We tested 17 products to find the five best biotin supplements in 2025. (Photo illustration: Yahoo News; photos: Amazon)(Photo illustration: Yahoo News; photos: Amazon)
Thinning hair? More wrinkles? Aging is no joke. With every turn around the sun, the importance of maintaining healthy hair, skin and nails starts to feel more urgent. And while many of the supplements promising age-defying results are based on shaky science, your local grocery store's health food aisle is likely brimming with formulations promising to bring back your youthful, effortless glow. If you're on a mission to improve the health of your hair, skin or nails, chances are you've searched "best biotin supplement" hoping to find a product that really works. As a registered dietitian with beauty and wellness on my radar, I'm here to help you out. I spoke with several nutrition experts, looked into the latest research and tested 17 products to find the best ones on the market. The result? This list of the five best biotin supplements to consider in 2025.
Biotin (vitamin B7) is an essential micronutrient that's best known for its role in the production of keratin, a key structural protein in — you guessed it — hair, skin and nails. But if your daily routine already includes a multivitamin or other supplements, do you really need a dedicated biotin addition? And even more to the point, does biotin actually work?
Because of its importance for keratin synthesis, being deficient in biotin can lead to symptoms like brittle nails, hair loss and skin rashes. And in cases of true deficiency, biotin supplements have been shown to improve these aspects of beauty. However, despite what influencers and trendy supplements may have you believe, research hasn't shown biotin to be effective for reversing hair loss if you're already getting enough of the nutrient in your diet. As for nails, taking additional biotin may be helpful, though the jury is still out as more studies need to be done.
That said, if blood work has indicated your biotin levels are low, a biotin supplement could be the logical next step (after discussing options with your health care provider) in your quest for righting any deficiency and rejuvenating your hair, skin and nails. If you're in the market, consider one of these options that we tried and tested.
A note on supplements
The products included on this list are dietary supplements. Statements about these products have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease. Dietary supplements are not appropriate for everyone and may interact with other supplements or medications, so talk to your health care provider before adding a dietary supplement to your routine.
Form: Capsules | Dose: 2 capsules | Key Nutrients: Zinc, calcium, iodine, magnesium, selenium, copper, manganese, chromium, B vitamins and vitamins A, C, D, E and K | Missing Nutrients: Iron, choline and omega-3 DHA and EPA
Thorne Basic Nutrients 2/Day easily took the crown as the best overall multivitamin due to its comprehensive formula and commitment to quality. A two-capsule serving delivers 21 essential vitamins and minerals, including 250% of the daily value (DV) for vitamin D — a nutrient many adults don't get enough of. It also provides all eight B vitamins, critical for energy production, brain health and new blood cell formation.
Thorne’s reputation for rigorous ingredient and product testing sets it apart in the supplement industry. Its Basic Nutrients 2/Day is NSF Certified for Sport, ensuring purity, potency and adherence to safe manufacturing practices.
Our tester was impressed with the multivitamin, appreciating its well-rounded formulation and experiencing no digestive issues. While the capsules are slightly larger, they were still easy to swallow. The tester described the cost of these vitamins as a "good middle-of-the-road price," highlighting it as a solid balance between quality and value.
While this multivitamin excels in many areas, it's worth noting that it does not include iron, which may make it less suitable for menstruating people. It also contains high doses of certain nutrients that might not be necessary for individuals who already eat a well-balanced diet.
Oh, and beware of the smell! Many Amazon reviews commented on the strong, lingering smell, with one 5-star review saying, "Very high quality - but… probably the worst smelling/tasting vitamin I’ve ever witnessed. The benefits out-weigh the stench though!" You've been warned!
Form: Soft gel | Dosage: 1 soft gel daily | # Servings: 180 | Serving strength (% of the DV): 10,000 mcg (33,333%)
Our top pick for the best affordable biotin supplement is Nature's Bounty Biotin 10,000 mcg. This budget-friendly supplement packs a high dose of biotin without compromising quality. The product is free from artificial colors, flavors and sweeteners and is third-party tested to ensure label accuracy.
I've tried Nature's Bounty supplements in the past, and testing went as expected: The small gelcaps were easy to swallow, had zero aftertaste and didn't upset my stomach. Just be prepared: The capsules have an unpleasant aroma. However, don't let the smell keep you from considering this truly great budget-friendly pick — I promise they don't taste as bad as they smell!
According to one Amazon reviewer, "I've been using these vitamins for weeks now, and I can honestly say I've noticed a positive change in my energy levels and overall well-being. The capsules are easy to swallow, they don't upset my stomach, and I really appreciate the clean ingredients. I also love that they come in a well-sealed bottle with clear instructions." If you're deficient in biotin and on the hunt for a quality product within your budget, you can't go wrong with this choice. Just keep in mind that they're not vegan-friendly, so you'll want to steer clear if you follow a vegan diet.
Form: Capsule | Dosage: 1 capsule daily | # Servings: 120 | Serving strength (% of the DV): 5,000 mcg (16,667%)
Now Foods' biotin supplement lineup is 100% vegan- and vegetarian-friendly. You can choose from three strengths — 1,000 mcg, 5,000 mcg and 10,000 mcg — or a multinutrient beauty blend. In addition to being free of animal products and by-products, Now Foods Biotin is halal and kosher compliant, meaning it adheres to strict standards that require supplements to be prepared in a hygienic and humane manner.
The small capsules are odorless and, despite their large size, relatively easy to swallow. While not third-party tested, Now Foods supplements are tested for purity and potency in the company's ISO-certified labs.
Several Amazon reviewers swear by the product's quality and price point, stating "the affordability and quality are just what I want (again and again)." Another says, "I'm taking this product for my skin, but it's made my nails grow."
Form: Gummy | Dosage: 2 gummies daily | # Servings: 30 | Serving strength (% of the DV): 3,000 mcg (10,000%)
OLLY's Heavenly Hair is easily one of the most delicious gummy supplements I've ever had. The punch of tropical citrus flavor paired with its soft, chewy texture is a slam dunk. Each two-gummy serving contains 3,000 mcg of biotin, along with other ingredients that may be beneficial for hair health.
Zinc and keratin, for example, are important for hair growth, while amla extract and horsetail extract may help reduce inflammation and promote healthy hair, skin and nails, though research is limited and inconclusive. It's also worth noting that the amount of keratin found in OLLY's Heavenly Hair formulation (25 mg) is far lower than the clinically studied dose of 500-1,000 mg.
I tend to like gummy supplements, and OLLY's Heavenly Hair makes a nice addition to my repertoire. In addition to their winning flavor and texture, they're also naturally flavored and sweetened. For added peace of mind, OLLY supplements are third-party tested for purity and potency.
Although I didn't use it long enough to confirm noticeable results myself, the supplement has more than 3,000 five-star reviews on Amazon — many of which credit the product with promoting fuller, more luscious-looking locks. One reviewer raves, "As someone who has struggled with hair loss for some time, finding a solution that actually works has been a challenge. However, since I started using OLLY Heavenly Hair Gummy, I have seen a significant improvement in my hair health. Within just a month of using this chewable supplement, I have noticed a remarkable reduction in hair loss. Previously, I would lose an alarming amount of hair every day, which was a cause of great concern for me. However, thanks to OLLY Heavenly Hair Gummy, the shedding has reduced dramatically, and my hair feels healthier and stronger than ever."
Form: Soft gel | Dosage: 1 soft gel daily | # Servings: 30 | Serving strength (% of the DV): 10,000 mcg (33,333%)
Nature Made Hair Growth Lustriva Softgels is our top choice for hair growth thanks to its inclusion of Lustriva — a patented blend of magnesium biotinate (a more potent form of biotin) and arginine silicate (a form of silicon). These two unique compounds are thought to work together to promote healthy hair growth and more youthful skin. In a small, randomized, double-blind 2021 study, Lustriva was shown to significantly boost hair growth in healthy adult women as compared with those who took a placebo, with noticeable results as early as three weeks. That said, it's worth noting that the study was funded by the company behind Lustriva, and most of the other research on this patented ingredient has been done in animals — not humans.
While it's important to temper your expectations, because of the addition of Lustriva, this product may be more likely to support hair growth than a traditional biotin supplement, especially if you don't have a biotin deficiency. Also included in the blend are vitamin A (as beta carotene) and vitamin C, both of which are necessary for healthy hair and skin. Since vitamin A is a fat-soluble vitamin, it's recommended to take this supplement with food.
The gelcaps are on the larger side, but I found them surprisingly easy to swallow with a generous sip of water. However, some reviewers complain that the round shape makes the capsules harder to swallow than traditional oblong-shaped soft gels. This drawback aside, Nature Made Hair Growth Lustriva Softgels is well reviewed on Amazon. One reviewer writes, "I've been using this product for almost 6 months, and I've noticed pretty favorable results. My hair has been growing in stronger, and I started to see areas of thinning (edges) become more dense. My nails are less prone to breaking... My eyebrows take less time to grow back, but beware — this product makes ALL hair thicker."
Due to insufficient research, there is no established recommended dietary allowance (RDA) for biotin. Instead, the current adequate intake (AI) for biotin is 30 mcg for healthy adults, with breastfeeding individuals needing a slightly higher dose of 35 mcg per day.
Most people are easily able to meet this amount, as biotin is found in a wide variety of foods, like eggs, salmon, pork, beef, sunflower seeds, almonds, sweet potatoes, spinach, broccoli and dairy products. For example, 1 large egg contains 10 mcg of biotin. If you eat three eggs, you've already reached your daily goal.
If your doctor or dietitian recommends that you take a biotin supplement, it's important to follow the dosage recommendations on the bottle unless advised otherwise by your health care professional.
When shopping for a biotin supplement, you'll want to factor in your diet, health status and personal preferences. Here are a few considerations to keep in mind:
Supplement form: Biotin supplements come in several forms, including capsules, soft gels, gummies, liquids and powders. The best option is the one you feel most comfortable taking.
Formulation: According to the National Institutes of Health Office of Dietary Supplements, taking high doses of biotin has not been shown to be toxic. That said, it's best to talk with a health care professional about the right dose for you. In addition to an appropriate dose, it's important to consider other active ingredients in the formulation. While some may have some benefits, others may have little evidence to support their benefit or may interact with medications you're taking.
Value: Adding supplements to your daily routine means an extra monthly cost. When determining whether a supplement fits into your budget, be sure to compare the price per serving and factor in any potential shipping costs (if ordering online).
Third-party testing: To ensure a biotin supplement contains what it claims to on the label, look for products that are tested for purity and potency, ideally in third-party certified labs or by organizations like NSF or the United States Pharmacopeia (USP).
As a dietitian and self-proclaimed supplement connoisseur, my personal experience and knowledge in the field helped me narrow down the best biotin supplements. To better understand what makes an ideal biotin supplement, I consulted two fellow registered dietitians. After an extensive search, I selected 17 products from 11 different brands to test over an eight-week period.
Products were evaluated based on:
Formulation: I prioritized products containing just one active ingredient — biotin — though I also included some supplement blends. Active ingredients were researched to determine the strength of evidence to support their efficacy for hair, skin and nail health.
Third-party testing: When possible, I chose supplements that are third-party tested for purity and potency. Some brands, like Now Foods, were also included due to their extensive in-house testing and third-party certified facilities.
Ease of use: I evaluated each supplement based on how clear its directions were and how easy it was to take.
Taste: I noted the smell, taste and aftertaste of each product and whether any of these factors could be a deal-breaker.
Overall value: Taking all of the factors above into consideration with the product's cost, I determined which supplements provide the best overall bang for your buck.
We tested a number of biotin supplements that didn't make our final list — but that doesn't mean they're not worth considering. Here's a look at the other products we tried:
Naked Biotin: I don't have anything bad to say about this product. It's third-party tested for purity and potency, free of artificial additives and vegan-friendly. Each capsule-size serving provides a high dose of biotin (10,000 mcg), which isn't necessary for everyone. It was a close runner-up as the best overall biotin supplement, with Thorne narrowly taking the win for its wider availability and impressive testing standards.
Vital Proteins Hair Complex: I was truly excited about this product as it combines biotin, Lustriva and collagen — a protein that's found in hair. I tried this product several times to give it a true chance, but no matter how I mixed it (shaker cup, milk frother, etc.), it remained a clump of powder on the side of the cup. That said, if you don't mind using a full-size blender to whip this complex into a smoothie or shake, this powder is worth considering.
Garden of Life Hair Growth Sustained Release: In addition to 3,000 mcg of biotin, this capsule contains Keranat oil — a patented complex of miliacin, derived from millet seed. One small study found that Keranat significantly improved hair density and scalp dryness in women after 12 weeks. While promising, more research is needed to confirm its effectiveness and optimal dose. The pills, while not small, aren't overly large either and were easy to swallow. The biggest drawback is the cost — $40 for a one-month supply.
OLLY Ultra Strength Hair Multi-Benefit Blend: This well-rounded blend contains biotin, vitamin D, folate, vitamin B12, iron, zinc, copper and keratin, all of which are important for healthy hair. While this supplement could be a good option if hair health is your main concern, and you're not already taking a multivitamin, I found the soft gels difficult to swallow.
Natrol Biotin 10,000 mcg Fast Dissolve: This fast-dissolve tablet is handy for those who dislike swallowing pills. It provides a high dose of biotin, is USP Verified for label accuracy and has zero grams of added sugar. However, I found the strawberry flavor cloyingly sweet. It wouldn't be a supplement I'd want to take regularly.
MegaFood Skin, Nails & Hair 2: This whole-foods-based vitamin feels more like a multivitamin geared toward hair, skin and nail health. In addition to biotin, it contains vitamin A, vitamin C, vitamin E, vitamin B6, pantothenic acid, zinc, selenium and a food and herb blend. What's particularly nice about MegaFood's product is the more realistic dose of biotin: At 300 mcg per serving, it puts you at far less risk of lab test interference. The blend is mostly well reviewed online, though some feel it isn't worth its relatively high price.
The Vitamin Shoppe Biotin 5000 mcg: The Vitamin Shoppe's Biotin capsules come in several doses ranging from 500 mcg to 10,000 mcg. It's a solid option if you can take advantage of the company's online sales, often offering BOGOs and 20% off with free shipping. This supplement is third-party tested and free of gluten, soy, tree nuts and dairy. However, because the capsules contain gelatin, it isn't suitable for vegan diets.
The Vitamin Shoppe Biotin Gummies 10,000 mcg: Like its capsules, the Vitamin Shoppe's Biotin gummies are a solid choice. They're vegan-friendly and contain no artificial sweeteners. While the strawberry flavor was quite delicious, I simply liked other gummies more.
Nature Made Zero Sugar Hair Skin Nails Gummies 2500 mcg Biotin: These delicious strawberry gummies are soft and chewy. With a 60-day supply in one bottle, they're an affordable option at $19 per bottle. However, unlike many Nature Made products, this one isn't USP Verified.
Now Foods Biotin 1,000 mcg: This supplement is essentially identical to our best vegan pick, just with a lower dose. As with the 5,000 mcg option, it's vegan-friendly, easy to swallow, affordable and tested for label accuracy in ISO-certified labs.
Now Foods Biotin 10,000 mcg: On the opposite end of the spectrum is this high-dose version of our best vegan pick. As with any high-dose biotin supplement, keep in mind that it can interfere with certain lab tests.
Now Foods Solutions Vegan Hair, Skin & Nails: This multinutrient blend is vegan-friendly and relatively affordable compared with other beauty blends. Just keep in mind that many of its ingredients, like horsetail and methylsulfonylmethane (MSM), need more robust studies to confirm their effectiveness.
"For most people, biotin supplementation isn't necessary unless there's a diagnosed deficiency," says Lauren Manaker, a registered dietitian and owner of Nutrition Now Counseling. "In those cases, it can help address symptoms like thinning hair, brittle nails or skin rashes."
Michelle Routhenstein, a cardiology dietitian and heart health expert at Entirely Nourished, agrees, adding, "The body only needs small amounts of biotin, and it's found in many common foods like eggs, nuts and whole grains."
If you're concerned about a potential deficiency, it's best to have your blood work done before adding a supplement to your routine.
If you're already getting enough biotin in your diet, taking a biotin supplement is unlikely to help with hair growth. However, in cases of a true deficiency, biotin supplements may help.
Biotin is generally safe and well-tolerated. However, it's important to be aware that high doses of biotin can interfere with certain lab tests, including those used to detect thyroid issues and heart attacks. "It can cause these tests, especially troponin panels, to show a false normal result, even when someone is actually having a heart attack," says Routhenstein.
Yes, biotin supplements are generally safe for pregnant or breastfeeding people. However, because prenatal vitamins typically contain biotin, most people who are pregnant or breastfeeding don't need an additional biotin supplement.
You may not really notice any change when taking biotin. "If you're deficient in biotin, it may take several months of consistent supplementation to see results," says Manaker.
Lauren Manaker, MS, RDN, LDN, CLEC, CPT, registered dietitian and owner of Nutrition Now Counseling
Michelle Routhenstein, MS, RD, CDCES, CDN, cardiology dietitian and heart health expert at Entirely Nourished
Our health content is for informational purposes only and is not intended as professional medical advice. Consult a medical professional on questions about your health.
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