What Supplements Should I Take For My Thyroid?

There are certain supplements that support thyroid function and maintaining optimal levels. It’s important to consider other possible problems, so not just your thyroid, such as low vitamin levels and other health conditions that can cause symptoms similar to hypothyroidism.

Supplementing may help with symptoms. 


I would always recommend consulting your doctor, pharmacist, a medical professional etc. before making any changes to your health regime. It can be dangerous if you take supplements and already have high/sufficient levels.

Most vitamins can be tested via doctors’ tests to learn your levels. 

  • B Vitamins/B-Complex – (B1, B2, B3, B6, B12) Can help tiredness, fatigue, metabolism and promote adrenal health and function. Vitamin B-12 and folic acid are both important for energy and heart protection. Folic acid is also good for preventing neural tube defects in a developing baby. It is also needed in order to make TSH. B3 is needed to keep all the body’s cells (including the endocrine glands) in efficient working order. People with hypothyroidism struggle to absorb B12.  A lack of B12 can cause mental illness, various neurological disorders, neuralgia, neuritis and bursitis.
  • Vitamin E – An antioxidant, vitamin E is a fat-soluble vitamin important for many processes in the body, including producing TSH.
  • Selenium – Helps conversion of T4 to T3. Without it, T3 cannot be produced in the right amounts, and organs will function as if they are hypothyroid even though blood test levels are ‘normal’.
  • Vitamin C – Essential for the immune System, adrenals. The adrenal gland contains the highest concentration of vitamin C in the body. C plays a crucial role in both the adrenal cortex and adrenal medulla, which are responsible for responding to stress.
  • Iodine – A controversial one, many say you should only supplement it if you are definitely low in it, as it can do more harm than good if not. Sufficient iodine is needed to make thyroid hormone T4.
  • Vitamin D3 and A – Good for joints, fatigue and a deficiency  in vitamin A or D can also stop T3 from correcting your metabolic rate and so leave you with low energy, cold intolerance and weight gain. Vitamin A must be accompanied by protein to make it available to the body, so if you are on a low protein diet, you may be deficient in this.  If you are low on Vitamin A, your ability to produce TSH is limited. This vitamin is required by the body to convert T4 to T3. Vitamin D has also been shown to lower antibodies – http://www.ncbi.nlm.nih.gov/pubmed/27186560.
  • Vitamin K2 – Always take D with K2. K2 regulates calcium in the blood, so combining vitamin K2 with vitamin D3 is highly recommended because of the synergy between the two vitamins. Research shows a slower progression of calcification in those taking both vitamin K2 and vitamin D compared to those taking vitamin D alone.
  • Zinc – Needed in order to make TSH. Research has shown that both hypothyroidism and hyperthyroidism result in zinc deficiency.  It also plays a role in the functioning of the immune system. Low zinc levels have been found to be common in obese people.  Zinc is needed to convert T4 into T3.
  • Fish Oil/Omega 3/Cod Liver Oil. – Cod Liver Oil is one of the best sources of omega 3 fatty acids (EPA and DHA) and contains relatively high amounts of vitamin A and D. Good for lowering high blood pressure, reducing risk of osteoarthritis and maintaining joint and bone health.
  • Magnesium – Needed in order to make TSH and for the conversion of T4 into T3. It seems that a diet high in refined food and caffeine will encourage magnesium loss. Magnesium can also help cramps, energy and aches and pains.

You can click on the hyperlinks in the above post to learn more and see references to information given, but more reading and references can also be found at:






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I run a Facebook group, called Thyroid Family: Hypothyroidism Advice & Support Group. This group is for underactive thyroid/hypothyroidism patients only, and not medical professionals or anyone else. If you have any questions on living with hypothyroidism, or want some support, help or advice, please join us. 

I also run a group for the spouses, partners and other halves of hypothyroid patients, called Hypothyroid Patients Other Halves – Support & Advice Group. This is for the other halves only and not patients. 


About Rachel Hill, The Invisible Hypothyroidism

Diagnosed with Hypothyroidism, Hashimoto’s Thyroiditis and Chronic Fatigue Syndrome (ME), as well as having Adrenal Fatigue and experience with Depression and Anxiety Disorder, Rachel Hill blogs at theinvisiblehypothyroidism.com to help others, covering all aspects of what it’s like to have these conditions. Rachel is one of the many faces of thyroid disease and she’s passionate about helping those with hypothyroidism and giving them a voice.
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3 Responses to What Supplements Should I Take For My Thyroid?

  1. Pingback: Acid Reflux/Low Stomach Acid and Hypothyroidism. | The Invisible Hypothyroidism

  2. Madison says:

    Do you take all of these at the same time or pick which ones you need?


  3. Test as many as possible before deciding whether to supplement and spread them out throughout the day. Some shouldn’t be taken together and some certainly need taking with food.


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