Page 1 - Reviews - 21st Century, Selenium, 200 mcg, 60 Capsules - iHerb
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4.8
Based on 11,072 ratings
9,297
1,152
450
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What customers say
Customers highly praise this selenium supplement for its effectiveness in improving overall health, mood, energy levels, and immune support. Many users report noticeable improvements in well-being and specific conditions like hypothyroidism and Hashimoto's. The product is appreciated for its high quality, reasonable price, easy-to-swallow packaging, and fast shipping. Users find it beneficial for maintaining good health without side effects and recommend it for its excellent value.
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iHerbCustomer
Posted on Feb 6, 2026
France
61
6
2
13
Прекрасно!
Verified purchase
Quality is super! The ingredients are great! Size arranged! What you need! Performance is felt! the product arranged, perfectly packed, the effect is definitely there! I will order more! Just as quickly delivered
iHerbCustomer
Silver
Posted on Apr 8, 2026
Spain
244
0
0
9
Verified purchase
High-quality selenium supplement! The 200 mcg capsules are easy to take and provide excellent support for immunity and overall wellness. I’ve noticed better energy and well-being since using them consistently. Reliable, effective, and great value—highly recommend
iHerb customer
Posted on Nov 10, 2025
United States
59
0
0
6
Verified purchase
The 21st Century product "Selenium & ACE Mega Potency Antioxidants" is best for protecting the body from free radicals and slowing the aging process by combining selenium with vitamins A, C, and E. As a supplement, selenium is also best for supporting thyroid function, immune response, and antioxidant defense, along with playing roles in male fertility and cardiovascular health.
march071979
Posted on Mar 10, 2026
Philippines
40
0
0
0
Verified purchase
ingredients is made up of quality minerals. this supplement helps our immune system to boost.
iHerb customer
Posted on Nov 22, 2024
United States
6
6
0
1
slenium
Verified purchase
good quality it's ingredient contains selenium supplement good size 60 capsule in one package it's benefits .. good composition it contains minerals , strong anti oxident , good for fertility and supplement for those who go through diet and may suffer selenium deficiency, relief tiredness symptoms frequency of take is 1 tabs per day no bad taste I like it
cabb32ab-7f07-4b02-9910-248d42fab5f0
iHerb customer
Posted on Nov 11, 2025
Korea, Republic of
12
0
0
0
최고!
Verified purchase
Quality is super! The ingredients are great! Size arranged! What you need! Performance is felt! the product arranged, perfectly packed, the effect is definitely there! I will order more! Just as quickly delivered
iHerb customer
Silver
Posted on Nov 5, 2025
United Arab Emirates
100
0
1
1
Verified purchase
Selenium's benefits include acting as a powerful antioxidant to protect cells, supporting thyroid function by helping to regulate hormones, and boosting the immune system to fight off infection.
iHerb customer
Posted on Nov 1, 2025
Singapore
41
0
0
0
Прекрасно!
Verified purchase
Super product, I will definitely order it again, I recommend it to everyone, the packaging is of high quality, and the ingredients are excellent. Fast delivery, everything arrived in good condition and was well packaged !!!
iHerbCustomer
Posted on Oct 3, 2025
Oman
89
0
0
1
Verified purchase
Very good ingredient quality is fair, easy to use as mineral supplement , good size, and beautiful package, makes my hair soft and makes it moisture
iHerb customer
Posted on Oct 2, 2025
Saudi Arabia
70
0
0
0
Verified purchase
Here’s a concise review of 21st Century Selenium 200 mcg Capsules, covering all your requested points: 🌿 21st Century Selenium 200 mcg – 60 Capsules This supplement provides 200 mcg of selenium per capsule, an essential trace mineral known for its antioxidant properties and role in supporting immune and thyroid health. ✅ Benefits Antioxidant Support: Selenium acts as a powerful antioxidant, helping to protect cells from oxidative damage. Immune Function: Supports a healthy immune system. Thyroid Health: Plays a crucial role in thyroid hormone metabolism. Cognitive Function: May contribute to cognitive health and reduce the risk of cognitive decline. 🧪 Deficiency Selenium deficiency can lead to various health issues, including weakened immune function, thyroid dysfunction, and increased oxidative stress. Supplementing with selenium can help restore optimal levels and support overall health. 📦 Package & Size Quantity: 60 capsules per bottle Packaging: Plastic bottle with a secure cap 💊 Dosage & Frequency Recommended Dosage: Take one (1) capsule daily with any meal or as directed by a healthcare provider. Frequency: Daily, as part of a balanced diet 🌞 Sun Considerations Selenium is not synthesized by the body through sun exposure; therefore, supplementation is necessary to obtain adequate levels. 🧾 Ingredients Active Ingredient: Selenium (as selenium yeast) Other Ingredients: Gelatin, Glycerin, Purified Water, Mixed Tocopherols, Sodium Alginate, Stearic Acid, Ethylcellulose, Medium Chain Triglycerides, Ammonium Hydroxide, Oleic Acid, Vanillin 🏭 Quality Manufactured in a cGMP-certified facility, ensuring high-quality standards. The capsules are free from gluten, yeast, preservatives, and artificial flavors. 👅 Taste The capsules are tasteless and easy to swallow. 🛒 Where to Buy Amazon iHerb Walmart Nahdi ⚠️ Considerations Storage: Store in a cool, dry place away from direct sunlight. Consultation: Consult with a healthcare professional before starting any new supplement, especially if pregnant, nursing, or on medication. Summary: The 21st Century Selenium 200 mcg Capsules offer a convenient and affordable way to support antioxidant activity, immune function, and thyroid health. With a daily dosage of one capsule, it's an easy addition to your wellness routine. Manufactured in a cGMP-certified facility, it ensures quality and purity. If you need a concise, copy-paste-ready version for quick reference or comparison with other supplements, feel free to ask!