relation to thyroid function. Research suggests higher levels of fluoride exposure may influence TSH and thyroid function, although this doesn’t mean fluoride is responsible for thyroid disease in every individual.

Mercury is another exposure I consider when the history points in that direction, particularly with frequent consumption of higher-mercury fish, occupational exposure or significant past dental amalgam exposure. Mercury has been associated with changes in thyroid hormone patterns and thyroid autoimmunity, but again, the presence of thyroid disease doesn’t automatically mean mercury is part of the problem.

There is also growing research into endocrine-disrupting chemicals such as PFAS, bisphenols and phthalates and the ways they may interfere with thyroid hormone pathways.

For me, this isn’t about assuming that everyone with Hashimoto’s or hypothyroidism has a hidden toxin problem.

It’s about looking at the history.

If there is a meaningful exposure, it becomes another clue worth considering. If there isn’t, there is little value in chasing every possible environmental chemical simply because you have a thyroid condition.

The question is always the same: which pieces of the picture actually matter for you?

Thyroid medication: thyroxine, T3 and thyroid extract

Thyroid medication can be an important – and sometimes essential – part of managing hypothyroidism. For many people it works extremely well, while others continue to experience symptoms despite their thyroid results improving.

The most commonly prescribed medication is levothyroxine, also known as thyroxine or T4. It replaces the T4 your thyroid is no longer producing adequately, which your body then converts into the more active T3 hormone.

But T4 isn’t the only treatment option.

T3 is also available as a medication called liothyronine and may sometimes be prescribed alongside T4. Another option is desiccated thyroid extract, such as Armour Thyroid in the United States or compounded thyroid extract in Australia.

The main difference is that thyroxine provides T4 alone, while thyroid extract provides both T4 and T3. This means thyroid extract provides some active T3 directly rather than relying entirely on your body to convert T4 into T3.

Because desiccated thyroid extract is made from animal thyroid gland tissue, it also contains other naturally occurring thyroid components that aren’t present in synthetic T4 medication, including small amounts of calcitonin and other iodothyronines such as T1 and T2. Some patients report feeling better on thyroid extract, and studies have found that a proportion of patients prefer it to levothyroxine. However, we don’t yet have good evidence showing that these additional components are responsible for the difference. The presence of T3 itself may be important for some people.

This doesn’t mean that thyroid extract or T3-containing medication is better for everyone. Thyroid medication needs to be individually prescribed and carefully monitored, as too much thyroid hormone can contribute to palpitations, anxiety, tremor and insomnia and, over time, increase cardiovascular and bone risks.

There is also an important distinction if you have Hashimoto’s. Thyroid medication replaces hormones your thyroid is no longer producing adequately, but it doesn’t directly treat the autoimmune process. This is why medication and broader thyroid support aren’t necessarily an either/or decision.

Conditions that can occur alongside thyroid disease

Sometimes thyroid disease isn’t occurring in isolation, and this is particularly relevant when autoimmunity is involved.

Hashimoto’s and Graves’ disease are associated with an increased likelihood of other autoimmune conditions, including coeliac disease, type 1 diabetes, pernicious anaemia, rheumatoid arthritis, inflammatory bowel disease, vitiligo and Addison’s disease. This doesn’t mean that having autoimmune thyroid disease means you’ll develop another autoimmune condition, but unexplained symptoms shouldn’t automatically be attributed to your thyroid.

There are also important overlaps with women’s health. Research has found associations between thyroid disease and both endometriosis and PCOS, with autoimmune thyroid disease occurring more frequently in some women with either condition. Endometriosis isn’t currently classified as an autoimmune disease, and PCOS and thyroid disease are separate endocrine conditions, but they can coexist.

This becomes particularly important because many of the symptoms overlap. Fatigue, unexplained weight changes, irregular or changing periods, fertility difficulties, mood changes and metabolic symptoms can potentially have more than one driver.

When thyroid symptoms need medical investigation

Not every thyroid symptom should be managed by watching and waiting.

A new lump or swelling in your neck, difficulty swallowing or breathing, significant or persistent heart palpitations, an irregular heartbeat, marked unexplained weight loss or new eye symptoms – particularly bulging, swelling, pain or visual changes – should be medically assessed.

Hyperthyroidism and Graves’ disease are particularly important to diagnose and appropriately treat because persistently high thyroid hormone levels can affect the heart and bones.

Naturopathic support can work alongside medical treatment, but it shouldn’t replace appropriate investigation or treatment of significant thyroid disease.

What to consider before having your thyroid removed

For some thyroid conditions, surgery can be the right and sometimes necessary treatment. This may include thyroid cancer or suspicious nodules, a large thyroid causing pressure or difficulty swallowing, and some cases of Graves’ disease that are difficult to control with medication.

But removing the thyroid is a significant and irreversible decision, and where there are reasonable alternatives, I believe it’s important to understand those options before making it.

After a total thyroidectomy, your body can no longer produce its own thyroid hormones. You will therefore need thyroid hormone replacement for life, with ongoing blood testing and medication adjustments when required.

There are also surgical risks to consider. The parathyroid glands sit alongside the thyroid and help regulate calcium levels, so damage to them can lead to low calcium and, occasionally, permanent hypoparathyroidism. The nerves controlling the vocal cords also run close to the thyroid and can be injured during surgery, although serious permanent complications are uncommon when surgery is performed by an experienced thyroid surgeon.

For Graves’ disease specifically, surgery is one of several treatment options. Depending on your circumstances, alternatives may include antithyroid medication such as carbimazole/methimazole or PTU, or radioactive iodine. Each has different benefits, limitations and long-term consequences.

It’s also important to understand what surgery does and doesn’t do. Removing the thyroid can resolve the overproduction of thyroid hormone in Graves’ disease and thyroid antibodies often decline afterwards. However, removing the gland doesn’t necessarily answer the question of why the thyroid became inflamed, autoimmune or dysfunctional in the first place – or whether other immune, hormonal or environmental factors are still relevant to the broader picture.

Hashimoto’s and Graves’ are immune-mediated diseases, and there may still be value in understanding the factors that accompanied the development of thyroid disease.

This doesn’t mean thyroid surgery should be avoided when it’s genuinely indicated. It means the decision deserves an informed discussion about why surgery is being recommended, what alternatives are available and what life without a thyroid will involve.

When surgery is elective rather than urgent, getting a second opinion from an endocrinologist or experienced thyroid surgeon can also help you feel confident you’ve properly considered your options.