Nutricost Biotin 10,000 mcg Review
The Nutricost Biotin Capsules listing presents Biotin (Vitamin B7) in a 240 capsule bottle, with the product details stating 240 Capsules With 10000 MCG Of High Quality Biotin Per Capsule. The page describes the product as offering up to an 8 month (240 day) supply, with one serving being just one capsule. Biotin is also described as Vitamin B7, also known as Vitamin H. The page states that Nutricost Biotin is Non-GMO, Gluten Free, and 3rd Party Tested, and that it is made in a GMP Compliant, FDA Registered Facility. A 120 capsule size is also offered in the size selector, and a 240 capsule size is shown as the selected option on this page. The page lists a regular one-time price of $11.97, with a subscription option that saves up to 20 percent, shown as a discounted price of $9.58, with delivery every 30 days, 2 months, or 4 months. The page notes HSA/FSA eligibility for qualified customers. The page also lists a 60-Day Money Back Guarantee on all orders, under which Nutricost states it will refund 100% of the purchase price minus shipping and handling if a customer is not completely satisfied, while acknowledging that no supplement works for everyone. Shipping terms state orders are usually processed within 1 to 2 business days, with shipment typically received within 3 to 5 business days, and international customers are responsible for duties, taxes, and customs fees. Returns are accepted 60 days after order date, and free unlimited returns for store credit or exchanges are mentioned, with a $2.98 option for free returns for store credit plus exchange protection. Nutricost states its products are made in the USA using globally sourced ingredients in a GMP-compliant facility. The company says products are tested by an independent, accredited lab to help verify that what is on the label is what is in the bottle. The page describes Nutricost's approach as focusing on quality ingredients, clear labeling, and prices without unnecessary fillers. Customer service can be reached by phone or at support@nutricost.com. Related products shown include Biotin Softgels at 5000 IU and Biotin for Women at 10,000 mcg in 120 capsules.
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Study, Trial or Testing Result Summary
Members Only13 human studies · 10 improved
1 of these 13 human studies gave biotin by injection, not by mouth.
This product gives 10,000 micrograms of biotin a day, well above the 1.25 milligrams that helped in the main trial, so it counts as a full dose. In a 2025 randomized trial of 105 adults, 1.25 milligrams of plant-derived biotin daily for 90 days reduced hair fall, sped hair growth and improved nails and skin elasticity, with no side effects reported [1]. A 2022 trial in 50 people with diffuse hair loss found that weekly biotin injections with another vitamin reduced hair fall and increased density, but it had no placebo group and used injections, not capsules [2]. In small case reports, 10 milligrams of biotin daily cleared hair loss within about 3 months in children taking a seizure medicine [3][4]. An open study of a multi-ingredient product containing biotin reported less hair loss and better density over 12 weeks, but it had no control group and other nutrients were involved [5]. Not all results agree: among 156 women after weight-loss surgery, 1,000 micrograms of biotin daily for 3 months gave little benefit, with only 23 percent of those low in biotin reporting clearly less hair loss [6]. Animal and cell studies are never counted.
See all 13 studies →Hide the studies
- In 105 adults (97 finished) taking 1.25 mg of plant-derived biotin daily for 90 days, hair fall dropped, hair grew faster by about 0.55 mm a day, and nails and skin elasticity improved, with no side effects reported.The Role of Sesbania grandiflora-Derived Biotin and Bambusa arundinacea-Derived Silica Extracts in Promoting Hair, Skin,…
- In 50 people with diffuse hair loss, six weekly injections of 5 mg biotin with dexpanthenol from either of two brands reduced hair fall and increased hair density, with no placebo group for comparison.Efficacy of intramuscular injections of biotin and dexpanthenol in the treatment of diffuse hair loss: A randomized, dou…
- In women with temporary diffuse hair loss, 180 days of a multi-nutrient supplement that included biotin improved hair loss, volume and density, and did so more fully than a different supplement, but the biotin dose was not stated and there was no placebo group.Comparative evaluation between two nutritional supplements in the improvement of telogen effluvium.
- In 112 people with light diffuse hair loss taking a supplement containing biotin for 12 weeks, hair loss fell by 59% and hair density rose, with 90% of participants perceiving better hair growth and appearance, in an open-label study without a control group.Effectiveness, Tolerability, and Acceptance of a Food Supplement in the Management of Non-Illness-Related Hair Loss and …
- In newborn screening of 246 infants with biotinidase deficiency in Ontario, two children who stopped biotin developed hair loss, along with abnormal gait, skin rashes and developmental delay.Biotinidase deficiency: Spectrum of molecular, enzymatic and clinical information from newborn screening Ontario, Canada…
- Among 156 women who had sleeve gastrectomy, 1000 mcg of biotin daily for 3 months gave little benefit: only 5 of 22 women with biotin deficiency (23%) reported a clear reduction in hair loss, with no significant difference compared with those without deficiency.Hair Loss After Sleeve Gastrectomy and Effect of Biotin Supplements.
- In children on valproic acid, hair loss and skin rash improved after daily oral biotin 10 mg, which was given as a supplement to patients with low biotinidase activity.Low serum biotinidase activity in children with valproic acid monotherapy.
- Infants fed only hydrolysate formula, which contained little biotin, had low blood biotin, and one of them developed hair loss linked to biotin deficiency.Low serum biotin in Japanese children fed with hydrolysate formula.
- In a review of 25 children with short anagen syndrome, a condition where hair does not grow long, biotin alone or with topical minoxidil was reported to be an effective treatment.Short anagen syndrome: A case series and algorithm for diagnosis.
- In five men with male pattern hair loss, a topical solution containing 0.2% biotin along with minoxidil and a med was judged successful for all five over 6 months, with moderately thicker hair and higher hair density in photographs.Read the study on PubMed (32023218) →
- In a study of children taking valproic acid, three girls who lost hair had their hair loss disappear within about 3 months of taking 10 mg of biotin daily.Serum biotinidase activity in children treated with valproic acid and carbamazepine.
- Three children with valproic acid-related hair loss and normal blood biotin levels had their alopecia resolve within 3 months of taking 10 mg of oral biotin daily.The influence of valproic acid and carbamazepine treatment on serum biotin and zinc levels and on biotinidase activity.
- In a family study of people with partial biotinidase deficiency, one child who was not initially given biotin developed hair loss, hypotonia and a skin rash, and these resolved after biotin therapy; the abstract does not give the dose or duration.Partial biotinidase deficiency: clinical and biochemical features.
Review Totals and Summary
Members Only21,151 reviews · 93% positive
Nutricost Biotin 10,000 mcg has received widespread positive feedback, accumulating approximately 21151 ratings across various retail platforms. An impressive 93% of these ratings are 4 or 5 stars, reflecting a high level of customer satisfaction with the product. **What Buyers Say It Did For Them** Many customers report significant improvements in their hair, nails, and skin. For hair, users frequently mention increased thickness, reduced thinning, and overall healthier appearance. Comments include "significant improvements in hair thickness" and "Fuller hair!". Nails are often described as stronger, with some noticing "big improvement on my nails" and even the disappearance of ridges. Skin benefits, such as "a bit more skin brightness," are also noted by some users. The product is seen as a "game-changer" for many seeking these aesthetic enhancements. **Complaints** The primary concern raised by a customer relates to an ingredient. One reviewer expressed disappointment upon discovering the product "contains titanium dioxide," an ingredient commonly found in sunscreens, leading them to discard the product. Beyond this specific ingredient concern, there are no other notable complaints regarding the product's effectiveness or adverse effects mentioned in the feedback. **Taste, Smell, Pill Size, and Form** The capsules are generally well-received for their ease of consumption. Many reviewers highlight that the product has "no taste" and a "neutral" smell. The pills are often described as "pretty small and easy to swallow." However, one review noted that the "Tablet size is large," suggesting that swallowing with water might be necessary for some, though the majority find them easy to take. The product comes in capsule form. **Value for Money** Customers frequently praise Nutricost Biotin 10,000 mcg for its excellent value. It is consistently described as having a "great price" and offering a "generous supply." The packaging, often containing 240 capsules, is appreciated for lasting a long time, making it a "good size to buy" and providing good value over time. **Who It Seems To Suit and Who It Did Not** This biotin supplement appears to be highly suitable for individuals looking to improve the strength and appearance of their hair, nails, and skin. It is particularly favored by those experiencing thinning hair or hair loss, with one user noting, "my hair is thin and has been falling out... so far so good." It also appeals to those seeking a high-potency biotin dose. Conversely, it did not suit a customer who has a strong aversion to titanium dioxide as an ingredient in supplements.
Biohacker Summary
Members Only6 of 10 recommend it
Biotin is the only ingredient here, and the panel is split but leans toward cautious support. Four of the ten recommend it, mainly for hair, skin and nails, with some also citing blood sugar and insulin resistance, while two take it themselves for hair and nails (one about twice a week) and one takes a high amount but says others may not need it. Several voices push back: one calls it overhyped and thinks enough protein matters more, and another says it will not fix pattern hair loss alone, though it can strengthen existing hairs and should be paired with other treatments. The strongest shared caution is that biotin can distort blood test results for hormones and thyroid, so four panelists say to stop taking it for at least a few days, up to a week, before lab work. They name food sources such as eggs, almonds, salmon and organ meats, and one notes that people on a carnivore diet may run low, but no one gives a preferred form or a dose for this product.
See all 10 biohackers →Hide the biohackers
Dave Asprey · Biotin · warns
- Mentions that most places put in extra biotin for hair growth, suggesting it's not always necessary or beneficial.
- States that biotin clears out oxalates.
- Lists biotin as an important nutrient for hair health.
- Warns against taking biotin for a substantial period of time before lab testing, especially expensive immune stuff, because it will make results insane and doctors will think you're dying.
- Takes more biotin than others' genetics probably need.
- Takes excessive amounts of biotin due to his genetics, but warns that others may not need the same amount.
- Takes a substantial amount of biotin, believing it helps with oxalate removal, and noticed oxalate detoxing issues like deep pimples when increasing his dose.
- Warns that more people will be harmed by 20 milligrams of biotin a day than will be helped, and he himself developed significant neurological problems from taking 10 milligrams of biotin a day for five weeks.
- Dave's guest mentions that people looking to support their hair often turn to biotin.
- Dave personally takes 20-30 milligrams of biotin, initially for hair growth, and found that after an initial period of 'deep skin things' (dumping symptoms), he now does well on this dose, suggesting it helps with oxalate issues.
Dr. Eric Berg · Biotin · neutral
- States that thinning hair often indicates low biotin, which is required to produce keratin for hair, skin, and nails.
- Notes that fungus on nails, identifiable by yellowish discoloration, is an indication of low biotin due to an imbalance in the gut.
- Dr. Berg mentions that fermented dairy contains vital nutrients, including biotin.
- Dr. Eric Berg recommends biotin as a home remedy to help prevent hair loss and regrow hair.
- Mentions that fermented dairy provides vital nutrients such as biotin.
- Emphasizes that biotin is a vital cofactor for collagen absorption and function.
- States that brittle nails are usually caused by a biotin deficiency.
- Recommends getting biotin from a food source rather than a supplement for hair growth.
- Recommends biotin for hair growth, stating it is necessary to make keratin, which improves the hair shaft, makes it strong, and prevents thinning, fragility, and breakage.
- Suggests increasing biotin with a supplement if one has a biotin deficiency.
Thomas DeLauer · Biotin · warns
- Thinks biotin is a little overhyped, suggesting that consuming adequate protein is probably more effective for hair, skin, and nails. He notes that some people might be deficient, especially if consuming a lot of eggs with avidin, but doesn't consider it the 'Mecca of perfect hair'.
- Recommends ensuring sufficient biotin intake, either through diet or supplementation, if hair and nail health is the focus, as it acts as a co-factor for collagen to organize into robust matrixes.
- Takes biotin because her hair had stopped growing for a year, and it has helped her hair grow again.
- Highlights Vitamin B7, or biotin, as beneficial for hair, skin, and nails, but emphasizes its importance for high blood sugar and carb metabolism by increasing insulin receptor sensitivity and glucose tolerance.
- Explains that vitamin B7, also known as biotin, is important for controlling high blood sugar, which plays a role in fat accumulation.
- Warns that 16,000% of the daily value of biotin is overkill and the body will not utilize that much.
- Discusses a Youtheory hair, skin, and nail formula with collagen and biotin, noting that while it's not bad for the price, a powdered supplement form would likely be better.
- States that biotin is super important for synthesizing collagen and is good for hair, skin, and nails.
Andrew Huberman · Biotin · neutral
- Mentions biotin.
- Discusses biotin-enriched shampoos as a potential way to offset dryness and brittleness from ketoconazole, noting that while sufficient biotin is important, it's unclear if these shampoos significantly enhance biotin incorporation into hair.
Siim Land · Biotin · neutral
- Siim Land's company has published papers and filed patents for improvement in mitochondria in the skin using their core mitochondrial approach and other things like biotin.
- Mentions biotin as a nutraceutical with anti-thrombotic potential, increasing cyclic GMP.
- Recommends Biotin (Vitamin B7) for maintaining youthful skin, hair, and nails.
Dr. Rhonda Patrick · Biotin · warns
- Advises avoiding biotin-containing supplements before a testosterone blood test as they can cross-detect with estrogens and confound results.
- She occasionally uses biotin for hair and nails, meaning about twice a week.
Peter Attia · Biotin · warns
- Warns that biotin, found in many supplements, can completely obscure findings and render a non-LCMS test for estradiol and testosterone irrelevant due to interference with ELISA-based assays.
- Advises that if taking a biotin supplement, one should discontinue it for at least a few days, if not a week, before a blood test, as it can dramatically skew thyroid values.
- Warns that certain things, like biotin, should not be taken before a blood test because they can mess up readings.
- Finds it silly to suggest that one needs to supplement biotin levels.
- Warns that biotin alone will not substantially improve female or male pattern hair loss, but it can make existing hairs stronger and needs to be coupled with other effective treatments.
Ben Greenfield · Biotin · recommends
- Recommends biotin (Vitamin B7) for supporting keratin production and strengthening hair, noting it can be found in eggs, almonds, and salmon.
- Warns that biotin could mess with a blood test and make certain lab tests unreliable if used leading up to the test.
- Warns of biotin deficiency on a carnivore diet, as it is low in meat but found in organ meats like liver, heart, kidney, and thymus glands.
- Notes that Kino Octane contains biotin and mentions that some men deficient in biotin notice a bump in testosterone when taking it.
- Mentions that the individual's microbes are producing good vitamins, including thiamine, biotin, and menaquinone (vitamin K2).
- Lists Biotin as a micro-nutrient that, if deficient, can hinder fat loss.
- Mentions biotin as one of the most significant micronutrients whose deficiency can prevent fat loss.
- Notes that the user has a lower likelihood of gut bacteria producing biotin, which can be found in foods like nuts and seeds.
- Used to consider taking enough Biotin for postpartum hair loss, but realized it was a hormonal issue that settled down on its own.
- Recommends biotin as a foundational nutrient for healthy methylation.
Dr. Mark Hyman · Biotin · recommends
- Recommends supplementing with biotin for hair follicle health and growth.
- Includes biotin as part of the IV drip protocol for detoxification.
- Mentions biotin as one of many nutrients that can be helpful for insulin resistance.
- Recommends biotin as helpful for insulin resistance and regulating blood sugar.
- Notes that biotin was among the compounds identified to regulate inflammation in a clinical trial.
- States that biotin is critical for regulating blood sugar.
- Notes that biotin can play a big role in hair loss, as it's made by gut bacteria, so a poor microbiome might lead to insufficient biotin production.
- Recommends ensuring adequate intake of biotin (B7), found in organ meats, for healthy hair, skin, and nails, noting that gut bacteria also produce it.
- States that biotin can be helpful for some people with hair problems, especially when biotin levels are low, which can lead to breaking hair and nails.
- Dr. Hyman mentions biotin as an important nutrient for hair and nails, noting that low levels can lead to breaking hair and nails, and it is produced by gut bacteria.
Bryan Johnson · Biotin · neutral
- Mentions biotin as an example of an ingredient that AG1 lists with a specific dose, but then contrasts it with other ingredients in proprietary blends where doses are not disclosed.
- Recommends adequate Biotin (Vitamin B7) for hair health, noting it is in the Blueprint stack.
RAL Summary
Members OnlyTier 2 for Hair Growth
More Details
Members OnlyBody systems · Combine with · Possible side effects
Body systems: Skin, hair and nails
Combine with: For enhanced hair health, consider combining Biotin with Collagen, which provides essential amino acids for hair structure. Silica can further strengthen hair strands, while a comprehensive multivitamin with minerals like Zinc, Iron, and Selenium supports overall hair growth and prevents deficiencies. Omega-3 fatty acids are beneficial for scalp health, and MSM (Methylsulfonylmethane) offers sulfur, a key component of keratin. Additionally, Vitamin C aids in collagen synthesis and iron absorption, both crucial for healthy hair.
Possible side effects: The studies reported no side effects; a few customers reported stomach discomfort.
Supplement Facts
Biotin 10000 mcg
| Biotin | 10,000 mcg | 33,333% |
Other ingredients: Rice flour, hypromellose (cellulose) capsule.
Directions: As a dietary supplement, take 1 capsule daily with 8-12 oz of water or as directed by your healthcare professional.
Label source: Vitacost · Report a label change
Sizes and barcodes: 240 Capsules, UPC 8 10014 67526 8 (on market); 240 Capsule(s), UPC 7 02669 93166 3 (off market)
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