Life Extension Sea-Iodine

3 people found this helpful

Pelvic Pain details

I resolved issues with muscle pain in my child's limbs after giving this iodine. Initially suspected magnesium deficiency, but after a week of iodine, my child stopped complaining about pain. Very pleased with the results for my 5-year-old.

Cancer details

Iodine treatment aids recurrent cancer

Possibly Effective

Based on 16 Researches

Lazrek A, Finocchi Ghersi S, Petre A, Houabes S, Serre AA, et al. Case report of the first use of a hydrogel rectal spacer for prostate cancer reirradiation via LDR brachytherapy: applications and technical notes. Front Oncol. 2025;15:1494304. doi:10.3389/fonc.2025.1494304

We observed a compelling case where a biodegradable hydrogel spacer was used alongside iodine-125 brachytherapy to treat recurrent prostate cancer. This innovative approach involved placing the spacer to create space between the prostate and the rectum, which significantly reduced radiation exposure to healthy tissues during the treatment.

Following initial external beam radiotherapy in 2015, the patient showed signs of local recurrence by 2022. To address this, the treatment plan included not just the iodine-125 brachytherapy but also the hydrogel spacer, which was placed in January 2024 just before the radiation treatment. Six months later, we noted a remarkable drop in the patient’s prostate-specific antigen (PSA) levels, indicating a positive response to the treatment.

This case showcases the potential benefits of using iodine treatment in combination with advanced techniques like hydrogel spacers. The results suggest that this method not only improves the effectiveness of therapy but also ensures higher safety by protecting adjacent tissues from unnecessary radiation damage. Overall, we find this integration of technology highly beneficial for managing recurrent cancer challenges.

Symptom improvement

Most Useful Review

51 people found this helpful

After experiencing neck swelling and other discomforts for four months, I turned to iodine supplements. Within two days, my symptoms improved significantly, and my swelling has almost completely subsided.

Updated: Apr 2025

Abscess details

47 people found this helpful

After living with hypothyroidism and thyroid cysts for over a decade, I followed my endocrinologist's advice to start taking iodine. Initially, there was no result until I discovered this remarkable product! I take 1-2 capsules daily, and the outcome is excellent—stronger nails, reduced hair fall, and significantly shrinkage of thyroid cysts. I highly recommend this, but consult specialists first.

74 people found this helpful

Back Pain details

I follow my endocrinologist's advice to take this iodine. It has been effective; I feel good without any side effects. My health assessments have returned to normal, and I can easily swallow the small capsules. I recommend this product for anyone facing thyroid issues.

Breast Cancer details

Fucoidan's effects on breast cancer

Possibly Effective

Based on 15 Researches

Banafa AM, Roshan S, Liu YY, Chen HJ, Chen MJ, et al. Fucoidan induces G1 phase arrest and apoptosis through caspases-dependent pathway and ROS induction in human breast cancer MCF-7 cells. J Huazhong Univ Sci Technolog Med Sci. 2013;33:717. doi:10.1007/s11596-013-1186-8

We examined the effects of Fucoidan, a component from seaweed, on human breast cancer cells known as MCF-7. Our findings showed that Fucoidan significantly reduced the number of viable cancer cells in a dose-dependent way.

It led to G1 phase cell cycle arrest and increased apoptosis, which is the process of programmed cell death. These changes involved various molecular mechanisms, including the regulation of specific genes and increased production of reactive oxygen species.

Overall, our study suggests that Fucoidan has potential as a treatment for breast cancer through its ability to halt cell growth and promote cancer cell death.

Helped breast condition

Most Useful Review

This iodine supplement has helped significantly with my fibrocystic breasts. I ordered it years ago and experienced a great improvement. It has no taste and I find it very good quality.

Updated: Mar 2026

Cardiovascular Disease details

Eases anxiety quickly

2 people found this helpful

I resolved my iodine deficiency through daily use of these supplements. They worked well for me, alleviating symptoms like anxiety and tenderness. I noticed a significant decrease in anxiety within hours of taking a pill, and after a month, I felt completely normal. Unlike other higher dosage iodine supplements, this dosage is gentle and effective without causing drowsiness.

8 people found this helpful

Ear Infection details

Excellent! Iodine in an effective dose is crucial for immunity, thyroid function, and enhancing one’s mood. My overall well-being has significantly improved; I now appreciate waking up early without feeling fatigued throughout the day. I highly recommend a course of iodine, whichever you opt for, to bolster health, mood, and immunity, especially in these challenging times!

Headache details

Less frequent headaches

14 people found this helpful

Budget-friendly with good results. I noticed a marked improvement in my health; my mind felt clearer, without fogginess or drowsiness during the day. I wake up feeling refreshed and energetic. Without iodine, I tend to feel tired in the mornings and struggle to motivate myself. My headaches have become less frequent; without iodine, I would have migraines. I am very satisfied and highly recommend this supplement.

Effective thyroid treatment

Low Libido details

2 people found this helpful

This iodine really raises the libido! As someone who is hypotonic, I try to address my body's deficiencies with nutraceuticals. I’ve been impressed by this iodine; there's been no side effects, and the higher dosage suits my needs perfectly. I noticed an increase in libido after just two weeks of taking it—the thyroid gland is happy and recovering! If you found this review helpful, please click “yes”.

430 people found this helpful

Sleep Apnea details

The tests on my thyroid gland are normal, but I often feel like I have hypothyroidism; I wake up feeling tired despite getting enough sleep. However, after a week of taking the supplement, I noticed a remarkable improvement. The brain fog disappeared, and I now wake up feeling energised every morning. It's a wonderful transformation.

Resolves deficiency symptoms

Cold details

9 people found this helpful

If you're experiencing deficiency symptoms, take a pill daily until the bottle is empty. I realised I had an iodine deficiency around 50, likely due to avoiding table salt. I experienced hair loss, bloating, and a lower core temperature, often feeling cold. After one bottle, my symptoms resolved, and I'm delighted with the results. Just be careful not to overdose on iodine.

Supports overall wellbeing

Celiac details

Iodine is a vital mineral for the thyroid gland, which regulates metabolism and energy. Life Extension Sea-Iodine offers a natural source of iodine from sea vegetables like kelp and bladderwrack. Each vegetarian capsule contains 1,000 mcg of iodine, supporting thyroid health and overall wellbeing. This supplement is free from allergens like gluten, soy, and dairy, making it suitable for many. Users have noted improved thyroid function, increased energy, and enhanced cognitive abilities. The convenience of taking a capsule makes it user-friendly, as it doesn’t require mixing or measuring. I highly recommend this iodine supplement for anyone seeking quality ingredients to support their health, especially for those deficient in iodine.

Heart Disease details

Fucoidan mitigates chemotherapy heart damage

Questionable

Based on 2 Researches

Zhang J, Sun Z, Lin N, Lu W, Huang X, et al. Fucoidan from Fucus vesiculosus attenuates doxorubicin-induced acute cardiotoxicity by regulating JAK2/STAT3-mediated apoptosis and autophagy. Biomed Pharmacother. 2020;130:110534. doi:10.1016/j.biopha.2020.110534

We examined how fucoidan, a natural compound found in kelp, might help reduce heart damage caused by the chemotherapy drug doxorubicin (DOX). Using Sprague-Dawley rats and heart cells in a lab, we found that DOX causes significant heart damage, but fucoidan has a protective effect. It works by enhancing the process of cell repair and reducing cell death through the JAK2/STAT3 signaling pathway. These promising findings suggest that fucoidan could be a potential therapeutic option to mitigate heart-related side effects of chemotherapy.

Visible hair and nail improvement

Most Useful Review

8 people found this helpful

What a difference! This supplement made a more substantial impact than anything I’ve tried before. After undergoing thyroid treatment for Graves' disease 22 years ago and taking whole thyroid supplements, I found that iodine made a tangible difference. My nails are stronger again, and I no longer deal with oily hair.

Updated: Mar 2026

Prostate Cancer details

4 people found this helpful

Adding iodine, along with vitamin D3, can significantly improve one's wellbeing. Iodine aids in revitalising the thyroid and combats the negative effects of exposure to radon and other natural radiation. This supplement is particularly beneficial if there is a family history of issues like breast or prostate cancer. I appreciate that LifeExtension has been trusted by health professionals for many years.

Reduced nodules significantly

Heart Attack details

55 people found this helpful

About a year ago, I had an ultrasound that revealed two nodules on my thyroid. After consulting an endocrinologist, I began taking iodine. I chose this particular brand due to its positive reviews and pure composition. Six months later, a follow-up ultrasound showed considerable shrinkage of the nodules! This dietary supplement is excellent, and I intend to use it regularly. I am grateful to iHerb for such quality supplements. Health to everyone!

1 people found this helpful

Premenstrual Syndrome details

I drank this before without tracking it. I decided to repeat the course, and what I noticed is remarkable: I no longer suffer from premenstrual syndrome (PMS), and the discomfort in my chest during the second half of my cycle has disappeared.

51 people found this helpful

Uterine Fibroids details

I reside in Kazakhstan, an area endemic for iodine deficiency. Following my doctor's recommendation, I take these capsules as they are comfortable and have no unpleasant odour. After using two packs, I’ve noted improvements based on my ultrasound, as it’s believed that Uterine Fibroids can develop with iodine deficiency.

The product features a great composition, fast delivery, and high-quality packaging. Although the capsules are slightly large, I have no trouble swallowing them. I feel rejuvenated after taking it for 10 days, noticing fewer headaches and increased energy. This is also perfect for those into fitness or dieting, as omega 3 aids in optimal body function.

Nausea details

Fucoidan shows potential bioactivity

Brain Tumor details

Cabral EM, Mondala JRM, Oliveira M, Przyborska J, Fitzpatrick S, et al. Influence of molecular weight fractionation on the antimicrobial and anticancer properties of a fucoidan rich-extract from the macroalgae Fucus vesiculosus. Int J Biol Macromol. 2021;186:994. doi:10.1016/j.ijbiomac.2021.06.182

We explored the antimicrobial and anticancer properties of a fucoidan extract derived from the macroalgae Fucus vesiculosus. This study involved testing various fractions of the extract against bacterial strains and brain glioblastoma cancer cells.

The results showed that the larger fractions (>300 kDa) displayed the most significant cytotoxic effects on the cancer cells over time. While the study confirmed the potential of this extract as an antimicrobial and anticancer agent, further research is necessary to uncover the exact mechanisms behind its effects.

Memory clarity restored

Most Useful Review

I appreciated the effect on stabilising my brain activity. After suffering from memory issues post-COVID, this iodine helped restore my clarity and alleviated my forgetfulness.

Updated: Mar 2026

Chronic Fatigue Syndrome details

9 people found this helpful

This iodine is a favourite in our family! I take it daily, along with my husband and parents. Since starting, I have remained cheerful and free from fatigue. This iodine is a vital nutrient for everyone, with significant improvements in memory and skin appearance.

Improved symptoms significantly

Cold Sores details

1 people found this helpful

After struggling with hypothyroidism and low blood pressure, I turned to Life Extension's Sea-Iodine. Their supplements are consistently high-quality, which gave me confidence. I take it weekly, and it has substantially eased my symptoms. I used to feel cold, tired, and weak, but within days of using it, I no longer feel cold. It has also boosted my energy and concentration, making it a vital supplement for managing my hypothyroidism.

Food Poisoning details

Normalised thyroid size

3 people found this helpful

In October 2019, my thyroid gland was much smaller than normal, and I was on the verge of hypothyroidism. My TSH levels were slightly above normal, prompting me to incorporate iodine-rich foods. I initially took 150 mcg of iodine, then increased it to 200 mcg with selenium. After intermittent use for a year, my thyroid's size normalised, confirmed by ultrasound in November 2020, and I feel good.

High Cholesterol details

Sugar kelp aids liver health

Moderately Effective

Based on 2 Researches

Kim MB, Lee Y, Bae M, Kang H, Hu S, et al. Sugar kelp (Saccharina latissima) inhibits hepatic inflammation and fibrosis in a mouse model of diet-induced nonalcoholic steatohepatitis. J Nutr Biochem. 2021;97:108799. doi:10.1016/j.jnutbio.2021.108799

We examined how U.S.-grown sugar kelp, a type of edible brown seaweed, might help combat liver problems associated with obesity in mice. Mice were given a diet high in fats and sugars, with one group also receiving sugar kelp.

Remarkably, those eating sugar kelp showed less weight gain and reduced levels of harmful cholesterol and fats in their liver. They also experienced less liver inflammation and fibrosis compared to those on the higher-fat diet without kelp.

These findings suggest that sugar kelp could be a beneficial addition to diets aimed at reducing health issues related to obesity.

Normalised TSH levels

Most Useful Review

9 people found this helpful

This product worked wonders for my hypothyroidism. My TSH levels normalised, and I now have much more energy. It’s very effective for me!

Updated: Mar 2026

Adenoiditis details

Benefits for breastfeeding

As a breastfeeding mother, I initially hesitated to take iodine, but after ensuring my dosage was safe, I took one capsule daily without side effects. In fact, I noticed improvements not just in myself but also in my son—his stool improved, and he began articulating syllables more clearly. Normally, I suffer from coughs in spring, yet this time I experienced no sore throats or coughing.

Hypothyroidism details