Page 1 - Reviews - 21st Century, B-100 Complex, Prolonged Release, 60 Tablets - iHerb
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Customer Ratings & Reviews

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4.7
Based on 4,964 ratings
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738
221
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English
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mamaMoo
Posted on Oct 2, 2023
423
0
0
35
Great!!!
Verified purchase
Finally, I found something amazing. This is a high-quality product with excellent packaging. It has high benefits and nice impact. The price is suitable and is considered one of the lowest in the market. I got free shipping because I ordered a few items in one shipment and the order was delivered in a short amount of time. I really recommend people to buy this product burst.
iHerbCustomer
Posted on Feb 6, 2026
France
61
6
2
12
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 Jul 29, 2025
Hong Kong
140
0
0
2
Verified purchase
High Quality of B Complex,good size,it helps me removes muscke stiffness
iHerbCustomer
Posted on Oct 5, 2024
Philippines
2,107
0
0
51
Verified purchase
Thank you for providing such outstanding supplements! The quality is exceptional, with thoughtfully selected ingredients that offer remarkable health benefits. Your products have made a significant positive impact on my overall well-being. I also appreciate the secure and reliable packaging. Thanks again, iHerb!
iHerb customer
Posted on Dec 19, 2025
Kuwait
15
15
1
0
Good product
Verified purchase
It has a good benefits in my body. I dont feel tired easily in whole day work. I feel good and feel have more energy. Hope you will try this product. Good i discovered it from my friend thank you.
97eacd15-0e76-4944-a799-685a5425be3e
Cali
Gold
Posted on Nov 26, 2025
611
11
6
270
B-100 Complex Prolonged Release Tablets for Daily Energy and Wellness
Verified purchase
I’ve been taking these B-100 complex tablets daily, and the quality of the ingredients is excellent. The size is easy to swallow, and the package keeps them fresh and secure. The recommended serving and frequency are simple to follow. With consistent use, I’ve noticed improved energy levels, better mood, and overall wellness, making them a dependable addition to my daily supplement routine.
Rene
Posted on Nov 24, 2025
Ireland
60
0
2
2
Excellent 21st Century, B-100 Complex, Prolonged Release is a powerful, safe, and high-quality product!
Verified purchase
I'm a regular iHerb customer, and my purchases have always been exceptionally satisfying. The product is excellent in quality and size. I take a one tablet a day as a preventative measure, the package lasts a long time. Our bodies need extra minerals and vitamins. I appreciated the detailed product description and fast delivery. Excellent 21st Century, B-100 Complex, Prolonged Release is a powerful, safe, and high-quality product!
iHerb customer
Posted on Oct 5, 2025
Saudi Arabia
53
0
0
5
Nervous system support.😍
Verified purchase
It really helpful for those who is suffering from migraines,headaches,tingling and electric shocks.i am also the person who is suffering from migraines,headache,thingling and electric shock,this is really helpful for me i take it along with magnesium glycinate and result is awesome,this and magnesium decrease my migraines to 5 percent only,quality is really great,ingredients is awesome.
PunwareeN
Posted on Sep 1, 2025
Thailand
71
0
0
10
Complete B-Complex for All-Day Energy
Verified purchase
21st Century B-100 Complex is an excellent choice for anyone wanting a full spectrum of B vitamins in one tablet. The prolonged release formula keeps energy levels steady throughout the day without sudden peaks or crashes. I’ve noticed better focus, metabolism support, and reduced fatigue since taking it. It also helps with stress management and overall wellness.
Tatiana
Gold
Posted on Aug 16, 2025
Ukraine
485
0
0
23
Powerful B-Complex for Sustained Energy
Verified purchase
I'm thoroughly impressed with 21st Century B-100 Complex! The high quality formula contains optimal doses of essential B vitamins, including folic acid, in a convenient timed-release tablet. The ingredients provide excellent support for energy, metabolism, and nervous system function. While the tablets are slightly large (size), they're easy to swallow and the delayed-release formula minimizes any niacin flush. I've noticed a significant effect on my stamina and focus since starting this supplement. The potency is perfect - just one tablet daily delivers comprehensive benefits.