Customer Ratings & Reviews

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4.8

Based on 669 ratings

561

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What customers say

(245)

iHerb Customer

Silver

Posted on 21/03/2026

Nigeria

168

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

146

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.

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Dima

Gold

Posted on 19/01/2026

Jordan

962

377

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. 🌹

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kitty

Posted on 1/09/2025

Spain

Excellent

Verified Purchase

I really liked 21st Century's Vitamin B1. The price was great, and it arrived quickly. After a few weeks of taking it, I noticed more energy and less fatigue. The tablets are small and easy to swallow, which helps a lot. It's just important not to take them with niacin, as it can cause flushing (that hot, red skin sensation). Overall, I think the quality is very good for the price, and I recommend it. Best regards.

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Viktoria

Posted on 21/11/2025

Ukraine

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.

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iHerb Customer

Silver

Posted on 29/09/2025

Kazakhstan

145

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.

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iHerbCustomer

Gold

Posted on 15/08/2026

China

671

130

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

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.

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Wilneidith

Silver

Posted on 28/04/2026

Colombia

293

Excellent

Verified Purchase

Excellent product of very good quality and size, ideal effect and packaging

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march071979

Posted on 10/03/2026

Philippines

Verified Purchase

the quality is good. it gives energy and good for the nervous system

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Customer Ratings & Reviews

What customers say

(245)

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