Biotin
Compiled from published pharmacological and botanical literature. Not independently verified by Herbuno. Spotted an error or have a correction? Flag it below →
| Compound | Biotin (vitamin B7, formerly vitamin H) |
|---|---|
| Chemical class | Water-soluble bicyclic vitamin — ureido ring fused to a tetrahydrothiophene with a valeric acid side chain |
| CAS | 58-85-5 |
| Primary source | Holy basil leaf (Ocimum tenuiflorum) for botanical grades; chemical synthesis for isolated grades |
| Key applications | Carboxylase cofactor, fatty acid synthesis, gluconeogenesis, keratin infrastructure |
| Claim strength | High for deficiency correction and inherited carboxylase disorders; Emerging for hair and nails in replete individuals |
| Typical form | Botanical concentrate at declared assay, or 1% trituration on a carrier |
| Buy from Herbuno | Biotin 0.5% from Holy Basil Leaf · Liposomal Biotin |
| Origin | Processed / Sourced from India |
| MOQ | R&D 100 g / 250 g (subject to stock) · Pilot batch 1–5 kg · Bulk 10 kg, 25 kg and above |
| Lead Time | Dispatch within 72 hrs from stock · fresh-batch production (typically 50 kg+): 10 working days |
| Documentation | CoA & MSDS standard with every lot; phytosanitary on request |
Name origin: From the Greek bios, life. It was discovered three separate times by three groups working on unrelated problems and named differently each time — biotin, vitamin H from the German Haar und Haut for hair and skin, and coenzyme R. The three were eventually shown to be the same molecule. The German name is the origin of the entire hair-and-skin positioning that dominates the category today, and it came from rat studies, not human trials.
Discovery and production history: The deficiency state was first produced deliberately, by feeding animals raw egg white. Avidin, a glycoprotein in egg white, binds biotin with extraordinary affinity and renders it unabsorbable; animals fed raw egg white developed dermatitis and hair loss that were reversed by a factor in liver. That avidin-biotin bond is now one of the most exploited interactions in laboratory science, used routinely in assays and purification. Industrial biotin production has been by chemical synthesis since the 1940s, with the Sternbach route and its successors.
Research trajectory: Biotin's role as the cofactor for five human carboxylases is settled biochemistry. Frank deficiency is rare, because gut bacteria produce some and dietary sources are widespread, so the research has concentrated on inherited disorders of biotin metabolism, where treatment is dramatic and life-saving, and on the much weaker question of supraphysiological supplementation in healthy people. A separate and more recent literature concerns analytical interference, which emerged only once high-dose supplements became common and began distorting clinical laboratory results.
Commercial source: Most isolated biotin is synthetic, produced through a multi-step route and supplied as a 1% or 2% trituration because the active dose is in micrograms. Botanical biotin is a different category: holy basil and certain other leaves accumulate biotin, and the extract is standardised to a declared percentage, giving a food-matrix vitamin for clean-label positioning. As with other botanical micronutrients, the inclusion rate is far higher than for a synthetic trituration, which has direct consequences for capsule and tablet design.
Evidence for Biotin Applications
The hair and nail claim that drives the entire consumer category is not supported in people who are not deficient, and this should be said plainly. The positive human evidence comes from small, mostly uncontrolled studies in people with brittle nail syndrome or with diagnosed biotin deficiency, and from case reports in inherited metabolic disorders. Systematic reviews examining biotin for hair loss in otherwise healthy individuals have repeatedly concluded that the evidence is inadequate, with most positive reports involving an underlying deficiency that was itself the cause. The vitamin H name came from rat dermatitis studies in the 1930s, and the market has been trading on that name ever since. Claim strength: Emerging, and weak.
Deficiency correction, by contrast, is unambiguous and the presentation is characteristic. Deficiency produces a scaly periorificial dermatitis, alopecia, conjunctivitis and neurological signs, and it resolves on repletion. Risk factors are specific rather than general: prolonged raw egg white consumption through avidin binding, long-term anticonvulsant therapy, chronic alcohol use, and pregnancy, where marginal deficiency is more common than generally assumed. Inherited biotinidase deficiency and holocarboxylase synthetase deficiency are treated with pharmacological biotin and the response is life-changing. Claim strength: High.
Analytical interference is the most important practical fact about high-dose biotin and the one formulators most often do not know. Biotin at supplemental doses interferes with immunoassays that use streptavidin-biotin capture chemistry — which is most of them. The consequences are not trivial: falsely low troponin results can mask a myocardial infarction, and distorted thyroid panels can produce a false picture of Graves disease. The US FDA has issued safety communications on this. Products carrying doses well above nutritional requirement, which describes most of the hair-and-nail category at 5,000 or 10,000 micrograms, should carry guidance to inform clinicians and to pause before blood testing. Claim strength: High.
Biochemically the cofactor role is beyond dispute and worth separating from the marketing. Biotin is covalently bound to five carboxylases that sit at control points in fatty acid synthesis, gluconeogenesis, amino acid catabolism and leucine metabolism. That is why deficiency affects skin and hair at all — keratin-producing tissue has high synthetic demand. But demonstrating that a cofactor is required for a process does not demonstrate that adding more of it accelerates that process in someone who already has enough, which is the inferential leap the category depends on. Claim strength: High for the biochemistry, not for the extrapolation.
No tolerable upper intake level has been set, by EFSA or by the US Institute of Medicine, because no adverse effect has been identified at high intakes. That is a genuine safety point in biotin's favour and it explains why 10,000 microgram products exist at all. It should not be read as an endorsement of those doses. The absence of toxicity is not evidence of benefit, and the assay interference described above is a real-world harm that arises precisely at these doses even though it is not a toxicological effect. Claim strength: High.
Botanical versus synthetic biotin has no comparative human bioavailability data, the same position as other botanical micronutrients in this catalogue. The molecule is identical; what differs is the matrix and the documentation. A holy basil derived biotin can be positioned honestly on clean-label, whole-food and Ayurvedic-heritage grounds, and holy basil carries its own consumer recognition in several markets. It should not be positioned on superior absorption, because that has not been tested. Claim strength: Emerging.
Sourcing biotin from Herbuno. Our botanical grade is Biotin 0.5% from Holy Basil Leaf, standardised to a declared assay, for clean-label and Ayurvedic-positioned formulations. A liposomal biotin powder is available for delivery-format work.
Confirm whether your assay target refers to the extract or to biotin content, since the inclusion rate differs by two orders of magnitude between botanical and synthetic routes. All lots ship with CoA and MSDS as standard; request a quotation for pilot or bulk volumes.
Dosage & Formulator Specification
Biotin is active in micrograms, so the inclusion arithmetic is the first thing to get right. US adequate intake is 30 micrograms daily for adults; EFSA sets 40 micrograms. Consumer supplements routinely carry 5,000 to 10,000 micrograms, which is 150 to 300 times the adequate intake, on no evidential basis beyond the absence of toxicity. A 0.5% botanical extract delivers 5 milligrams of biotin per gram of powder, so a 5,000 microgram dose needs one gram of extract — a full capsule or more. A 1% synthetic trituration delivers 10 milligrams per gram, needing 500 milligrams for the same dose. Neither is a trivial fill.
If you are formulating at nutritional rather than cosmetic doses, the picture changes entirely: 30 to 100 micrograms requires 6 to 20 milligrams of a 0.5% botanical extract, which blends into almost anything. We would encourage formulators to consider whether the high-dose positioning is worth the fill volume, the cost and the assay-interference liability, given that the efficacy evidence at those doses is weak.
Biotin is chemically well behaved in formulation. It is stable to heat and to a wide pH range, more so than most B vitamins, and does not degrade appreciably under normal processing or storage. It is poorly soluble in cold water, which matters for effervescent and ready-to-mix formats but not for capsules or tablets. It has no significant taste at the doses used. The practical formulation risks are therefore uniformity of a very small active in a large blend, and, for botanical grades, the bulk and colour the plant matrix contributes.
For analytical control, specify biotin by HPLC rather than microbiological assay where possible, since the latter is slower and less specific. Require the certificate to state whether the figure is biotin content or extract percentage. For botanical grades, confirm the source species and plant part — Ocimum tenuiflorum leaf in our case — plus extraction solvent and residual solvent limits, since these determine both regulatory classification and clean-label eligibility. India-origin botanical material ships with phytosanitary certification on request alongside CoA and MSDS.
Frequently Asked Questions — Biotin
Does biotin actually grow hair?
Not in people who are not deficient, on the available evidence. Systematic reviews of biotin for hair loss in otherwise healthy individuals have repeatedly found the evidence inadequate; the positive reports generally involve an underlying deficiency that was itself causing the problem. The hair association traces to the old German name vitamin H and to 1930s rat dermatitis studies, not to human trials.
Why do blood tests get distorted by biotin?
Because most clinical immunoassays use streptavidin-biotin capture chemistry, and supplemental biotin competes with it. The consequences are serious: falsely low troponin can mask a heart attack, and distorted thyroid panels can mimic Graves disease. The FDA has issued safety communications on this. Products above nutritional dose should tell users to inform their clinician and pause before blood testing.
If the evidence is weak, why do 10,000 mcg products exist?
Because biotin has no identified toxicity, so no upper limit has been set, and because the vitamin H name has given the category seventy years of momentum. Absence of toxicity is not evidence of benefit. We will supply at whatever assay you specify, but we would rather you knew where the evidence sits before you set the dose.
How much holy basil extract do I need for a 5,000 mcg dose?
One gram. The extract is standardised to 0.5% biotin, so it delivers 5 mg per gram. That is a full capsule or more before any other ingredient. At nutritional doses of 30 to 100 mcg you need only 6 to 20 mg, which blends into anything — so the dose decision drives the whole format decision here.
Is botanical biotin absorbed better than synthetic?
There is no comparative human data, so we will not claim it. The molecule is identical. Position a holy basil biotin on clean-label, whole-food and Ayurvedic-heritage grounds, which are real and defensible, rather than on absorption, which has not been tested.
Why source biotin from India?
Around 80% of raw nutraceutical ingredients originate in China and a qualified second origin is increasingly a continuity requirement. For botanical biotin specifically, holy basil is an Indian crop with established cultivation and an Ayurvedic provenance story that travels well in export markets — so origin here is a positioning asset rather than only a risk-management one.