Customer Ratings & Reviews

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4.6

Based on 77,160 ratings

59,531

10,640

4,882

1,234

873

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What customers say

(3,882)

Dimi

Silver

Posted on 2/10/2025

Australia

156

great stuff

Verified Purchase

I've been incorporating this supplement into my daily routine for about a month now, primarily to address perceived gaps in my diet, and I've had a generally positive experience. The product is well-regarded, often cited by experts for its high-quality sourcing and rigorous third-party testing, which is reassuring. It's easy to consume, mixing relatively smoothly without a significant gritty texture when added to water or a shake. I've noticed a subtle but definite improvement in my overall energy levels throughout the day, and I feel it supports my general well-being. While the cost is on the higher end for this category, the quality and the brand's commitment to purity seem to justify the premium price point for consistent daily use.

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iHerb Customer

Posted on 7/08/2025

Australia

Supports Healthy Hair, Skin & Nails

Verified Purchase

I have been using Natrol Biotin 10,000 mcg for a few months now and I am really impressed. People often talk about scent, use, quality, size, age, package, benefit, composition, feel, effective, value, and frequency and this product ticks all the boxes. The composition feels clean and well formulated and the tablet size is easy to swallow. I take one daily and it is effective. My hair feels thicker, my nails are stronger, and my skin looks healthier. The packaging is practical and gives great value for 100 tablets. Perfect for all ages looking to boost their beauty routine.

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iHerbCustomer

Silver

Posted on 5/10/2025

Israel

114

109

Good product

Verified Purchase

Simple product, quality, normal size, perfect packaging. Product benefits: A delicate and pleasant scent that lasts a long time, really adds to the feeling of freshness. The quality is noticeable from the first use - a pleasant texture, absorbs well and leaves the skin smooth. I was also surprised by the size - a large and affordable bottle, lasts a long time. Highly recommend! Perfect texture, and a pleasant scent. High quality. Regular use "

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iHerbCustomer

Posted on 2/11/2025

Japan

125

To prevent hair loss.

Verified Purchase

I think it's best for people who don't need minoxidil to take this. It really is a preventative measure. Hair loss has definitely decreased when I take a bath or use a hair dryer. I no longer have any hair loss that was visibly falling out. It contains a lot of ingredients and is reasonably priced, so I recommend it.

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kingsaiajay

Posted on 25/10/2025

India

Excellent biotin for hair and nail growth

Verified Purchase

This Natrol Biotin is one of my favorite supplements. After taking it consistently, I’ve noticed my hair growing faster and looking shinier, and my nails have become much stronger. The tablets are small and easy to swallow, and the 200-count bottle lasts a long time. Great quality and value — perfect for anyone looking to support healthy hair, skin, and nails.

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BACK-DOOR

Gold

Posted on 19/10/2025

United Arab Emirates

689

Verified Purchase

Excellent Quality, Fast Delivery & Perfect Packaging! I’m extremely satisfied with this product from iHerb! The quality is absolutely amazing — you can really feel the difference compared to other brands. The packaging was neat, safe, and well-sealed, ensuring the product arrived in perfect condition. Shipping was super fast and reliable, even faster than I expected! Everything came fresh, authentic, and exactly as described on the website. I also appreciate how iHerb always delivers genuine products with great expiration dates and professional packaging. Highly recommend this item to anyone looking for top quality, great value, and trusted delivery service. I’ll definitely order again soon!

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Aisha93beuaty

Gold

Posted on 17/08/2025

Oman

324

233

1,561

good

Verified Purchase

Excellent Beauty Vitamin, natural ingredients and a large quantity sufficient for about two months. The quality is excellent. The benefit increases hair length and gives freshness, vitality and a beautiful effect on the skin and general health with continuous use. It is an excellent antioxidant and does not cause stomach sensitivity. The package is easy to use. Cons: The pills are very large and difficult to swallow. I have to divide them if I use it.

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iHerbCustomer

Gold

Posted on 13/08/2025

United Arab Emirates

886

271

Good

Verified Purchase

’ve been using these for over a month now, and I can honestly say I feel a difference. My energy levels are more stable throughout the day, and I don’t feel that afternoon crash I used to. The tablet is a bit large, but it goes down easily with water. I also like that it doesn’t upset my stomach, even when taken without food. Great ingredient list, no weird fillers, and the price is super reasonable compared to similar products. Definitely ordering again!

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iHerbCustomer

Gold

Posted on 9/08/2025

Kazakhstan

460

Great

Verified Purchase

Biotin This is a quality supplement made from good ingredients Dosage 5000 units in one capsule Biotin is a useful supplement for healthy beauty of hair, nails, skin, so some cosmetologists call it the vitamin of beauty The packaging is beautiful and durable And it also helps maintain a healthy weight, Reduces the percentage of fat in the liver, helps break down and absorb fats

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huniglowup

Posted on 14/10/2025

Saudi Arabia

Verified Purchase

One of the best companies I have taken biotin from. It literally made an unnatural difference for me. If you are taking biotin, do not hesitate to go to Nitrol Company 👌🏻😍

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