Page 2 - Reviews - Swanson Vitamins, Thyroid Essentials, 90 Capsules - iHerb
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Customer Ratings & Reviews

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4.7
Based on 700 ratings
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What customers say
(162)
 
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iHerbSuperUser
Gold
Posted on 23/12/2025
Kazakhstan
2,262
0
0
215
Verified Purchase
A good thyroid supplement. The recommendations called for L-tyrosine, iodine, and group B supplements. I'm very glad this complex includes everything and doesn't require taking them separately.
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iHerb Customer
Posted on 9/08/2026
Jordan
25
12
0
0
Thyroid gland basics
Verified Purchase
This product is excellent. It's a great thyroid-supporting supplement. The quality is very good compared to the price. The ingredients are natural, and the quantity lasts for months. The protein content is neatly packaged. The benefits are well-known. The formula is natural, the taste is pleasant, and it's excellent for muscle building, dieting, and training.
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kamarik92
Gold
Posted on 22/12/2025
Kazakhstan
332
8
0
11
Verified Purchase
I liked the quality of the product! The price is reasonable! I trust this company's ingredients. The packaging arrived intact and sealed. I believe the product is beneficial! I was very pleased with the dosage.
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iHerb Customer
Gold
Posted on 7/11/2025
Ukraine
312
9
0
67
Thyroid support
Verified Purchase
Such a supplement can help in cases where there is a deficiency of certain minerals or vitamins that are necessary for the normal functioning of the thyroid gland: • Support for the production of thyroid hormones (iodine, tyrosine) • Assistance in the conversion of hormones (e.g. selenium) • Support for general metabolism and the nervous system (B vitamins, zinc) • Support during increased stress, when the thyroid gland can work "at the limit"
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BACK-DOOR
Gold
Posted on 19/10/2025
United Arab Emirates
689
0
0
73
Verified Purchase
Excellent Quality, Fast Delivery & Perfect Packaging! I’m extremely satisfied with this product from iHerb! The quality is absolutely amazing — you can really feel the difference compared to other brands. The packaging was neat, safe, and well-sealed, ensuring the product arrived in perfect condition. Shipping was super fast and reliable, even faster than I expected! Everything came fresh, authentic, and exactly as described on the website. I also appreciate how iHerb always delivers genuine products with great expiration dates and professional packaging. Highly recommend this item to anyone looking for top quality, great value, and trusted delivery service. I’ll definitely order again soon!
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iHerb Customer
Silver
Posted on 15/10/2025
Ukraine
118
0
0
9
Excellent quality
Verified Purchase
A beneficial complex for maintaining thyroid health and supporting a healthy nervous system. This supplement provides complete thyroid nutrition thanks to the natural ingredient tropical mint, a beneficial herb. It also contains zinc, copper, iodine, and B vitamins for support. I take 1 capsule twice daily with meals and feel energized throughout the day. The packaging is large.
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iHerbCustomer
Posted on 12/11/2025
South Korea
93
3
1
7
Actually, my thyroid is not good.
Verified Purchase
I actually had hypothyroidism, and this is one of the nutritional supplements I've been taking consistently since I recovered to help manage it. At first, I took the iodine, choline, and seaweed separately, but I think this alone is more or less enough, so I've been taking it alone. The size of the pill and the swallowing are fine. The ingredients seem to be good.
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iHerbCustomer
Gold
Posted on 17/10/2025
Ukraine
695
0
0
98
Verified Purchase
The supplement contains nutrients such as iodine and tyrosine, which are necessary for the maintenance of the thyroid gland. These components help in the production of thyroid hormones, which regulate metabolism, cell growth and nervous system function. The main active ingredients required for the synthesis of thyroid hormones. Thyroid hormones play a key role in the regulation of metabolism. Thyroid hormones are important for the growth and reproduction of cells. The supplement supports the normal functioning of the nervous system. The complex is designed to provide optimal nutrition to the thyroid gland with the help of specialized ingredients.
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Asmaa20rs
Gold
Posted on 7/11/2025
Saudi Arabia
399
0
7
197
Verified Purchase
The quality is excellent, and its ingredients include various vitamins that support the thyroid gland. Its effectiveness and benefits are excellent. I took it along with a nutritional program and diet, and it was very beneficial, praise be to God.
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iHerb Customer
Silver
Posted on 16/10/2025
Ukraine
101
0
1
15
Thyroid
Verified Purchase
The thyroid gland needs not only iodine for normal functioning, but also cofactors - that is, vitamins and trace elements, without which the hormones T3 and T4 cannot be formed or work properly. ✅ The main cofactors for the thyroid gland: Selenium (Se) Necessary for the conversion of T4 → active T3. Protects gland cells from oxidative stress. Recommended for autoimmune thyroiditis (Hashimoto). 💊 Dose: 100–200 mcg/day. Zinc (Zn) Participates in the synthesis of thyroid hormones. Supports immunity and skin in hypothyroidism. 💊 Dose: 15–30 mg/day. Iodine (I) The main building material for T3 and T4. It is important not to exceed the dose, especially in autoimmune processes. 💊 Dose: 100–200 mcg/day (depending on need). Iron (Fe) Without it, the enzyme thyroperoxidase (TPO) cannot work. Iron deficiency → inhibits the production of thyroid hormones. 💊 Dose: individually, after ferritin analysis (optimum 60–100 ng/ml). Magnesium (Mg) Necessary for the activation of enzymes in the thyroid gland. Helps with fatigue, irritability, spasms. 💊 Dose: 200–400 mg/day (better — glycinate or citrate). Vitamin D3 Supports immune balance, especially in autoimmune processes. Optimal blood level: 50–80 ng/ml. B vitamins (especially B2, B3, B6, B12) Help in the synthesis of thyroid hormones. Support the nervous system and energy. Vitamin A (retinol) Necessary for the conversion of T4 → T3. Especially important for dry skin, hair loss and poor vision. ⚠️ Important: Excess iodine without selenium can worsen the condition of Hashimoto's. It is best to take it comprehensively, in the form of a thyroid support program (for example: iodine + selenium + zinc + magnesium + D3 + B-complex). It is always good to do tests before starting: TSH, fT4, fT3, AT-TPO, ferritin, vitamin D. Quality, size and ingredients are at the height
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