Supporting Thyroid Health Naturally: The Nutrients, Gut and Liver Connections Worth Knowing
Updated: 19 hours ago
What if supporting your thyroid isn’t about finding one perfect supplement — but understanding what your thyroid actually needs to make, convert and use its hormones properly?
Ola’s clinical perspective: " To produce thyroid hormones, convert them into their more active form and allow them to do their job throughout the body, we need to think about nutrient status, digestion and absorption, gut health, liver function, sleep, stress and your individual thyroid condition. That is why, in my practice, I don’t start by giving everyone the same “thyroid supplement” list. I look at the bigger picture: your diagnosis, symptoms, pathology, medication, nutrient intake, digestive health and lifestyle — and then work out what may actually need support." - Ola Krawczyk, Clinical Nutritionist and ATMS member
If you’re living with Hashimoto’s, hypothyroidism or adjusting to life after thyroid surgery, personalised Thyroid Nutrition Support can help you understand which nutrients, dietary factors and digestive issues may be most relevant to your individual needs.
Nutrients I consider when supporting thyroid health
🦋 Selenium — for thyroid hormone conversion and antioxidant protection
Selenium is one of the most important thyroid-related minerals.
It is required by enzymes involved in converting T4 into the more active T3.
It supports glutathione peroxidase, an antioxidant enzyme that helps protect thyroid cells from oxidative damage.
Selenium is also frequently studied in autoimmune thyroid conditions.
But more selenium does not automatically mean better thyroid conversion.
The goal is adequate intake and correcting deficiency where needed — not taking high doses “just in case.”
🦋 Iron — because your thyroid needs it to make hormones
Iron is sometimes overlooked when someone presents with fatigue, brain fog or low energy.
Iron supports thyroid peroxidase (TPO), an enzyme needed for thyroid hormone production.
Low iron and hypothyroidism can produce similar symptoms, particularly tiredness.
You can experience symptoms of low iron before you develop obvious anaemia.
Food sources include red meat, poultry, seafood, legumes, tofu and fortified foods. Vitamin C can also help improve absorption of plant-based iron.
My perspective: if someone remains exhausted despite sleeping well, I don’t automatically assume every symptom is caused by their thyroid. Iron status is one of the areas worth considering alongside thyroid function.
🦋 Zinc — for immune, gut and hormone function
Zinc has several roles that are relevant to thyroid health.
It supports normal immune function.
It contributes to normal hormone metabolism.
It supports maintenance of the gut lining.
Low food intake or poor absorption can increase the risk of inadequate zinc status.
Again, supplementation makes most sense when there is a genuine dietary or clinical reason for it.
🦋 Iodine — essential, but more is definitely not better
Your thyroid needs iodine to make T4 and T3.
Good food sources can include seafood, eggs, dairy, bread made with iodised salt and some seaweed-containing foods.
But this is an important area where people can easily overdo it.
Having Hashimoto’s or hypothyroidism does not automatically mean you need an iodine supplement.
Excess iodine can aggravate thyroid dysfunction in susceptible people.
High-dose iodine and kelp supplements should not be self-prescribed.
I prefer to look at the person's dietary intake and individual circumstances before recommending supplementation.
🦋 Tyrosine — one of the building blocks of thyroid hormones
Tyrosine is an amino acid used alongside iodine in thyroid hormone production.
You can obtain it naturally from protein-containing foods such as:
fish
meat
eggs
dairy
soy
beans and legumes
The body can also make tyrosine, which means supplements are not routinely necessary when someone is eating enough protein and meeting their nutritional needs.
🦋 Vitamin D — particularly important for immune health
Vitamin D helps regulate immune function and is being studied extensively in relation to autoimmune thyroid disease.
It also supports healthy bones and muscles.
Rather than automatically taking a high-dose supplement, I prefer to consider blood results and individual requirements and correct deficiency appropriately.
🦋 Myo-inositol — an interesting area of thyroid research
Myo-inositol is involved in the signalling that helps thyroid cells respond to TSH.
It has also been studied for its role in insulin signalling and glucose regulation.
Research often combines myo-inositol with selenium, and some small studies have reported improvements in mildly elevated TSH and certain thyroid antibodies.
It is promising, but it is not something I would automatically recommend to every person with a thyroid condition. Longer-term benefits are still being investigated.
🦋 Vitamin A — helping cells respond to thyroid hormone
Vitamin A contributes to normal thyroid hormone metabolism and helps regulate how cells respond to thyroid hormones.
This is another reason why a nutritionally adequate diet matters: making thyroid hormone is only one part of the story. The body also needs to be able to transport and respond to those hormones appropriately.
🦋 Magnesium and B vitamins — supporting energy and the nervous system
Magnesium supports:
energy production
muscle function
nervous system function
normal metabolic processes
B vitamins also help the body release energy from food and support the nervous system, while folate and B12 participate in important cellular processes including methylation.
Deficiency can contribute to tiredness, but this does not mean taking more will create more energy when your levels are already adequate.
🦋 Glutathione and NAC — supporting antioxidant defences
Glutathione is one of the body's major antioxidant systems.
It helps protect cells against oxidative stress and also supports the liver in processing certain substances for elimination.
NAC — N-acetylcysteine — provides cysteine, one of the building blocks the body uses to produce glutathione.
This is an area I consider in the wider context of nutrition and antioxidant status rather than treating NAC as a direct “thyroid treatment.”
🦋 Coenzyme Q10 (CoQ10) supports mitochondrial energy production and antioxidant defence.
It may be considered as part of an individualised nutrition or supplement plan, particularly where fatigue, oxidative stress or increased metabolic demands are relevant.
CoQ10 may be worth discussing in people with:
Hypothyroidism or after thyroidectomy — mainly from the perspective of supporting cellular energy production and antioxidant defence, rather than replacing thyroid hormone.
Autoimmune thyroid conditions such as Hashimoto’s — oxidative stress and antioxidant balance are areas of interest in autoimmune thyroid disease. CoQ10 may have a supportive role through its antioxidant functions.
People taking statins — statin medications can reduce circulating CoQ10 levels, so supplementation may sometimes be considered on an individual basis.
CoQ10 should be viewed as a supportive nutrient rather than a treatment for thyroid disease, and supplementation should be considered alongside medications, health history, pathology and overall dietary intake.
Don't forget your liver — T4 needs to become T3
This is one of the thyroid connections I think people should understand better.
Your thyroid produces mainly T4, but much of T4 still needs to be converted into T3, the more biologically active thyroid hormone used by tissues throughout the body.
And the thyroid gland is not doing all of that conversion itself.
The liver is an important site of T4-to-T3 conversion, alongside the kidneys and other tissues.
Your liver also continually processes hormones, medications and metabolic waste products.
Rather than looking for a “liver detox”, I focus on supporting normal liver function through everyday habits:
eat plenty of vegetables and fruit
include legumes and wholegrains if tolerated
eat enough protein
include healthy fats
add bitter vegetables such as rocket, chicory and radicchio
limit excessive alcohol
stay physically active
Your liver already knows how to detoxify your body. Our job is to give it the nutritional environment it needs to do that work.
And what does your gut microbiome have to do with your thyroid?
Quite a lot — although we need to be careful not to blame every thyroid problem on the microbiome.
Your digestive system affects how well you can digest food and absorb nutrients.
That matters because you can have a nutrient-rich diet, but if digestion or absorption is compromised, your body may not necessarily be receiving everything you think it is.
The gut and immune system are also closely connected, which is particularly relevant when we are discussing autoimmune thyroid conditions such as Hashimoto's.
This is why I may consider:
bloating or digestive discomfort
constipation or altered bowel habits
food intolerances
dietary fibre intake
plant diversity
digestive conditions that may affect nutrient absorption
whether microbiome testing would add useful information in an individual case
Changes in intestinal permeability and the microbiome are being investigated in autoimmune disease, but they do not explain every case of Hashimoto's, and there is no single “Hashimoto's microbiome”.
Do you need to give up gluten, dairy and broccoli?
Usually, this needs a much more individual answer than social media makes it sound.
Gluten: Coeliac disease is more common in people with autoimmune thyroid disease, so appropriate screening can be important. But everyone with Hashimoto's does not automatically need a gluten-free diet.
Dairy: Dairy does not automatically need to be removed either. I consider allergies, intolerances, symptoms and nutritional requirements.
Broccoli and cauliflower: Please don't be afraid of them. These vegetables provide fibre and valuable nutrients. Normal portions generally do not need to be avoided, and cooking further reduces their goitrogenic activity.
Unnecessary restriction can sometimes make it harder to meet the very nutrient requirements we are trying to support.
My approach: understand the reason before adding another supplement
When I work with someone with Hashimoto's, hypothyroidism or after thyroid surgery, my question isn't:
“What supplement can I give you for your thyroid?”
It is:
“What does your body need, and where might the gaps be?”
That may mean looking at:
your thyroid diagnosis and medical treatment
thyroid pathology and other relevant blood results
protein and overall dietary intake
iron, selenium, zinc, iodine, vitamin D and other nutrients
digestion and nutrient absorption
your gut health and microbiome
sleep and stress
lifestyle
medications and current supplements
Because personalised thyroid nutrition should complement your medical care — not compete with it.
Not sure what you should focus on?
You don't need to take every nutrient mentioned in this article.
In fact, you probably shouldn't.
The more useful question is whether your current diet, symptoms, health history, pathology, digestive function and thyroid condition suggest that there is something specific worth addressing.
This is where personalised thyroid nutrition support can help bridge the gap between knowing that nutrients matter and understanding what actually matters for you.
During a Thyroid Nutrition Support consultation, I review your health and thyroid history, current diet, symptoms, relevant pathology, medications and supplements and help you build a practical nutrition strategy around your individual needs.
90-minute initial consultation · A$225 · Online Australia-wide
Your thyroid is part of a much bigger system.
Let's look at the thyroid, nutrients, gut and lifestyle together — and personalise the next steps to you.
About the Author
Ola Krawczyk is a Polish-Australian Clinical Nutritionist, accredited ATMS member, SIBO-Certified Nutritionist and Microba Certified Nutritionist specialising in SIBO, digestive health, microbiome interpretation, thyroid health and perimenopause nutrition.
Her professional approach is also informed by her personal experience with SIBO, thyroid and hormonal health challenges. Ola provides personalised online nutrition consultations across Australia through Clinical Nutrition by Ola.
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