Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 10 Researches
8.2
USERS' SCORE
Moderately Good
Based on 6 Reviews
7.3
Supplement Facts
Serving Size: 1 Veg Capsule
Amount Per Serving
%DV
Iodine (from Organic Kelp)(Laminaria spp.) (Whole Plant)
325 mcg
217%†
Top Medical Research Studies
9.5
We looked into the growing concern of iodine deficiency hypothyroidism among children in the United States. This condition, which can lead to cognitive and physical impairments, was thought to be largely eliminated thanks to universal salt iodization started in the 1920s. However, recent trends suggest that iodine deficiency could be reappearing due to increased use of noniodized salts, lower iodine levels in dairy, and dietary restrictions like veganism or food allergies.
Over an 18-month period, we documented a series of cases where three children were diagnosed with iodine deficiency hypothyroidism despite having no underlying thyroid dysfunction. Their clinical presentations varied significantly—some had large goiters while others showed mild or no goiter at all. The results of their biochemical tests also highlighted a range of thyroid-stimulating hormone elevations.
Importantly, all patients returned to normal thyroid function following iodine supplementation. We propose that measuring spot urine iodine levels alongside elevated serum thyroglobulin could serve as a simpler and effective diagnostic approach, moving away from the more complex 24-hour urinary iodine tests. Our findings shine a light on the necessity of addressing iodine deficiency in today’s dietary landscape.
Over an 18-month period, we documented a series of cases where three children were diagnosed with iodine deficiency hypothyroidism despite having no underlying thyroid dysfunction. Their clinical presentations varied significantly—some had large goiters while others showed mild or no goiter at all. The results of their biochemical tests also highlighted a range of thyroid-stimulating hormone elevations.
Importantly, all patients returned to normal thyroid function following iodine supplementation. We propose that measuring spot urine iodine levels alongside elevated serum thyroglobulin could serve as a simpler and effective diagnostic approach, moving away from the more complex 24-hour urinary iodine tests. Our findings shine a light on the necessity of addressing iodine deficiency in today’s dietary landscape.
Read More
9.5
We explored the impact of iodine treatment on hypothyroidism, particularly focusing on a unique case involving a patient who had undergone total entero-colectomy. In this situation, standard methods of administering iodine, such as oral supplements, proved ineffective due to absorption challenges. Our approach utilized ethiodized oil, an iodine-rich contrast agent, which we injected intramuscularly.
We observed that this method not only addressed the patient's goiter but also sustained normal thyroid function for more than five years. The long half-life of ethiodized oil made it an ideal option for patients reliant on parenteral nutrition, who often struggle with iodine deficiency.
This study highlights a promising alternative for individuals facing similar nutritional challenges due to severe digestive issues. Overall, our findings suggest that tailored iodine administration could offer a viable solution for hypothyroidism linked to dietary deficiencies.
We observed that this method not only addressed the patient's goiter but also sustained normal thyroid function for more than five years. The long half-life of ethiodized oil made it an ideal option for patients reliant on parenteral nutrition, who often struggle with iodine deficiency.
This study highlights a promising alternative for individuals facing similar nutritional challenges due to severe digestive issues. Overall, our findings suggest that tailored iodine administration could offer a viable solution for hypothyroidism linked to dietary deficiencies.
Read More
9
We examined a unique case of a 9-year-old boy who developed severe hypothyroidism from iodine deficiency, likely caused by a restrictive diet. In a quick intervention, we administered a kelp supplement, which effectively corrected both his hypothyroidism and iodine deficiency.
This case highlights the potential benefits of using kelp as a natural iodine source, particularly in situations where dietary restrictions may lead to deficiencies. However, this is a singular report, so broader studies are necessary to confirm these findings.
This case highlights the potential benefits of using kelp as a natural iodine source, particularly in situations where dietary restrictions may lead to deficiencies. However, this is a singular report, so broader studies are necessary to confirm these findings.
Read More
Most Useful Reviews
0
Avoid iodine supplements
22 people found this helpful
I do not recommend iodine supplements for Hashimoto's/hypothyroidism. After my diagnosis, I believed I needed iodine and thought this product was safe due to its smaller amount of natural iodine. An expert informed me that iodine supplementation is unnecessary and can cause harm in my condition. Many doctors misunderstand thyroid disorders and offer inaccurate traditional advice. Natural iodine can worsen autoimmune diseases by triggering the immune system to further destroy the thyroid, even if one feels initial relief. I stress the importance of proper diagnosis and the dangers of self-medicating with iodine supplements.
Read More
10
Cured my hypothyroidism
6 people found this helpful
A great quality natural iodine source. NOW Foods maintains excellent quality control to ensure this kelp doesn't contain excessive mercury or arsenic, which supports my thyroid's hormone production. Taking this daily has cured my hypothyroidism. One concern is that the lid doesn't seal adequately, so I store my supplements in the fridge to avoid moisture.
Read More
7.5
Natural treatment success
5 people found this helpful
I’m satisfied. Reviewing supplements is challenging since benefits aren’t always obvious. I’ve had hypothyroidism for years and treated it naturally. By meticulously following a strict alkaline diet along with certain daily supplements, I've greatly diminished or eliminated most symptoms and feel much better. After extensive research and consultations with multiple naturopathic doctors, I can say this supplement has positively impacted my regimen. I’m pleased with the quality and value and will repurchase.
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 10 Researches
8.2
- All Researches
9.5
We looked into the growing concern of iodine deficiency hypothyroidism among children in the United States. This condition, which can lead to cognitive and physical impairments, was thought to be largely eliminated thanks to universal salt iodization started in the 1920s. However, recent trends suggest that iodine deficiency could be reappearing due to increased use of noniodized salts, lower iodine levels in dairy, and dietary restrictions like veganism or food allergies.
Over an 18-month period, we documented a series of cases where three children were diagnosed with iodine deficiency hypothyroidism despite having no underlying thyroid dysfunction. Their clinical presentations varied significantly—some had large goiters while others showed mild or no goiter at all. The results of their biochemical tests also highlighted a range of thyroid-stimulating hormone elevations.
Importantly, all patients returned to normal thyroid function following iodine supplementation. We propose that measuring spot urine iodine levels alongside elevated serum thyroglobulin could serve as a simpler and effective diagnostic approach, moving away from the more complex 24-hour urinary iodine tests. Our findings shine a light on the necessity of addressing iodine deficiency in today’s dietary landscape.
Over an 18-month period, we documented a series of cases where three children were diagnosed with iodine deficiency hypothyroidism despite having no underlying thyroid dysfunction. Their clinical presentations varied significantly—some had large goiters while others showed mild or no goiter at all. The results of their biochemical tests also highlighted a range of thyroid-stimulating hormone elevations.
Importantly, all patients returned to normal thyroid function following iodine supplementation. We propose that measuring spot urine iodine levels alongside elevated serum thyroglobulin could serve as a simpler and effective diagnostic approach, moving away from the more complex 24-hour urinary iodine tests. Our findings shine a light on the necessity of addressing iodine deficiency in today’s dietary landscape.
Read More
9.5
We explored the impact of iodine treatment on hypothyroidism, particularly focusing on a unique case involving a patient who had undergone total entero-colectomy. In this situation, standard methods of administering iodine, such as oral supplements, proved ineffective due to absorption challenges. Our approach utilized ethiodized oil, an iodine-rich contrast agent, which we injected intramuscularly.
We observed that this method not only addressed the patient's goiter but also sustained normal thyroid function for more than five years. The long half-life of ethiodized oil made it an ideal option for patients reliant on parenteral nutrition, who often struggle with iodine deficiency.
This study highlights a promising alternative for individuals facing similar nutritional challenges due to severe digestive issues. Overall, our findings suggest that tailored iodine administration could offer a viable solution for hypothyroidism linked to dietary deficiencies.
We observed that this method not only addressed the patient's goiter but also sustained normal thyroid function for more than five years. The long half-life of ethiodized oil made it an ideal option for patients reliant on parenteral nutrition, who often struggle with iodine deficiency.
This study highlights a promising alternative for individuals facing similar nutritional challenges due to severe digestive issues. Overall, our findings suggest that tailored iodine administration could offer a viable solution for hypothyroidism linked to dietary deficiencies.
Read More
9
We examined a unique case of a 9-year-old boy who developed severe hypothyroidism from iodine deficiency, likely caused by a restrictive diet. In a quick intervention, we administered a kelp supplement, which effectively corrected both his hypothyroidism and iodine deficiency.
This case highlights the potential benefits of using kelp as a natural iodine source, particularly in situations where dietary restrictions may lead to deficiencies. However, this is a singular report, so broader studies are necessary to confirm these findings.
This case highlights the potential benefits of using kelp as a natural iodine source, particularly in situations where dietary restrictions may lead to deficiencies. However, this is a singular report, so broader studies are necessary to confirm these findings.
Read More
9
We explored the impact of daily powdered kelp on thyroid function in seven patients suffering from hypothyroidism due to iodine deficiency. After three years of total enteral nutrition with very low iodine intake, these patients showed significant thyroid issues and very low urinary iodine concentrations.
Administering 1-2 grams of powdered kelp daily led to restored thyroid function and normalized iodine levels in their urine, indicating that kelp can be a safe and effective treatment in this context.
Administering 1-2 grams of powdered kelp daily led to restored thyroid function and normalized iodine levels in their urine, indicating that kelp can be a safe and effective treatment in this context.
Read More
9
We assessed how effective radioactive iodine (RAI) treatment is for inducing hypothyroidism in adolescents with Graves' disease (GD). This treatment is often considered when initial therapies, like antithyroid drugs, do not yield lasting results.
In our examination, we reviewed the medical records of teenagers under 18 years old who received RAI treatment from January 2007 to December 2022. We identified 14 cases and noted their ages ranged from 9.8 to 17.3 years, with I131 doses varying between 5.8 and 15.0 mCi.
Remarkably, almost all patients responded positively within six months after treatment, with a cure rate of 86%. Most experienced hypothyroidism within three months, reinforcing the necessity of monitoring thyroid function early on. We did observe one case of temporary salivary gland inflammation.
Throughout the follow-up period of up to 13 years, there were no relapses, which speaks to the effectiveness and safety of RAI as an option for these young patients with GD.
In our examination, we reviewed the medical records of teenagers under 18 years old who received RAI treatment from January 2007 to December 2022. We identified 14 cases and noted their ages ranged from 9.8 to 17.3 years, with I131 doses varying between 5.8 and 15.0 mCi.
Remarkably, almost all patients responded positively within six months after treatment, with a cure rate of 86%. Most experienced hypothyroidism within three months, reinforcing the necessity of monitoring thyroid function early on. We did observe one case of temporary salivary gland inflammation.
Throughout the follow-up period of up to 13 years, there were no relapses, which speaks to the effectiveness and safety of RAI as an option for these young patients with GD.
Read More
User Reviews
USERS' SCORE
Moderately Good
Based on 6 Reviews
7.3
- All Reviews
- Positive Reviews
- Negative Reviews
0
Avoid iodine supplements
22 people found this helpful
I do not recommend iodine supplements for Hashimoto's/hypothyroidism. After my diagnosis, I believed I needed iodine and thought this product was safe due to its smaller amount of natural iodine. An expert informed me that iodine supplementation is unnecessary and can cause harm in my condition. Many doctors misunderstand thyroid disorders and offer inaccurate traditional advice. Natural iodine can worsen autoimmune diseases by triggering the immune system to further destroy the thyroid, even if one feels initial relief. I stress the importance of proper diagnosis and the dangers of self-medicating with iodine supplements.
Read More
10
Cured my hypothyroidism
6 people found this helpful
A great quality natural iodine source. NOW Foods maintains excellent quality control to ensure this kelp doesn't contain excessive mercury or arsenic, which supports my thyroid's hormone production. Taking this daily has cured my hypothyroidism. One concern is that the lid doesn't seal adequately, so I store my supplements in the fridge to avoid moisture.
Read More
7.5
Natural treatment success
5 people found this helpful
I’m satisfied. Reviewing supplements is challenging since benefits aren’t always obvious. I’ve had hypothyroidism for years and treated it naturally. By meticulously following a strict alkaline diet along with certain daily supplements, I've greatly diminished or eliminated most symptoms and feel much better. After extensive research and consultations with multiple naturopathic doctors, I can say this supplement has positively impacted my regimen. I’m pleased with the quality and value and will repurchase.
Read More
6
Energy challenges
14 people found this helpful
Now my preferred iodine supplement. I have high blood pressure and follow a low-salt diet. After noticing low energy levels until I consumed shrimp, which is high in iodine, I researched iodine solutions. Potassium iodide was effective initially, but I later developed an issue with excess iodine mimicking hypothyroidism symptoms. I discovered I need between 250 to 500mcg of iodine daily, and these tablets fit that requirement perfectly. This large bottle will likely last me eight months.
Read More
9
Effective kelp source
8 people found this helpful
A sure way to get my iodine. I knew kelp was beneficial for iodine. Prior to this, I experienced hypothyroidism. I took one capsule for two consecutive days before my lab test, and my recent results showed hyperthyroidism. It clearly works.
Read More
Frequently Asked Questions
No FAQs are available for this product and symptom.
References
- Mohibbullah M, Bashir KMI, Kim SK, Hong YK, Kim A, et al. Protective effects of a mixed plant extracts derived from Astragalus membranaceus and Laminaria japonica on PTU-induced hypothyroidism and liver damages. J Food Biochem. 2019;43:e12853. 10.1111/jfbc.12853
- Brooks MJ, Post EM. Acquired hypothyroidism due to iodine deficiency in an American child. J Pediatr Endocrinol Metab. 2014;27:1233. 10.1515/jpem-2014-0226
- Takeuchi T, Kamasaki H, Yoto Y, Honjo T, Tsugawa S, et al. Investigation of iodine deficient state and iodine supplementation in patients with severe motor and intellectual disabilities on long-term total enteral nutrition. Endocr J. 2012;59:697.
- Takeuchi T, Kamasaki H, Hotsubo T, Tsutsumi H. Treatment of Hypothyroidism due to Iodine Deficiency Using Daily Powdered Kelp in Patients Receiving Long-term Total Enteral Nutrition. Clin Pediatr Endocrinol. 2011;20:51. 10.1297/cpe.20.51
- Waśniowska J, Piątkowska E, Pawlicki P, Smoleń S, Kopeć A, et al. Comparative Analysis of Iodine Levels, Biochemical Responses, and Thyroid Gene Expression in Rats Fed Diets with Kale Biofortified with 5,7-Diiodo-8-Quinolinol. Int J Mol Sci. 2025;26. 10.3390/ijms26020822
- Cox SE, Wakeling J, Hall T, Williams TL. Survival of radioiodine treated hyperthyroid cats that are euthyroid and hypothyroid after treatment, and effect of levothyroxine supplementation on survival time of cats with iatrogenic hypothyroidism. J Vet Intern Med. 2025;39:e17295. 10.1111/jvim.17295
- He J, Dong Y, Chen X, Wang S, Shen Z, et al. Hypothyroidism induced by excessive-iodine is associated in humans with altered hsa-miR-199a-5p/HIF-1α axis and thyroglobulin. J Nutr Biochem. 2025;138:109841. 10.1016/j.jnutbio.2025.109841
- Seetharaman S, Sasidharan Pillai S, Ganta A, Millington K, Quintos JB, et al. Iodine Deficiency Hypothyroidism Among Children in the United States - 21st Century Resurgence?. AACE Clin Case Rep. 2024;10:236. 10.1016/j.aace.2024.08.003
- Chielens L, Nauwynck E, Bourgeois S, Staels W, Vanbesien J, et al. A Belgian single centre outcome study of radioiodine treatment in adolescents with Graves' disease. Sci Rep. 2024;14:31063. 10.1038/s41598-024-82052-z
- Belaid S, Raghu V, Alissa F, Rudolph J. Long lasting effect of intramuscular iodine injection in the treatment of goiter in an intestinal failure patient with complete entero-colectomy. JPGN Rep. 2024;5:561. 10.1002/jpr3.12117
