The 5 Best Biotin Supplements of 2026: Tested and Approved

Biotin, a B vitamin, is important for hair, skin, and nail health, so we looked at popular biotin supplements to learn more about their claims and active ingredients. We also asked our team of testers to give these supplements a try and share their experiences. Here’s what we learned, including our top recommendations.

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Our team of expert testers has tried hundreds of the most popular supplements on the market today, using our comprehensive supplement testing methodology to find the best products for all folks.

Best Biotin Supplements of 2026

• Best Biotin Supplement Overall: Nutrafol Women
• Best Affordable Biotin Supplement: Nutricost Biotin
• Best Biotin Supplement for Hair Loss: Moérie Ultimate Beauty Boost
• Best Biotin Supplement with Collagen: 1st Phorm Hair Skin Nail Essentials
• Best Biotin Supplement for Athletes: Thorne Biotin

Best Biotin Supplement Comparison Table

Biotin	Biotin per Serving	Form	Serving Size	Third-Party Testing
Nutrafol Women	3,000 mcg (3 mg)	Capsule	4 capsules	Yes
Nutricost Biotin	10,000 mcg (10 mg)	Capsule	1 capsule	Yes
Moérie Ultimate Beauty Boost	12,000 mcg (12 mg)	Capsule	2 capsules	Yes
1st Phorm Hair Skin Nail Essentials	6,000 mcg (6 mg)	Capsule	3 capsules	Yes
Thorne Biotin	8,000 mcg (8 mg)	Capsule	1 capsule	Yes

Nutrafol Women
Biotin per Serving	3,000 mcg (3 mg)
Form	Capsule
Serving Size	4 capsules
Third-Party Testing	Yes
Nutricost Biotin
Biotin per Serving	10,000 mcg (10 mg)
Form	Capsule
Serving Size	1 capsule
Third-Party Testing	Yes
Moérie Ultimate Beauty Boost
Biotin per Serving	12,000 mcg (12 mg)
Form	Capsule
Serving Size	2 capsules
Third-Party Testing	Yes
1st Phorm Hair Skin Nail Essentials
Biotin per Serving	6,000 mcg (6 mg)
Form	Capsule
Serving Size	3 capsules
Third-Party Testing	Yes
Thorne Biotin
Biotin per Serving	8,000 mcg (8 mg)
Form	Capsule
Serving Size	1 capsule
Third-Party Testing	Yes

Best Biotin Supplement Overall: Nutrafol Women

Our Thoughts on Nutrafol Women

Nutrafol Women is a hair growth supplement designed for women ages 18 to 44 who experience thinning hair. According to the company, the formula addresses key causes of thinning hair including stress, lifestyle, and nutrition, and results may be seen in three to six months with consistent daily usage. While Nutrafol also offers a men’s hair growth supplement, we focused on the women’s for this review.

Kate, our tester, tried Nutrafol and shared her experience. She first commented on the product’s packaging, a glass container that “looks like a luxury product.” Instructions were listed “clearly on the back of the bottle,” according to Kate, who rated the product a 5 out of 5 for how easy it was to read and follow those instructions. 

Our tester took four pills with a meal, as instructed. She said, “They’re your average sized vitamin capsule, however four of them is quite a lot to take at one time.”  While she had no issue taking them, she noted that someone who doesn’t enjoy taking and swallowing pills might have a hard time taking four every day. She rated the product a 3 out of 5 for how easy it was to swallow the capsules.

While there was “the slightest earth sent” when Kate opened the bottle, she said the product itself had no taste. She gave it a 5 out of 5 for its flavor. 

Lastly, Kate reported no negative side effects while taking this product, though she noticed that some people online said they experienced slight digestive discomfort. Overall, Kate said, “I think it’s a good choice for someone who wants a trusted brand with great packaging and product quality.”

Specs:

• Biotin per serving: 3,000 mcg
• Key ingredients: Biotin, vitamin A, vitamin C, vitamin D, vitamin E, Synergen Complex, and Nutrafol Blend
• Serving size: 4 capsules
• Servings per container: 30

Best Affordable Biotin Supplement: Nutricost Biotin

Our Thoughts on Nutricost Biotin

Nutricost’s Biotin supplement contains 10,000 mcg of biotin per capsule, which is about 33,333% of the recommended daily value (RDV)—the second highest biotin dosage in the lineup. 

Our tester and nutrition coach, Pete, tried Nutricost’s supplement. Upon first examining the bottle he noted, “The label design is simple and straightforward,” and “the container isn’t too large; I’d consider it to be travel friendly.” He rated the instructions a 5 out of 5. 

Pete took one capsule daily with eight to 12 ounces of water, as instructed, and said, “The size of the capsule is smaller than average, and it was very easy to swallow.” He rated it a 3 out of 5 for its swallowability. The capsule didn’t have any particular flavor, according to Pete, who gave the product a 3 out of 5 for how it tasted. 

After taking Nutricost’s biotin supplement, Pete said he didn’t experience any negative side effects or digestive issues from using this product. As for any noticeable benefits, he explained, “I haven’t been taking it long enough to feel any of the potential benefits.”

In analyzing the product, Pete said, “Nutricost’s Biotin is a popular supplement choice for people looking to support hair, nail, and skin health. Biotin is a B vitamin that plays a role in keratin production, which is the protein that makes up your hair and nails. The dose here is 10,000 mcg (10 mg) per capsule, which is on the high end. The daily adequate intake for adults is just 30 micrograms, so this is over 300 times that amount.”

According to Pete, high-dose biotin supplements like this one are beneficial for people who are actually biotin deficient, and most healthy adults eating a normal diet aren’t usually deficient. However, Pete added, “The good news is that biotin is water-soluble, so your body just flushes out what it doesn’t use and it’s considered very safe, even at this high dosage.”

Specs:

• Biotin per serving: 10,000 mcg (10 mg)
• Key ingredients: Biotin
• Serving size: 1 capsule
• Servings per container: 120

Best Biotin Supplement for Hair Loss: Moérie Ultimate Beauty Boost

Our Thoughts on Moérie Ultimate Beauty Boost

Moérie’s Ultimate Beauty Boost Supplement is designed to deliver nutrients that can help promote healthy hair, glowing skin, and stronger nails. The product’s key ingredients include biotin, hyaluronic acid, vitamins B9, B12, and B6, vitamin E, selenium, copper, and zinc. Moérie also notes that supplement usage should be combined with a balanced lifestyle, proper nutrition, and “complementary hair care routines.”

Our tester, Charlotte, tried this product and was a fan at first sight. Charlotte said, “I think its packaging is so cute and aesthetically pleasing. The box—don’t even get me started! When you open it up it has tons of information about what you are taking, and you learn about all the different vitamins that go into this product and what they are used for.” 

When it came time to try the product, Charlotte noted that the instructions were “very easy to read.” She rated the product a 5 out of 5 for its easy-to-understand directions. She took two capsules as instructed, and noted, “The serving size wasn’t bad at all,” adding that the size was fine—and they were easy to take. She gave a 5 out of 5 for how easy the capsules were to swallow. Charlotte also appreciated that the capsule’s contents were pink, saying, “Obsessed with the fact it’s pink—it’s so girly pop of them.”

Our tester reported there wasn’t any particular taste, which she was happy about. She explained, “The smell was kind of off putting. It has an earthy smell to it that’s kind of sour, but only when you sniff the whole bottle. The single pills were fine to take.” She rated the product a 5 out of 5 for taste. 

Charlotte didn’t experience any side effects after taking the supplement for about one week and gave this supplement an overall very positive review. She said, “It really is an all-encompassing hair health product. I think if you are willing to invest, since it is on the pricier side, then this is definitely worth your money. Plus, it has super cute packaging and I’m excited to take it every morning!”

Specs:

• Biotin per serving: 12 mg
• Key ingredients: Biotin, hyaluronic acid, vitamin E, vitamin B9, vitamin B12, and more
• Serving size: 2 capsules
• Servings per container: 30

Best Biotin Supplement with Collagen: 1st Phorm Hair Skin Nail Essentials

Our Thoughts on 1st Phorm Hair Skin Nail Essentials

1st Phorm’s Hair Skin Nail Essentials offers a “comprehensive formula” designed to help support cell function and collagen production. The product also claims to provide antioxidants intended to help protect against free radicals. The formula includes biotin and collagen, along with 28 other nutrients and ingredients, and the product is designed to help “support hair’s natural growth, thickness, texture, volume, and shine” in addition to the purported skin and nail benefits.

Pete tried 1st Phorm’s Hair Skin Nail Essentials supplement and first noticed an issue with the packaging. As Pete explained, “The text on the label is extremely small and difficult to read,” but the instructions themselves were straightforward. Pete rated the product a 4 out of 5 for its easy-to-follow instructions.

He took three capsules (one serving) with water and a meal as instructed, and noted, “These capsules are quite large, roughly an inch in length and half a centimeter wide.” He rated the product a 3 out of 5 for how easy it was to swallow the capsules. He reported that the capsules didn’t have any particular flavor, giving them a 3 out of 5 for their neutral taste.  

Pete didn’t experience any digestive issues or negative side effects from using this product, and when it came to any noticeable improvements in his hair, he said, “I haven’t used this supplement long enough to notice any of the potential benefits.” 

He also analyzed the formula itself, explaining, “This Hair Skin Nail Essentials supplement from 1st Phorm is a broader formula rather than a single-ingredient biotin supplement. This multi-ingredient approach is a well-rounded strategy for hair, skin, and nail support. Collagen, in particular, has decent research behind it for skin elasticity and nail strength. The 6,000 micrograms of biotin is a solid dose and in a reasonable range without going overboard.”

Specs:

• Biotin per serving: 6,000 mcg (6 mg)
• Key ingredients: Biotin, vitamin A, vitamin C, vitamin D, vitamin E, thiamin, and more
• Serving size: 3 capsules
• Servings per container: 30

Best Biotin Supplement for Athletes: Thorne Biotin

Our Thoughts on Thorne Biotin

Thorne’s biotin supplement contains a high concentration of biotin, and is intended to promote skin, hair, nails, nerve health, and healthy blood sugar metabolism, according to the company’s website. The brand also aligns itself with athletes, with the company website reporting Thorne is the official partner of the United Fighting Championship (UFC), in addition to partnering with various professional athletes and sports teams.

Pete, our tester, tried Thorne’s Biotin supplement and reported back. Upon examining the product he noted, “The text on the label is pretty small, so you do need to hold it fairly close to your face to read.” He rated the product a 3 out of 5 for how easy it was to read the instructions.

He then took the supplement as instructed, one capsule twice a day, noting the “tiny” size. He said it’s “extremely easy to swallow,” and gave the product a 3 out of 5 for how easy it was to take. Pete also said the capsule was flavorless, rating it a 3 out of 5 for flavor.

Pete didn’t experience any side effects while using the product, but he didn’t notice any benefits, either. However, he explained, “I haven’t been taking it long enough to notice any of the potential benefits.” Pete also analyzed the ingredients, noting, “Each of Thorne’s Biotin capsules contains 8,000 mcg (8 mg) of biotin. This is a strong, but slightly more moderate dose than the 10,000 mcg options on the market. The research backing for hair and nail benefits is most meaningful for people who are actually deficient in this vitamin.”

Specs:

• Biotin per serving: 8 mg
• Key ingredients: Biotin
• Serving size: 1 capsule
• Servings per container: 60

What is Biotin?

Biotin is a B vitamin and an essential nutrient found in both foods—including organ meats, eggs, fish, meat, seeds, nuts, and some vegetables like sweet potatoes—as well as dietary supplements. For adults the general recommended daily intake is 30 micrograms, or 35 micrograms for breastfeeding women. 

Biotin deficiency is rare, with symptoms including thinning hair that progresses to loss of hair on the body, a red rash around the eyes, nose, mouth, and perineum, conjunctivitis, seizures, skin infection, brittle nails, and more.

How We Tested and Selected the Best Biotin Supplements

There can be substantial variation in supplement quality. Here’s what we focused on during testing.   

Formula

We partner with a registered dietitian to assess product formulas, and to find out whether product dosages are clinically supported and in line with recommended daily values.

Taste and Swallowability

We noted whether the products had any particular flavor, and we also noted how easy or difficult each product was to swallow. We looked at the form of the supplement, for example a powder versus a capsule, and how many servings were required per day.

Third-Party Testing

The U.S. Food and Drug Administration (FDA) does not approve dietary supplements for safety or efficacy, so ingredients and their amounts may be different from what’s on the label. We look for products that have been third-party tested to confirm safety and accuracy.    

Value

Here’s a closer look at each product’s cost breakdown.

Biotin	Biotin Per Serving	Price	Servings	Cost Per serving
Nutrafol Women	3,000 mcg (3 mg)	$88	30	$2.93
Nutricost Biotin	10,000 mcg (10 mg)	$10.97	120	$0.09
Moérie Ultimate Beauty Boost	12,000 mcg (12 mg)	$60	30	$2.00
1st Phorm Hair Skin Nail Essentials	6,000 mcg (6 mg)	$40.99	30	$1.37
Thorne Biotin	8,000 mcg (8 mg)	$28	60	$0.47

Nutrafol Women
Biotin Per Serving	3,000 mcg (3 mg)
Price	$88
Servings	30
Cost Per serving	$2.93
Nutricost Biotin
Biotin Per Serving	10,000 mcg (10 mg)
Price	$10.97
Servings	120
Cost Per serving	$0.09
Moérie Ultimate Beauty Boost
Biotin Per Serving	12,000 mcg (12 mg)
Price	$60
Servings	30
Cost Per serving	$2.00
1st Phorm Hair Skin Nail Essentials
Biotin Per Serving	6,000 mcg (6 mg)
Price	$40.99
Servings	30
Cost Per serving	$1.37
Thorne Biotin
Biotin Per Serving	8,000 mcg (8 mg)
Price	$28
Servings	60
Cost Per serving	$0.47

How to Find the Best Biotin Supplement for You

Here are some things to consider when you’re shopping for a biotin supplement.

Your Personal Goals

Consider your unique health goals, and what you’re hoping to accomplish by taking a supplement. We also encourage you to speak with your healthcare provider before starting any new supplement, as your healthcare provider should be able to help you set realistic health goals and help you determine whether a certain supplement may be the right choice for you.

Form

Choose the supplement type you most enjoy taking, whether capsules, powder, or something else. If you actually enjoy taking a supplement, you may be more likely to do so consistently.

Dosage 

It’s important to choose the appropriate dosage for your unique medical needs. Be sure to speak with your healthcare provider about the appropriate amount of biotin for you.

Formula

As part of our testing process, we work with a registered dietitian to find the safest formulas. This ensures that product dosages are clinically supported and support the recommended daily values, and that products don’t contain any undesirable ingredients.    

Cost

Consider how much you’re willing to spend, factoring in the necessity of repeat purchases if you continue taking the supplement. And remember that a more expensive supplement isn’t necessarily better.

Third-Party Testing

The U.S. Food and Drug Administration (FDA) doesn’t approve dietary supplements for safety or efficacy, so ingredients and their amounts may differ from what’s on the label. For that reason, we look for products that have been third-party tested to confirm safety and accuracy.

Benefits of Biotin Supplements

Most of the research on biotin and hair loss concludes that high-quality research in this area is lacking—despite biotin’s widespread use. Still, some research seems to indicate that for people who have an underlying condition causing poor hair or nail growth, biotin might help.

• A 2024 study concluded that “there is a large discrepancy between the public’s perception of its [biotin’s] efficacy and the scientific literature. The utility of biotin as a hair supplement is not supported by high-quality studies.”
• A 2017 study looked at a small number of cases in which people used biotin, finding that all cases showed clinical improvement after receiving biotin. However, the researchers also note that, “In all cases, patients receiving biotin supplementation had an underlying pathology for poor hair or nail growth.” 

What to Avoid in Biotin Supplements

While you want to make sure a biotin supplement’s active ingredients are in line with your needs, we also recommend making sure any biotin supplements you’re considering don’t contain certain things. We generally recommend avoiding:

• Unnecessary fillers like artificial colors or excessive binding ingredients
• Products that haven’t been third-party tested for safety or efficacy.

Frequently asked questions

What is the best brand of biotin to take?

If you’re considering a biotin supplement, you should choose one based on your unique needs and preferences. Beyond that, we recommend finding one that’s third-party tested, with a dosage appropriate for you.

Can biotin regrow lost hair?

Recent research shows that despite biotin’s widespread popularity, scientific literature does not really support using biotin as a hair supplement. Specifically, there’s a lack of high-quality studies showing biotin’s efficacy in treating hair loss.

What should you not mix biotin with?

According to the National Institutes of Health (NIH), glycoprotein found in raw egg whites can bind to dietary biotin and prevent absorption. For this reason, people should avoid consuming biotin with raw egg whites. You can avoid this by cooking egg whites.