Overview

SCIENTIFIC SCORE
Questionable
Based on 17 Researches
6.9
USERS' SCORE
Moderately Good
Based on 39 Reviews
7.8
Supplement Facts
Serving Size: 1 Vegetarian Capsule
Amount Per Serving
%DV
Vitamin E (as D-alpha tocopheryl succinate)
20.1 mg
134%
Selenium (as Se-Methyl L-Selenocysteine, L-selenomethionine (yeast-free), sodium selenite)
200 mcg
364%

Top Medical Research Studies

9
Selenium aids Graves' orbitopathy treatment
We explored how selenium supplementation might help individuals suffering from Graves' orbitopathy, an autoimmune disorder linked to thyroid dysfunction. Our approach involved a systematic review and meta-analysis that assessed results from four randomized controlled trials.

The findings revealed that selenium supplementation had a significant positive impact on various aspects of Graves' orbitopathy. Over a period of six months, patients taking selenium showed a notable reduction in clinical activity scores, which reflect the severity of eye symptoms. Furthermore, their quality of life also improved significantly.

We observed improvements not only in the overall quality of life specific to eye conditions, but also in visual and psychological functioning scores. Additionally, selenium appeared to reduce the width of the eyelids, providing further benefits for eye-related symptoms. However, we found no significant changes in other areas, such as eye bulging or muscle movement abilities.

Importantly, selenium supplementation was deemed safe with minor side effects reported, suggesting it could be a viable option for managing Graves' orbitopathy. While our results are promising, we believe further research is needed to thoroughly validate the long-term effectiveness and safety of selenium treatment for this condition.
Read More
0
We aimed to explore how selenium affects autoimmune thyroid disease (AITD), specifically looking at three conditions: autoimmune thyroiditis (AIT), autoimmune hyperthyroidism (AIH), and Graves' disease (GD). Using a research method called Mendelian randomization, we analyzed genetic data to establish potential causal links between selenium levels and these autoimmune disorders.

Our findings highlighted an important conclusion: selenium does not appear to have a significant impact on the risk of developing AIT, AIH, or GD. The statistical analysis revealed no causal relationship, and we found that the odds ratios for each condition were close to one, indicating no discernible benefit from selenium.

Given these results, it is clear that indiscriminate supplementation of selenium for individuals with autoimmune thyroid conditions is not supported. Patients should avoid unnecessary selenium intake unless they are specifically deficient in this nutrient.
Read More
We explored the effects of selenium supplements on patients with Hashimoto's thyroiditis, an autoimmune disorder that can affect thyroid function. Through a structured analysis of studies, we focused on how selenium could potentially lower the levels of thyroid autoantibodies.

Our research involved a careful review of data from reputable databases, including PubMed and Cochrane, which identified several studies examining the effectiveness of selenium, Vitamin D, and Myo-inositol. Among these, the results showed that selenium supplementation significantly reduced both thyroid peroxidase autoantibodies (TPOAb) and thyroglobulin autoantibodies (TgAb) when compared to a placebo group.

Interestingly, other supplements like Myo-inositol and Vitamin D, both individually and in combination with selenium, did not show a significant effect in reducing the autoantibody levels. Based on these findings, it appears that incorporating selenium into treatment regimens may offer a beneficial adjunct for those managing Hashimoto's thyroiditis.
Read More

Most Useful Reviews

9
Improved skin health
256 people found this helpful
Great supplement! I’m currently on my second jar, as advised by a nutritionist based on test results. After a short time, she observed that my skin became incredibly smooth, with cracks and dryness disappearing. My chronic runny nose and congestion have also resolved, leading to an overall improvement in my condition. Selenium is advised to take in courses for those with thyroid issues. I will order more!
Read More
0
Negative side effects
81 people found this helpful
I started taking this following my doctor's advice for autoimmune thyroiditis. Initially, it seemed fine, but after four days, I experienced swelling and weakness. I did not immediately link these symptoms to the supplement. After stopping it, my health did not return to normal until two or three days later. I cannot recommend this product!
Read More
9
Lowered antibodies
71 people found this helpful
With my autoimmune thyroid disease, I discovered that selenium is vital for our body's functioning. After my first bottle, my antibody levels dropped to normal, surprising my doctor. The inclusion of vitamin E as an antioxidant is excellent. This is a working supplement I wholeheartedly recommend!
Read More

Medical Researches

SCIENTIFIC SCORE
Questionable
Based on 17 Researches
6.9
  • All Researches
We explored the effects of selenium supplements on patients with Hashimoto's thyroiditis, an autoimmune disorder that can affect thyroid function. Through a structured analysis of studies, we focused on how selenium could potentially lower the levels of thyroid autoantibodies.

Our research involved a careful review of data from reputable databases, including PubMed and Cochrane, which identified several studies examining the effectiveness of selenium, Vitamin D, and Myo-inositol. Among these, the results showed that selenium supplementation significantly reduced both thyroid peroxidase autoantibodies (TPOAb) and thyroglobulin autoantibodies (TgAb) when compared to a placebo group.

Interestingly, other supplements like Myo-inositol and Vitamin D, both individually and in combination with selenium, did not show a significant effect in reducing the autoantibody levels. Based on these findings, it appears that incorporating selenium into treatment regimens may offer a beneficial adjunct for those managing Hashimoto's thyroiditis.
Read More
9
Selenium aids Graves' orbitopathy treatment
We explored how selenium supplementation might help individuals suffering from Graves' orbitopathy, an autoimmune disorder linked to thyroid dysfunction. Our approach involved a systematic review and meta-analysis that assessed results from four randomized controlled trials.

The findings revealed that selenium supplementation had a significant positive impact on various aspects of Graves' orbitopathy. Over a period of six months, patients taking selenium showed a notable reduction in clinical activity scores, which reflect the severity of eye symptoms. Furthermore, their quality of life also improved significantly.

We observed improvements not only in the overall quality of life specific to eye conditions, but also in visual and psychological functioning scores. Additionally, selenium appeared to reduce the width of the eyelids, providing further benefits for eye-related symptoms. However, we found no significant changes in other areas, such as eye bulging or muscle movement abilities.

Importantly, selenium supplementation was deemed safe with minor side effects reported, suggesting it could be a viable option for managing Graves' orbitopathy. While our results are promising, we believe further research is needed to thoroughly validate the long-term effectiveness and safety of selenium treatment for this condition.
Read More
9
Selenium benefits autoimmune thyroiditis
The study we looked into focused on selenium's impact on autoimmune thyroiditis, particularly Hashimoto's thyroiditis. By analyzing whether selenium supplementation could offer relief or improvement in symptoms, we delved into its potential benefits for patients battling this often frustrating condition.

Through careful examination and relevant data, we observed that selenium may play a significant role in managing autoimmune thyroid disorders. Patients receiving selenium supplements tended to show improved thyroid function and reduced autoimmune response markers. This finding opens the door for a natural approach to complement traditional treatments in dealing with Hashimoto’s.

Overall, we found evidence supporting the use of selenium as a valuable addition to the treatment regimen for patients with autoimmune thyroiditis. This research enhances our understanding of how selenium could provide benefits and encourages further exploration in this area.
Read More
We observed that selenium, an essential micronutrient, significantly impacts thyroid health, especially in the context of autoimmune disorders. When serum selenium levels are low, such as in conditions like autoimmune thyroiditis, glutathione peroxidase activity decreases. This decline can lead to increased oxidative stress, resulting in further damage to thyroid tissue.

Specifically, in cases of Graves' disease, selenium supplementation has been found to help patients achieve euthyroidism more quickly. It also appears to improve overall quality of life and may reduce symptoms associated with the disease, such as less orbital involvement and slowed progression of eye complications. This suggests that selenium not only supports metabolic processes but may also provide therapeutic benefits in specific autoimmune conditions.

However, while some studies do point to selenium's potential advantages, the current body of evidence remains somewhat limited. There is still not enough conclusive data to fully endorse selenium supplementation for all patients with thyroid disorders. We recognize that future research needs to clarify the exact role of selenium in preventing or treating thyroid diseases.
Read More
8
Selenium improves gut immune health
We explored the effects of selenium treatment on immune dysregulation in lupus, a common autoimmune disorder. In our study, we compared mice with lupus to healthy control mice using advanced single-cell RNA sequencing techniques. This research aimed to clarify whether selenium could help improve gut health and alleviate symptoms associated with lupus.

Our findings revealed a significant decrease in specific immune cells known as CD8αα + intraepithelial lymphocytes (IELs) in the lupus mice. At the same time, we observed an increase in another type of immune cell, CD8αβ + IELs, which displayed enhanced activity. Notably, selenium treatment effectively reversed the loss of a particular subset of immune cells known as γδT. This treatment also improved the gut barrier, which is crucial for immune health, and helped alleviate some lupus symptoms.

As we analyzed the data, it became clear that selenium not only supports the immune system by restoring certain cell types but also reduces oxidative stress in the gut. By enhancing the gut's immunological environment, selenium may provide new avenues for managing lupus and other autoimmune disorders.
Read More

User Reviews

USERS' SCORE
Moderately Good
Based on 39 Reviews
7.8
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9
Improved skin health
256 people found this helpful
Great supplement! I’m currently on my second jar, as advised by a nutritionist based on test results. After a short time, she observed that my skin became incredibly smooth, with cracks and dryness disappearing. My chronic runny nose and congestion have also resolved, leading to an overall improvement in my condition. Selenium is advised to take in courses for those with thyroid issues. I will order more!
Read More
0
Negative side effects
81 people found this helpful
I started taking this following my doctor's advice for autoimmune thyroiditis. Initially, it seemed fine, but after four days, I experienced swelling and weakness. I did not immediately link these symptoms to the supplement. After stopping it, my health did not return to normal until two or three days later. I cannot recommend this product!
Read More
9
Lowered antibodies
71 people found this helpful
With my autoimmune thyroid disease, I discovered that selenium is vital for our body's functioning. After my first bottle, my antibody levels dropped to normal, surprising my doctor. The inclusion of vitamin E as an antioxidant is excellent. This is a working supplement I wholeheartedly recommend!
Read More
9
Supports thyroid health
29 people found this helpful
My favourite selenium! Prescribed by a neurologist, this supplement helps my three-year-old fight oxidation and supports their thyroid gland. I’ve ordered more and now take it with my husband too. I appreciate its added vitamin E for better absorption. Quality is excellent.
Read More
9
Improved thyroid function
28 people found this helpful
Prescribed for hyperthyroid function, I find it beneficial for everyone regardless of thyroid issues. A friend not only stopped her hair loss while taking it, but I also noticed my face and back rashes disappeared. My energy improved, and my thyroid function is better. The doctor is pleased with this complex, and I plan to continue taking it intermittently.
Read More

Frequently Asked Questions

9
Reduces antibodies level
1 people found this helpful
The endocrinologist advised a higher selenium intake due to elevated antibody levels. After two months, testing showed a decrease in antibodies. While it's a medicinal drug, I recommend it for those with medical needs, cautioning against indiscriminate use. A lower dosage is better for prevention.
8
Improved thyroid function
6 people found this helpful
This selenium supplement features three highly digestible forms, making it bioavailable. It significantly boosts my thyroid function when combined with vitamin E. However, those with elevated homocysteine should consider other forms. I appreciate this supercomplex and find my thyroid’s performance has markedly improved over the three-month course I take.
9
Hair loss prevention
1 people found this helpful
I ordered again as I felt the benefits mid-course while taking selenium. My hair had been falling out heavily, but the loss diminished significantly. However, I regret cancelling my Teroxin when I started selenium; I believe the effects would be more pronounced together. I’m eagerly awaiting my parcel to restart the treatment.
5
No noticeable effect
1 people found this helpful
I didn’t observe any effects from this product. I can't say it was good or bad, so I won't reorder it.
9
Lowered antibodies
71 people found this helpful
With my autoimmune thyroid disease, I discovered that selenium is vital for our body's functioning. After my first bottle, my antibody levels dropped to normal, surprising my doctor. The inclusion of vitamin E as an antioxidant is excellent. This is a working supplement I wholeheartedly recommend!
9
Improved skin health
256 people found this helpful
Great supplement! I’m currently on my second jar, as advised by a nutritionist based on test results. After a short time, she observed that my skin became incredibly smooth, with cracks and dryness disappearing. My chronic runny nose and congestion have also resolved, leading to an overall improvement in my condition. Selenium is advised to take in courses for those with thyroid issues. I will order more!
8.5
Increased energy
5 people found this helpful
A vital mineral for the body, it helps combat atherosclerosis and boost the immune system. After two weeks of taking it, my health improved, and I felt more energetic with no signs of spring depression, a stark contrast to my previous state of apathy.
0
Negative side effects
81 people found this helpful
I started taking this following my doctor's advice for autoimmune thyroiditis. Initially, it seemed fine, but after four days, I experienced swelling and weakness. I did not immediately link these symptoms to the supplement. After stopping it, my health did not return to normal until two or three days later. I cannot recommend this product!
7.5
Supports thyroid health
27 people found this helpful
I always take selenium with iodine to support my thyroid and nervous system, especially crucial for those not living near the sea. I trust the Life Extension brand for its effectiveness and affordability. With the added vitamin E, absorption is faster, and the small capsules are easy to swallow. I will order more!
9
Essential for autoimmune
2 people found this helpful
Selenium is indispensable for my autoimmune thyroiditis, especially when combined with vitamin D3. Previously, I used a German brand with no results. I prefer this one, which has a unique garlic taste and smell, taking one tablet each morning.
7.5
Reduced antibody levels
4 people found this helpful
Selenium plays a major role in producing glutathione peroxidase, essential for protecting the thyroid. Research shows 200μg per day can reduce thyroid-related antibodies after a few months. Some users might achieve normalisation of antibodies with selenium alone, which is promising for those with autoimmune thyroid disease.
9
Supports recovery post-covid
4 people found this helpful
An endocrinologist prescribed selenium for thyroid issues post-covid. It's vital for thyroid function, and after showing my doctor the supplement, she approved it. I take it every other day per her dosage advice and alternate with other treatments, which have worked wonders!
We observed that selenium, an essential micronutrient, significantly impacts thyroid health, especially in the context of autoimmune disorders. When serum selenium levels are low, such as in conditions like autoimmune thyroiditis, glutathione peroxidase activity decreases. This decline can lead to increased oxidative stress, resulting in further damage to thyroid tissue.

Specifically, in cases of Graves' disease, selenium supplementation has been found to help patients achieve euthyroidism more quickly. It also appears to improve overall quality of life and may reduce symptoms associated with the disease, such as less orbital involvement and slowed progression of eye complications. This suggests that selenium not only supports metabolic processes but may also provide therapeutic benefits in specific autoimmune conditions.

However, while some studies do point to selenium's potential advantages, the current body of evidence remains somewhat limited. There is still not enough conclusive data to fully endorse selenium supplementation for all patients with thyroid disorders. We recognize that future research needs to clarify the exact role of selenium in preventing or treating thyroid diseases.
8
Selenium improves gut immune health
We explored the effects of selenium treatment on immune dysregulation in lupus, a common autoimmune disorder. In our study, we compared mice with lupus to healthy control mice using advanced single-cell RNA sequencing techniques. This research aimed to clarify whether selenium could help improve gut health and alleviate symptoms associated with lupus.

Our findings revealed a significant decrease in specific immune cells known as CD8αα + intraepithelial lymphocytes (IELs) in the lupus mice. At the same time, we observed an increase in another type of immune cell, CD8αβ + IELs, which displayed enhanced activity. Notably, selenium treatment effectively reversed the loss of a particular subset of immune cells known as γδT. This treatment also improved the gut barrier, which is crucial for immune health, and helped alleviate some lupus symptoms.

As we analyzed the data, it became clear that selenium not only supports the immune system by restoring certain cell types but also reduces oxidative stress in the gut. By enhancing the gut's immunological environment, selenium may provide new avenues for managing lupus and other autoimmune disorders.
We explored the effects of selenium supplements on patients with Hashimoto's thyroiditis, an autoimmune disorder that can affect thyroid function. Through a structured analysis of studies, we focused on how selenium could potentially lower the levels of thyroid autoantibodies.

Our research involved a careful review of data from reputable databases, including PubMed and Cochrane, which identified several studies examining the effectiveness of selenium, Vitamin D, and Myo-inositol. Among these, the results showed that selenium supplementation significantly reduced both thyroid peroxidase autoantibodies (TPOAb) and thyroglobulin autoantibodies (TgAb) when compared to a placebo group.

Interestingly, other supplements like Myo-inositol and Vitamin D, both individually and in combination with selenium, did not show a significant effect in reducing the autoantibody levels. Based on these findings, it appears that incorporating selenium into treatment regimens may offer a beneficial adjunct for those managing Hashimoto's thyroiditis.
9
Selenium aids Graves' orbitopathy treatment
We explored how selenium supplementation might help individuals suffering from Graves' orbitopathy, an autoimmune disorder linked to thyroid dysfunction. Our approach involved a systematic review and meta-analysis that assessed results from four randomized controlled trials.

The findings revealed that selenium supplementation had a significant positive impact on various aspects of Graves' orbitopathy. Over a period of six months, patients taking selenium showed a notable reduction in clinical activity scores, which reflect the severity of eye symptoms. Furthermore, their quality of life also improved significantly.

We observed improvements not only in the overall quality of life specific to eye conditions, but also in visual and psychological functioning scores. Additionally, selenium appeared to reduce the width of the eyelids, providing further benefits for eye-related symptoms. However, we found no significant changes in other areas, such as eye bulging or muscle movement abilities.

Importantly, selenium supplementation was deemed safe with minor side effects reported, suggesting it could be a viable option for managing Graves' orbitopathy. While our results are promising, we believe further research is needed to thoroughly validate the long-term effectiveness and safety of selenium treatment for this condition.
0
We aimed to explore how selenium affects autoimmune thyroid disease (AITD), specifically looking at three conditions: autoimmune thyroiditis (AIT), autoimmune hyperthyroidism (AIH), and Graves' disease (GD). Using a research method called Mendelian randomization, we analyzed genetic data to establish potential causal links between selenium levels and these autoimmune disorders.

Our findings highlighted an important conclusion: selenium does not appear to have a significant impact on the risk of developing AIT, AIH, or GD. The statistical analysis revealed no causal relationship, and we found that the odds ratios for each condition were close to one, indicating no discernible benefit from selenium.

Given these results, it is clear that indiscriminate supplementation of selenium for individuals with autoimmune thyroid conditions is not supported. Patients should avoid unnecessary selenium intake unless they are specifically deficient in this nutrient.
We aimed to understand how selenium, an essential mineral, affects individuals with autoimmune disorders, specifically inflammatory rheumatic musculoskeletal diseases (iRMD) such as rheumatoid arthritis (RA), psoriatic arthritis (PsA), and juvenile idiopathic arthritis (JIA). To do this, we analyzed serum samples from a diverse group of 272 patients, including those with RA, PsA, JIA, and osteoarthritis (OA) compared to healthy subjects.

The study revealed that the levels of selenium and its transport protein, selenoprotein P (SELENOP), were lower in patients with iRMD. Interestingly, while selenium levels did not significantly differ among the patient groups, SELENOP was notably low across the board in comparison to healthy individuals. Additionally, we observed that the antioxidant enzyme glutathione peroxidase 3 (GPx3) showed reduced activity in patients with JIA and PsA.

Although these findings point towards a deficiency in selenoproteins among most patients with autoimmune disorders, we should note that we did not find evidence suggesting simple selenium supplementation could directly improve conditions. However, our results did highlight a relationship between SELENOP levels and functional status in OA patients, suggesting that better selenium transport may help alleviate some disease burden.

In summary, while increasing selenium intake could help enhance selenoprotein production in patient populations, we must approach treatment options thoughtfully to address individual deficiencies and improve overall health outcomes.

References

  1. Souza LSL, Campos RO, Braga JS, Jesus JDS, Ramos HE, et al. Selenium nutritional status and thyroid dysfunction. Arch Endocrinol Metab. 2025;69:e230348. 10.20945/2359-4292-2023-0348
  2. Wang Q, Wu Y, Ouyang L, Min X, Zheng M, et al. Single-cell analyses of intestinal epithelium reveal the dysregulation of gut immune microenvironment in systemic lupus erythematosus. J Transl Med. 2025;23:118. 10.1186/s12967-025-06147-5
  3. Peng B, Wang W, Gu Q, Wang P, Teng W, et al. Effects of different supplements on Hashimoto's thyroiditis: a systematic review and network meta-analysis. Front Endocrinol (Lausanne). 2024;15:1445878. 10.3389/fendo.2024.1445878
  4. Wahl L, Samson Chillon T, Seemann P, Ohrndorf S, Ochwadt R, et al. Serum selenium, selenoprotein P and glutathione peroxidase 3 in rheumatoid, psoriatic, juvenile idiopathic arthritis, and osteoarthritis. J Nutr Biochem. 2025;135:109776. 10.1016/j.jnutbio.2024.109776
  5. Sharabati I, Qafesha RM, Hindawi MD, Amro S, Ayesh BM. The efficacy and safety of selenium supplementation versus placebo in the treatment of Graves' orbitopathy: A systematic review and meta-analysis of randomised controlled trials. Clin Endocrinol (Oxf). 2024;101:669. 10.1111/cen.15128
  6. Chung CW, Kim K, Park SK, Ju DL, Park YJ, et al. Selenium levels and their association with thyroid autoimmunity and severe preeclampsia in pregnancy: Insights from a prospective ideal breast milk cohort study. Eur Thyroid J. 2024;13. 10.1530/ETJ-24-0007
  7. Hu C, Yu YF, Tong KK, Hu G, Wu JY, et al. A Mendelian randomization study of the effect of selenium on autoimmune thyroid disease. Eur Rev Med Pharmacol Sci. 2024;28:2988. 10.26355/eurrev_202404_36011
  8. Khalil DY, Hussein RH, El-Kholy WM. Mesenchymal Stem Cell-Derived Exosomes Loaded with Selenium or Nano Selenium as a Novel Therapeutic Paradigm for Streptozotocin-Induced Type 1 Diabetes in Rats. Biology (Basel). 2024;13. 10.3390/biology13040253
  9. Potita P, Pruksakorn V, Srichomkwun P, Kingpetch K, Saonanon P. Selenium supplementation in inactive moderate to severe Graves' orbitopathy patients: a randomized controlled trial. Orbit. 2024;43:329. 10.1080/01676830.2024.2315566
  10. Duntas LH. Reassessing Selenium for the Management of Hashimoto's Thyroiditis: The Selini Shines Bright for Autoimmune Thyroiditis Patients. Thyroid. 2024;34:292. 10.1089/thy.2024.0078
  11. Wang S, Chen P, He Y, Wei J, Tian L, et al. A follow-up study on factors affecting the recovery of patients with hypothyroidism in different selenium environments. BMC Endocr Disord. 2024;24:14. 10.1186/s12902-024-01536-1
  12. Huwiler VV, Maissen-Abgottspon S, Stanga Z, Mühlebach S, Trepp R, et al. Selenium Supplementation in Patients with Hashimoto Thyroiditis: A Systematic Review and Meta-Analysis of Randomized Clinical Trials. Thyroid. 2024;34:295. 10.1089/thy.2023.0556
  13. Wang C, Qiao J, Liu S, Piao S, Zhou Y, et al. Selenium in the treatment of mild-to-moderate Graves' orbitopathy: a 5-year prospective controlled cohort study. Endocrine. 2024;84:1072. 10.1007/s12020-023-03672-5
  14. Yavari M, Akbari M, Ramezani Ahmadi A, Siavash Dastjerdi M, Hashemi MS. Investigating the effect of combined use of selenium and Myo-inositol supplements on thyroid function and autoimmune characteristics in thyroid disorders: a systematic review and meta-analysis. Expert Rev Endocrinol Metab. 2024;19:269. 10.1080/17446651.2023.2295487
  15. Foos W, Maliakkal Hernandez J, Mansour TN. Selenium supplementation in thyroid eye disease: an updated review from a clinical ophthalmic perspective. Orbit. 2024;43:790. 10.1080/01676830.2023.2276783
  16. Rezaeimanesh N, Rafiee P, Saeedi R, Khosravian P, Sahraian MA, et al. The effect of crocin-selenium nanoparticles on the cognition and oxidative stress markers of multiple sclerosis patients: a randomized triple-blinded placebo-controlled clinical trial. Biometals. 2024;37:305. 10.1007/s10534-023-00548-z
  17. Chen X, Yang Y, Chen J, He Y, Huang Y, et al. Dual-driven selenium Janus single-atom nanomotors for autonomous regulating mitochondrial oxygen imbalance to catalytic therapy of rheumatoid arthritis. Redox Biol. 2025;81:103574. 10.1016/j.redox.2025.103574
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