Best Biotin Supplements (2025) | Garage Gym Reviews

Nutricost has built a reputation for offering straightforward, budget-friendly supplements that meet everyday wellness needs—and its biotin capsules are no exception. Each serving provides a potent 10,000 micrograms of biotin free from unnecessary fillers or additives, all at just $0.10 per dose. That simplicity and value earn 5 out of 5 stars for both formulation and cost, securing its spot as our top pick for biotin supplements.

But a quick word of caution: More isn’t always better. While biotin is water-soluble—meaning your body flushes out excess amounts through urine and is generally considered safe—mega doses may not be necessary. Dr. Raj Dasgupta explains, “Extremely high doses can interfere with lab work and possibly trigger skin issues. Stick to moderate amounts unless told otherwise by a healthcare provider.”

As for user experience, it gets incredibly positive reviews. One Amazon reviewer shared, “My hair is stronger and it doesn’t fall out as much as before. My nails look great, too.” Users also express that the single capsule is tasteless, easy to swallow, and earns 5 out of 5 stars for side effects, taste, and swallowability. 

The one downside? Transparency around third-party testing. While the product is manufactured in a GMP-compliant, FDA-registered facility and reportedly undergoes third-party testing, Nutricost doesn’t disclose which labs are used or whether banned substances are included in the screening. This is a common note of ours with Nutricost offerings, such as Nutricost Whey Protein Concentrate. For that reason, it receives a 3 out of 5 rating for third-party testing.

Still, with over 16,000 reviews averaging 4.7 out of 5 stars on Amazon, it’s clear this supplement is a hit for many. However, as with any supplement, it’s worth evaluating your own needs and consulting a professional for optimal safety and effectiveness.

If third-party testing is a priority, Thorne Biotin is NSF Contents Certified, so you can trust you’re getting a high-quality product that’s been independently verified for purity, potency, and label accuracy.

Ritual’s Prenatal Multivitamin is one of the most thoughtfully formulated biotin supplements for women, especially during a life stage when it matters most. While true biotin deficiency is rare, women are at greater risk of deficiencies during pregnancy¹. 

The prenatal offers more than just 150 micrograms of biotin—it includes essential nutrients like folate, iron, B12, iodine, and vitamins D3 and K2. You’ll also get vegan-friendly omega-3 DHA from algae and 55 milligrams of choline² (10% DV) to support fetal brain and neural tube development—Ritual also offers a Pregnancy & Postpartum Protein Shake for a boost of choline.

The formula is Clean Label Project certified, non-GMO, and rigorously screened for heavy metals and microbes. Ingredient traceability is a major plus, though the lack of NSF or Informed Sport certification slightly lowers its formulation and third-party testing scores to (a still solid) 4 out of 5—something to note for competitive athletes or those who prefer extra assurance of taking products without banned substances.

The taste and overall experience are where things become somewhat divisive. The capsules come in Citrus or Mint essences—off-putting for some and pleasant for others. Trying both options, I fall somewhere in the middle; while I don’t find the Citrus totally off-putting, I find the mint much more pleasant and enjoyable. 

Fishy burps, due to the algal oil, are a common complaint, especially if dealing with morning sickness. Swallowing two flavored capsules daily is manageable for most, but challenging for those sensitive to smell. This ultimately gives taste, swallowability, and side effects 3 out of 5 ratings.

Still, many users report increased energy, stronger hair, and healthier nails, making it a great choice for supporting women’s health as they try to conceive or are pregnant. 

Perelel Mom Multi-Support Pack offers a comprehensive, postpartum formula if you’re seeking support after delivery.

At just $0.18 per serving for a potent 10,000 micrograms of biotin, Sports Research offers incredible value. It easily earns a perfect 5 out of 5 for price per serving, but that’s just the start.

Sports Research pairs biotin with organic virgin coconut oil, suggesting it helps enhance absorption. While oils aid the absorption of fat-soluble vitamins (and what we kept in mind when choosing the best vitamin A supplements), little evidence suggests they do the same for water-soluble ones like biotin. Still, with no artificial fillers, the formulation is clean and well-intentioned, earning a solid 4.5 out of 5, with a slight deduction for not being third-party tested.

That said, while several Sports Research products are Informed-Sport certified, this particular one is only certified vegan. That’s plenty of reassurance for most users, but it nudges the third-party testing score down slightly to a 4 out of 5.

The single-serving softgels are small, easy to swallow, and virtually tasteless—earning a perfect 5 out of 5 for both taste and swallowability. Some reviewers mention a faint coconut scent, but it doesn’t seem to affect the overall experience. 

As for side effects, a few users reported mild breakouts, headaches, or a swollen tongue—possibly due to a sensitivity to coconut oil or the high biotin dose. Still, with nearly 96,000 (!!) Amazon reviews and an impressive 4.6-out-of-5 rating, the vast majority of users report positive results, ranging from faster nail growth to reduced hair breakage.

Sports Research also offers a Satisfaction Guarantee and a 45-day return policy on direct website purchases—just note return shipping is on you. Still, that level of support is well-above average, earning customer service a solid 4.5 out of 5.

If you prefer a formulation without coconut oil, Nutricost Biotin Capsules provide 10,000 micrograms of biotin at a budget-friendly price.

Because Thorne is trusted by professionals in the UFC, NBA, and Olympic teams for its rigorous quality standards, its biotin supplement stands out as a top choice for athletes. It carries the NSF Contents Certified stamp, verifying label accuracy and testing for contaminants, earning a perfect 5 out of 5 for third-party testing.

Each capsule packs a solid 8,000 micrograms of bioactive biotin in a clean formula without any artificial fillers. And at just $0.45 per serving, it’s a fantastic value for such a high-quality supplement. As such, we score it at 5 out of 5 for formulation and price.

Taste and swallowability also score high with the small, single capsule earning a perfect 5 out of 5 for being easy to take and free of any unpleasant aftertaste or odor. One Amazon reviewer summed it up perfectly: “Size is very small. Easy to swallow. No odor. Would recommend.” Honestly, I couldn’t agree more—the capsule is tiny, simple to take, and odorless.

As for side effects, I personally experienced no issues and tolerated each serving well. And nearly 1,000 Amazon reviewers back this up with an impressive 4.7-out-of-5 rating. 

While there are some mixed opinions about its effectiveness, this is to be expected, especially considering the use of biotin isn’t a golden ticket to strong nails and healthier hair. Still, 93 percent of users rate it a 4 or higher, suggesting positive user experiences. 

If you’re looking for even more biotin and value, Sports Research Biotin 10,000mcg with Organic Coconut Oil is a trusted pick among athletes and fitness enthusiasts—just be sure to confirm both options are safe for your specific requirements if you’re subject to drug testing.

Because hair struggles often stem from a mix of stress, hormones, and nutrient gaps, biotin alone may not cut it. Nutrafol takes a broader, more clinical approach—targeting root causes with a comprehensive formula backed by published research, making it a top biotin-inclusive pick for hair growth.

Nutrafol Women’s Hair Growth Nutraceutical includes 3,000 micrograms of biotin—lower than some options—but it’s supported by iodine, selenium, and vitamins A, C, D, and E. Its proprietary Synergen Complex and Nutrafol Blend combine stress adaptogens (like ashwagandha), antioxidants (such as curcumin), and DHT-targeting botanicals (like saw palmetto) to address multiple triggers of hair loss.

Yet, the formula isn’t without concerns. It contains proprietary blends, so we don’t know exact ingredient dosages. Some fat-soluble vitamins can be harmful at high levels, too, and while this formula is designed for women aged 18 to 44, certain ingredients (especially botanicals) may not be safe during pregnancy or breastfeeding.

Nutrafol also highlights its clinical research and states that products are manufactured in a GMP-certified, FDA-compliant facility with tested ingredients. However, they don’t share the names of third-party labs or provide Certificates of Analysis (COAs). Due to the lack of transparency and the use of proprietary blends, it receives a rating of 2 out of 5 for third-party testing and formulation.

As for side effects, I didn’t experience any personally, and Nutrafol reports that no adverse effects were found in its trials. However, digestive issues such as nausea or stomach pain are a recurring complaint among some reviewers (and even someone I know), which lowers its side effects rating to 2 out of 5.

User experiences vary widely, but if you’re curious about a comprehensive, research-driven formula—and you’re comfortable with the ingredients and taking four capsules a day—Nutrafol may be worth exploring.

If you like the idea of a unique formula but want a smaller serving size, Pure Encapsulations Biotin Complex Hair & Skin only requires taking one capsule daily.

Pure Encapsulations Biotin Complex Hair & Skin takes the top spot as the best biotin supplement for skin health—and it’s not just because of its potent formula free from common allergens, binders, and preservatives. What really sets it apart is a patented Lustriva®, a patented blend of inositol-stabilized arginine silicate and magnesium biotinate.

So, what makes Lustriva® so intriguing? At its core is arginine silicate inositol (ASI)—a compound better known in the sports nutrition world as Nitrosigine®, found in some of the best stim-free pre-workouts. ASI helps boost arginine (an amino acid) and nitric oxide³ levels, which may enhance blood flow to the skin and other peripheral tissues. 

Better circulation supports nutrient delivery and collagen⁴ synthesis, two factors for improving skin hydration and elasticity. Additionally, pairing ASI with magnesium biotinate may protect against UV-related skin damage⁵ and promote hair and nail growth⁶. 

That said, it’s worth noting that much of the research behind this formula is mostly industry-funded and based on animal studies. And while the formulation is Certified Gluten-Free, it currently lacks third-party certifications for purity and banned substances from organizations like NSF or Informed Choice. All things considered, this supplement earns solid 4-out-of-5 ratings for both formulation and third-party testing. 

But here’s what may seal the deal: at just $0.71 per serving, this supplement nails it on value, earning a 4.5-out-of-5 score in the category. Many Amazon reviewers mention switching from pricier brands and achieving the same (if not better) results, as reflected in its impressive 4.6-star average rating.

Thorne Biotin might be a great choice if you prefer a simpler formula that still delivers high value.

Hers Biotin Multivitamin Gummies earn top marks as the best biotin gummies supplement thanks to their enjoyable taste and well-rounded nutrient profile. Each gummy delivers 300 micrograms of biotin, complemented by “builder” nutrients—like vitamins A, C, D3, E, B6, B12, and folic acid—to synergistically support hair, skin, and nail health.

While thoughtfully designed with bioavailable vitamins, the biotin content is lower than others, and each gummy contains 1 gram of added sugar—low but worth noting if you watch your sugar intake. The lack of independent testing to verify quality and label accuracy (more on this soon) also lowers the overall formulation rating to 2 out of 5.

The added sugar works in the gummies’ favor, though, scoring 5 out of 5 for taste. Most users—myself included—found the cherry flavor pleasant (and not medicinal), and the sugar-coated texture gives it a nice bite.

Swallowability earns a 4 out of 5, as well. The gummy itself is easy to take, but multiple reviews note issues with gummies arriving melted together into a single blob, which makes them harder to separate and ensure a proper dose. I did not experience this issue, though my gummies were delivered in the cooler weather conditions of early spring. 

Hers earns just a 2 out of 5 for third-party testing. The brand states its products are not tested on animals, but there’s no mention of independent testing for quality, safety, or label accuracy. 

Customer service is rated even lower at 1.5 out of 5. While the site includes a help center and contact options, returns aren’t accepted “given the nature of our products,” which can be frustrating, especially if your gummies arrive melted.

Still, if you’re looking for a biotin supplement in gummy form that’s easy to take with an enjoyable taste, this one checks most of the boxes—just be aware of its trade-offs.

If you’re in childbearing years or expecting and don’t mind flavored capsules, Ritual Prenatal Multivitamin is worth considering. 

Perelel’s Mom Multi-Support Pack stands out as the best postpartum supplement thanks to its comprehensive formula featuring a targeted “Beauty Blend” with 30 micrograms of biotin and 500 milligrams of collagen peptides to help combat hair loss and dull skin. While the biotin dose is slightly below the recommended 35 micrograms for breastfeeding women¹, this conservative amount can be a safer approach during nursing.

Beyond beauty, the formula supports a wide range of postpartum needs. It includes essential nutrients like iron, folate, choline, vitamin D, and omega-3s, along with a “cognitive blend” to support heart health, mood, and focus. Some ingredients, such as vitamin A from beta-carotene, are less bioavailable than their preformed forms. However, the formula is thoughtfully designed and clearly labeled.

Perelel claims Clean Label Project certification and rigorous testing for heavy metals, potency, and contaminants. However, the lack of publicly available lab details or Certificates of Analysis lowers its testing score to 3 out of 5. And while the formula is clearly labeled, its purity and safety haven’t been verified by trusted third-party organizations like NSF or Informed Choice, also resulting in a 3-out-of-5 formulation rating.

Taking the pack daily means swallowing five capsules, which can feel overwhelming, especially if you’re a tired new mom. Several customers also mention a fishy taste and smell, though not enough to deter use (and it didn’t affect my own willingness to take them). 

RELATED: Best Protein Powder for Breastfeeding

On the upside, many users report noticeable improvements in mood, energy, and hair and skin health. These mixed experiences translate to scores of 2 out of 5 for swallowability, 3.5 out of 5 for taste, and a perfect 5 out of 5 for minimal side effects.

A final plus? Perelel offers a 30-day refund on your first pack (minus shipping), earning a 4-out-of-5 rating for customer service.

If you prefer a simpler formula with only one capsule, Sports Research Biotin 10,000mcg with Organic Coconut Oil might be a good fit—just be sure to check in with your doctor first, especially if you’re breastfeeding.