Page 1 - Reviews - 21st Century, Biotin, 360 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 47,651 ratings
38,618
6,018
2,224
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307
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What customers say
Customers are highly satisfied with the biotin supplement, praising its high quality and effective results. Many users have noticed significant improvements in hair strength, reduced hair fall, shinier hair, healthier skin, and stronger nails. The small tablet size is appreciated for being easy to swallow, and the packaging is frequently described as convenient and stylish. The product's ingredients are considered high-quality and suitable for all age groups. Users also find it to be a good value for money due to its effectiveness and the large quantity per bottle. Overall, customers recommend this supplement for its numerous health benefits.
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iHerb customer
Posted on Nov 14, 2023
Cambodia
166
1
1
3
Biotin
Verified purchase
10000 mcg of biotin a day, one a day. No more hair fall, my hair now is so healthy and strong
iHerb customer
Posted on Jan 19, 2022
Cambodia
18
0
0
0
Verified purchase
I love the product so much
Jory
Posted on Mar 5, 2026
Saudi Arabia
57
39
1
3
Biotin
Verified purchase
Biotin is known to support healthy hair and nails. I started taking it regularly as part of my routine. After some time, I noticed my nails became stronger. It is easy to take and fits well into my diet. Overall, it is a useful supplement for beauty support. Good size and packed good for hair nails
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Nuzuray
Silver
Posted on Jan 15, 2026
Saudi Arabia
118
85
1
128
biotin
Verified purchase
I have used this for 3 months now. I see the benefits of it in my hair and skin.. The package was good. Seems like a good quality ingredients. Size is good for 2 months. It has no taste. I have noticed improvements in my hair strength and nails. supports many parts of your body, including your nervous system, liver, eyes, hair, and skin. It helps the enzymes in your body carry out their jobs and keeps cells working as they should.
159f05a6-5bb6-4e02-b502-5aa013f05521
TomnTinz
Posted on Feb 26, 2026
Korea, Republic of
84
344
0
34
Still waiting for results
Verified purchase
My husband and I have been taking this supplement for a few days, but so far we haven't seen any changes. My hair is still falling out, and my skin is still rough, even though this supplement has benefits for the skin, right? If there are any further changes, I will update you regarding the quality, results, or reactions I've experienced with this supplement.
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839c21f1-015f-4a45-82b2-1d1e385b3431
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Cassy
Gold
Posted on Dec 30, 2025
385
7
0
213
High-Potency Biotin for Hair, Skin & Nails
Verified purchase
The 21st Century Biotin 10,000 mcg tablets are excellent in quality with a clean and reliable ingredient profile. The package of 120 tablets provides a long-lasting supply for daily use. Each serving is easy to take, and the high potency supports hair growth, stronger nails, and healthier skin. With consistent frequency, I’ve noticed real benefits and visible improvement in hair thickness and nail strength. The tablets are easy to swallow and gentle on the stomach. Highly recommend for anyone looking for an effective biotin supplement.
KrisBKK
Posted on Oct 28, 2025
Thailand
81
3
16
164
Great for Hair, Skin & Nails!
Verified purchase
21st Century Biotin 10,000 mcg is a fantastic supplement — high potency and great value with 360 tablets! The small tablets are easy to take daily, and after a few weeks, my hair feels stronger, nails grow faster, and skin looks healthier. Perfect for anyone wanting a simple beauty boost from the inside out!
CristianeAraujo
Silver
Posted on Apr 14, 2026
129
0
1
7
Verified purchase
Excellent supplement for hair, skin, and nails. After about a month, I noticed stronger nails and less hair shedding. The tablets are easy to take and the price is very affordable. A great addition to my daily routine.
Antonio
Silver
Posted on Apr 6, 2026
Australia
188
1
10
266
Mega Dose!
Verified purchase
For the price, the quality is quite surprising. The main ingredient is a high-potency 10,000 mcg dose, which is a major benefit for anyone looking to strengthen their hair and nails. I noticed a visible improvement in nail thickness after a few weeks, and the brightening effect on my overall complexion was a nice bonus. The package comes with 120 small tablets, so the size of the bottle is very compact and easy to store. One benefit is that the tablets themselves are tiny and easy to swallow compared to large capsules. It's a straightforward, effective supplement that delivers exactly what it promises without any unnecessary bells and whistles
EnasIsBatman
Posted on Dec 31, 2025
Saudi Arabia
21
3
1
3
Nice!!
Verified purchase
The pills are really tiny so they're so easy to swallow, it did help out with my hair and nails as I've been having less hair falling out and less nails being chipped, package is tiny and easy to store too