Page 1 - Reviews - 21st Century, B-1, 110 Tablets - iHerb
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B-1, 110 Tablets
B-1, 110 Tablets

Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorised distributors.Show more
4.8
Based on 687 ratings
578
77
21
6
5
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What customers say
Customer reviews (257)
Product reviews solely reflect the views and opinions expressed by the contributors and not those of iHerb. iHerb does not verify or endorse any claims made in these reviews. Statements regarding food supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.
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Rating

Rating

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English (UK)
Languages
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Reviews from Australia
Reviewer's country
English (UK)
Translated reviews
NickyB
Posted on 2/06/2026
Australia
10
0
0
2
B1's really work!
Verified Purchase
This brand 21st Century B1's really work! My blood work always shows up great when I am consistently taking them. Purchased several times now.
Auto-translated from English
MayaMedicina
Posted on 17/09/2026
Canada
9
0
0
1
I highly recommend it.
Verified Purchase
Vitamin B1 (thiamine) seems like a very interesting supplement to me, especially because of its role in energy metabolism and the proper functioning of the nervous system. It helps the body convert food into energy and contributes to the normal functioning of the heart and nervous system. I would recommend it particularly when there is insufficient intake or an increased need, always keeping in mind that it does not replace a balanced diet.
Auto-translated from Spanish
iHerb Customer
Silver
Posted on 21/03/2026
Nigeria
168
36
0
11
good one
Verified Purchase
I’m really impressed with the quality of this supplement. The ingredients are clean and well-selected, which makes me feel confident about what I’m putting into my body. The potency is noticeable, and I started seeing good results after consistent use. The taste is also quite pleasant, making it easy to take daily without discomfort
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iHerbCustomer
Silver
Posted on 14/03/2026
Jordan
163
0
2
47
Excellent
Verified Purchase
As a pharmacist, I recommend it to my customers at the pharmacy. The quality is excellent, the ingredients are very safe, and the quantity is sufficient.
Auto-translated from Arabic
Dima
Gold
Posted on 19/01/2026
Jordan
975
15
4
395
Verified Purchase
I will update after a while of using it. I bought it based on user reviews. Please like this post, may God bless us all. 🌹
Auto-translated from Arabic
Viktoria
Posted on 21/11/2025
Ukraine
24
1
0
0
Class!
Verified Purchase
Vitamin B1 has proven to be very helpful in maintaining energy and concentration. After a few weeks of taking it, I noticed that I recover from fatigue faster. Irritability has also decreased and my mood has improved. It is nice that it is easily absorbed and does not cause discomfort. Overall, I am satisfied with the results and will continue to take it.
Auto-translated from Ukrainian
iHerb Customer
Silver
Posted on 29/09/2025
Kazakhstan
145
0
0
23
super
Verified Purchase
I purchased 21st Century Vitamin B-1 100 mg (110 tablets) and was very pleased with the product. The packaging is neat, the lid closes tightly, and the tablets are small and easy to take daily. The manufacturer has a proven track record for the quality of its supplements, which inspires confidence. After taking it regularly, I noticed increased energy, improved concentration, and an overall sense of well-being. Vitamin B-1 supports the nervous system, helps manage stress, and is involved in metabolism. The effects are gentle and without side effects. One package lasts for a long course, making it a practical and cost-effective purchase. One tablet per day is enough to meet your daily vitamin needs. I consider 21st Century Vitamin B-1 an excellent choice for those looking to support their nervous system, energy levels, and overall health. I plan to order it again and can confidently recommend it to others.
Auto-translated from Russian
iHerbCustomer
Gold
Posted on 15/08/2026
China
680
130
3
12
Verified Purchase
It's very helpful for nerve repair; if you take this every day after an injury, the nerve pain won't be as bad.
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B-VitalcomBlaibermsl
Posted on 15/06/2026
Colombia
26
0
0
0
B-1
Verified Purchase
This brand is very good, excellent and of good quality, improving the nervous system and helping a lot with glucose control.
Auto-translated from Spanish
Wilneidith
Silver
Posted on 28/04/2026
Colombia
293
0
0
1
Excellent
Verified Purchase
Excellent product of very good quality and size, ideal effect and packaging
Auto-translated from Spanish