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

100% authenticOur products are sourced directly from brands or authorized distributors.Show more
4.7
Based on 4,989 ratings
3,943
742
222
43
39
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What customers say
Customers are highly satisfied with the 'B-100 Complex, Prolonged Release, 60 Tablets' due to its excellent quality and effectiveness. Many users report significant improvements in energy levels, reduced fatigue, and overall better health. The tablets are easy to swallow and have no special taste. Some customers noticed a change in urine color to yellow, indicating strong vitamin concentration. The product is praised for its comprehensive blend of B vitamins that support metabolism, nervous system function, and stress reduction. The prolonged release formula is appreciated by some but questioned by others regarding its effectiveness. Overall, the product is considered affordable with good packaging and delivery service.
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English
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AbouAssaad
Gold
Posted on Nov 21, 2024
United Arab Emirates
621
0
1
9
Verified purchase
Amazing product, ordered it before and saw some great improvements
iHerb customer
Posted on Nov 27, 2025
United Arab Emirates
17
0
0
0
Very very nice llove quailty and size and packaging and taste … Very very nice llove quailty and size and packaging and taste … Very very nice llove q
Verified purchase
Very very nice llove quailty and size and packaging and taste … Very very nice llove quailty and size and packaging and taste … Very very nice llove quailty and size and packaging and taste …
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
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
Posted on Oct 5, 2024
Philippines
2,107
0
0
60
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
2
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
276
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
67
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
76
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.