Thorne Biotin 8000 mcg Review
THORNE Biotin, 8 mg Vitamin B7 Supplement, 60 Capsules is listed on Amazon and sold by Pattern and shipped by Amazon. The product is a capsule with an unflavored profile and is positioned as a biotin supplement for adults. The Item details list Brand THORNE, Item Form Capsule, Primary Supplement Type Biotin, Diet Type Gluten Free, Flavor Unflavored, Product Benefits Skin, Hair and Nails and Foundational Health, Specific Uses For Product Hair and Skin, and Unit Count 60 Count. The listing states the product supports healthy hair, nails, skin and metabolism, supports nerve health, and is gluten, dairy and soy free and NSF Contents Certified. The About this item section says it provides support for dry, brittle nails, helps support healthy metabolism, and supports healthy skin and hair. It also says the product has been third-party tested and certified to verify that what is in the package matches what is on the label. The listing describes Thorne as trusted by 100 plus professional sports teams and as the number one most recommended clinical brand by consumers and health-care practitioners, based on a 2026 independent survey of US supplement consumers and health-care practitioners. The allergen information lists barley free, dairy free, egg free, gluten free, rye free, soy free and wheat free. The item weighs 0.02 kg and measures 1.7 x 1.7 x 2.97 inches. The Amazon Best Sellers Rank is 6,799 in Health and Household, 36 in Vitamin B7 Biotin Supplements, and 632 in Diet and Sports Nutrition. The page lists the ASIN as B0797CG5R8 and the UPC as 693749118022. The safety information notes tamper evident packaging and instructs use only if the bottle is sealed and to store tightly. The page shows a one-time price of $28.00, or $0.47 per count, and a Subscribe and Save price of $26.60, with a further 10 percent savings option at $25.20. The item is non-returnable due to food safety reasons, though damaged or defective items may be refunded or replaced. An Amazon's Choice badge appears, and the listing reports 5K plus bought in the past month. The product is sold as one bottle of 60 capsules. Frequently bought together items on the page include THORNE Vitamin D-5,000 and THORNE Magnesium Glycinate, while related listings include Pure Encapsulations Biotin 8 mg and Sports Research Biotin 10,000 mcg. These are separate products and are not part of this listing.
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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 16 mg of biotin a day, well above the 1.25 mg that worked in the main trial. In a randomized trial of 105 adults, 1.25 mg of plant-derived biotin daily for 90 days reduced hair fall and sped hair growth, and also improved nails and skin elasticity, with no side effects reported [1]. In 50 people with diffuse hair loss, six weekly biotin injections with another vitamin reduced hair fall and increased density, but there was no placebo group, and injections differ from capsules [2]. In small case reports, 10 mg of biotin daily cleared hair loss within about 3 months in children taking a seizure medicine [3][4]. A study of a multi-ingredient supplement containing biotin found less hair loss and better density over 12 weeks, but it had other nutrients and no comparison group [5]. Not every study agrees: among 156 women after weight-loss surgery, 1000 micrograms of biotin daily for 3 months helped only about a quarter of those low in biotin, with no clear difference from those who were not low [6]. Overall, the best support is one randomized trial, with most other evidence coming from small or uncontrolled studies. 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 Only1,421 reviews · 94% positive
This summary is based on reviews on iHerb. I didn't retrieve reviews from other retailers, so it reflects one source. Customers who describe results most often mention hair and nails. Many say their hair feels stronger, seems to grow faster and sheds less. Many also say their nails are less brittle and stronger. Several say it works better than other biotin brands they had tried. Reviewers often say the results are not immediate. They usually report noticing changes after about three to four weeks, and sometimes after a few months, so patience is a recurring theme. Quality and trust in the brand come up very often. Reviewers describe Thorne as a brand they buy repeatedly because they consider it pure and reliable, and they mention the quality of the formula and the clean packaging. Many like the capsules themselves. They call them tiny and easy to swallow, with no smell or taste. Several also say they are gentle on the stomach, which sets them apart from supplements that cause nausea. Reviewers also raise some side effects and cautions. One reviewer said they expected biotin to clog sebaceous glands but did not see that effect. This suggests breakouts are a known worry among users. Other reviewers advise people with thyroid conditions, or people taking high doses of supplements, to check with a doctor first. This reflects the awareness of biotin's interference with lab tests. Some reviewers add their own health theories, such as biotin depletion from mold exposure. These claims are anecdotal and not established. Customers worldwide write short, positive reviews. They come from places such as the UK and Malaysia, and many are marked as verified purchases. Many of these focus on good service, safe delivery and repeat purchases rather than on the product's effects. Negative feedback is rare in what I retrieved. Most dissatisfaction seems to be about results being slow, or absent for some people. I did not find specific complaints about price, pill size or taste in the pages I read. A fuller picture of negative feedback would need more review sources.
Biohacker Summary
Members Only6 of 10 recommend it
The panel is split on biotin, the main ingredient here, though most of the ten who spoke see some value for hair, skin and nails. Several recommend it for hair growth and strength, a few also mention blood sugar and insulin resistance, and two said they take it themselves, one about twice a week, while another takes a high amount because of his genes and says others may not need that much. The strongest caution, raised by about half the panel, is that biotin can throw off blood test results, including hormone and thyroid tests, so they advise stopping it for a few days to a week beforehand. Others call it overhyped, say it will not fix hair loss alone, or say protein matters more, and one finds the idea of needing to supplement it silly. No one gave a preferred form or named a supplement to pair it with, though food sources like eggs, almonds, salmon and organ meats came up, and one noted a deficiency risk on a carnivore diet.
See all 10 biohackers →Hide the biohackers
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.
Dave Asprey · Biotin · neutral
- 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.
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
A randomized trial of 105 adults found biotin reduced hair fall and sped hair growth, most human studies showed improvement, and 94% of 1421 reviews are positive, which meets the tier 2 rule.
Where the evidence disagrees: 3 of the 13 human studies found no effect.
More Details
Members OnlyBody systems · Combine with · Possible side effects
Body systems: Skin, hair and nails
Combine with: For hair support, biotin pairs well with zinc, iron (only if ferritin is low), vitamin D, and collagen peptides with vitamin C. Silica or horsetail and saw palmetto may also help in some people, depending on the cause of hair thinning. Keep in mind that high-dose biotin can interfere with lab tests, including thyroid panels and troponin, so stop it about 2 to 3 days before bloodwork and tell your clinician you take it. If the real goal is cellular and DNA repair, look at products built for it, such as NAD+ precursors (NMN or nicotinamide riboside), CoQ10 or ubiquinol, alpha-lipoic acid, resveratrol or pterostilbene, and a methylated B-complex with folate and B12.
Possible side effects: The studies reported no side effects. Reviewers mention worry about skin breakouts and advise checking with a doctor because biotin can interfere with lab tests, especially thyroid tests.
Supplement Facts
Biotin 8 mg
| Biotin | 8 mg |
Other ingredients: Microcrystalline Cellulose, Hypromellose, Calcium Laurate, Silicon Dioxide.
Directions: Suggested use: Take 1 capsule one to two times daily or as recommended by your health-care practitioner.
Barcode (UPC) 693749118022 · Label source: NIH label database · Report a label change
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