What Is Biotin?
Biotin is vitamin B7, a water-soluble B-complex vitamin that your body uses as an essential cofactor for five carboxylase enzymes governing fat, glucose, and amino-acid metabolism.[1]Biotin Homeostasis and Carboxylases — Int J Mol Sci (2024) View source Because it is water-soluble, your body does not store large amounts, so a steady daily supply matters. Remedy's Biotin delivers a high-potency 5,000 mcg dose of vitamin B7 in a vegan capsule.
Most healthy adults need only about 30 mcg of biotin per day, so a 5,000 mcg capsule provides a generous, deficiency-correcting amount of this beauty-and-metabolism nutrient.[2]Reference Intake Values for Biotin — Eur J Nutr (2022) View source Biotin is best known for supporting hair, skin, and nails, but its real job is far broader. For the full picture, see our complete evidence-based biotin guide.
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Form: Vitamin B7 (d-biotin), the body-ready form
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Dose: 5,000 mcg per single vegan capsule
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Count: 60 capsules — a 60-day supply at 1 per day
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Free from: fillers, binders, gelatin, and common allergens
Why Choose Remedy's Biotin
Many biotin products bury a small dose inside a sugary gummy or pad capsules with fillers. Remedy's Biotin is a clean, high-potency formula built for people who want a precise, traceable dose with nothing extra.
| What You Get |
Why It Matters |
| 5,000 mcg vitamin B7 per capsule |
High-potency dose proven to correct deficiency; no guessing across multiple gummies |
| Vegan capsule |
No bovine or porcine gelatin — suitable for plant-based and kosher-minded routines |
| No fillers or binders |
Just biotin, so the label reads the way it should |
| Zero added sugar |
Unlike biotin gummies, which often add 2–4 g of sugar per serving |
| Made in the USA, lab-tested |
Third-party testing for identity and purity in every batch |
Compared with gummies that frequently under-dose and add sugar, this single-capsule format makes getting your biotin dose right simple and consistent.
Top Biotin Benefits
Biotin's benefits are strongest when there is a shortfall to correct. In people with low biotin, supplementation supports hair strength, nail firmness, skin health, and normal energy metabolism — the same four areas where most users notice change.[3]Biotin for Hair Loss: Evidence Review — Skin Appendage Disorders (2017) View source
| Benefit Area |
What the Evidence Shows |
Best For |
| Hair |
Supports hair strength and reduces shedding where biotin is low; no clear benefit in already-replete people |
People with a deficiency or risk factor |
| Nails |
63% of brittle-nail patients improved and nail-plate thickness rose ~25% on 2.5 mg/day |
Brittle, splitting fingernails |
| Skin |
Helps maintain healthy skin; severe deficiency causes a scaly rash that resolves with biotin |
Dry or flaky skin tied to low B7 |
| Energy metabolism |
Cofactor for carboxylases that convert food into usable energy |
Everyone — a core metabolic role |
For the deeper dive into where the science is strong and where it is hyped, read what the research actually shows about biotin benefits.
How Biotin Works
Biotin works as a covalently bound cofactor for five carboxylase enzymes that drive gluconeogenesis, fatty-acid synthesis, and amino-acid breakdown.[4]Biotin Popularity vs Clinical Evidence — J Drugs Dermatol (Soleymani 2017) View source When biotin is scarce, these enzymes slow down, and the first visible tissues to suffer are the fastest-dividing ones: hair follicles, nail beds, and skin.
For hair and nails specifically, biotin contributes to keratin infrastructure — the structural protein that makes the hair shaft and nail plate hard and resilient. Restoring adequate biotin restores the raw enzymatic support those keratin-producing cells depend on, which is why deficiency symptoms reverse once levels normalize.
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Carboxylase cofactor — activates 5 key metabolic enzymes
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Keratin support — underpins healthy hair and nail formation
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Energy conversion — helps turn carbs, fats, and protein into fuel
Biotin for Hair
Biotin is the internet's favorite hair vitamin, but the honest read is this: it reliably helps hair when you are low in biotin, and it does little for hair if your levels are already normal.[3]Biotin for Hair Loss: Evidence Review — Skin Appendage Disorders (2017) View source In one study, 38% of women complaining of hair loss had low serum biotin, usually linked to a risk factor rather than diet.[5]Serum Biotin in Women With Hair Loss — Int J Trichology (Trueb 2016) View source
Risk factors that lower biotin include pregnancy, certain anti-seizure medications, heavy alcohol use, and gut conditions that impair absorption. Correcting a real shortfall with a 5,000 mcg daily dose gives follicles the cofactor they need, with most people allowing 90–150 days of consistent use before judging results.
For the full who-it-helps breakdown, see biotin for hair growth and what actually works.
Biotin for Nails and Skin
Nails are where biotin's evidence is strongest. In a classic trial, 63% of people with brittle nails improved on 2.5 mg/day, with nail-plate thickness rising about 25%.[6]Brittle Nails Respond to Daily Biotin — Cutis (Hochman 1993) View source Scanning electron microscopy confirmed firmer, less-splitting nails after supplementation.[7]Biotin Strengthens Brittle Fingernails — J Am Acad Dermatol (Colombo 1990) View source
For skin, biotin supports a healthy barrier, and a frank scaly rash around the eyes, nose, and mouth is a hallmark of true deficiency that resolves once biotin is replaced. Skin and nail turnover is slow, so plan on at least 2–3 months of daily use.
Dig deeper into the mechanisms and timelines in our guide to biotin for nails and skin.
Biotin Deficiency
Overt biotin deficiency is uncommon, but marginal shortfalls happen more than people realize, especially in pregnancy where deficiency is both common and teratogenic in animal models.[8]Marginal Biotin Deficiency in Pregnancy — J Nutr (Mock 2009) View source Telltale signs include thinning hair, brittle nails, a scaly facial rash, and fatigue.
| Sign or Cause |
What's Happening |
| Thinning, shedding hair |
Follicles lose carboxylase support first |
| Brittle, splitting nails |
Weakened keratin in the nail plate |
| Scaly rash around face |
Classic deficiency dermatitis |
| Raw egg-white habit |
Avidin binds biotin; cooking denatures it |
| Anti-seizure meds / heavy alcohol |
Lower biotin status over time |
If several of these apply to you, our biotin deficiency signs and causes guide walks through who should check iron and thyroid first.
How Much Biotin to Take
The adult Adequate Intake is just 30 mcg/day, while supplements like ours supply 5,000 mcg — a generous amount that safely corrects shortfalls because biotin is water-soluble with no established upper limit.[2]Reference Intake Values for Biotin — Eur J Nutr (2022) View source One capsule daily is the standard for hair, skin, and nail support.
| Goal |
Typical Dose |
Timing |
Duration |
| Hair, skin & nail support |
5,000 mcg (1 capsule) |
Any time, with or without food |
90–150 days minimum |
| Brittle nails |
2,500–5,000 mcg daily |
Morning routine |
3–6 months |
| General B7 top-up |
5,000 mcg, 1 capsule |
With breakfast |
Ongoing |
Even at very high pharmaceutical doses (300 mg/day) studied for other conditions, biotin showed no consistent benefit beyond correcting a deficiency, so more is not better.[9]High-Dose Biotin Trials in MS — Mult Scler Relat Disord (2021) View source See full biotin dosage and timing details.
Side Effects and Lab-Test Interference
Biotin is remarkably well tolerated, with no established toxic dose. Its one clinically important caveat is lab-test interference: high-dose biotin can skew immunoassays, distorting thyroid, hormone, and troponin results.[10]Biotin Skews Hormone and Troponin Assays — JAMA (Li 2017) View source
| Test Affected |
Risk |
What to Do |
| Thyroid panel (TSH, free T4) |
Can mimic a Graves'-pattern result |
Pause biotin and tell your lab |
| Cardiac troponin |
Can read falsely low, masking a heart attack |
Disclose biotin use in the ER |
| Hormone immunoassays |
Falsely high or low values |
Pause 2–3 days before testing |
Most labs advise pausing high-dose biotin for 2–3 days before bloodwork and disclosing use.[11]Mitigating Biotin Assay Interference — Endocrine Practice (Samarasinghe 2017) View source The full safety story is in our biotin side effects and lab-test interference guide.
Who Should Not Take Biotin
Biotin is safe for most adults, but a few groups should be cautious. Anyone scheduled for thyroid or cardiac bloodwork should pause high-dose biotin for 2–3 days first to avoid misleading results. The interference is dose-dependent and reversible once biotin clears.
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Before bloodwork: pause 2–3 days and tell your provider
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Pregnant or breastfeeding: consult your doctor before high-dose use
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On anticonvulsants: these can lower biotin — discuss monitoring
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Children: use only under pediatric guidance
If none of these apply, a single 5,000 mcg capsule daily is an appropriate, well-tolerated dose.
Biotin vs Collagen
Biotin and collagen are often pitched as rivals, but they do different jobs. Biotin is a metabolic cofactor that helps your body build keratin, while collagen is a structural protein you supply directly — a tool versus a building material.
| Feature |
Biotin (B7) |
Collagen |
| Role |
Enzyme cofactor for keratin |
Structural protein for hair, skin, joints |
| Our dose |
5,000 mcg vitamin B7 |
1,000 mg Type II collagen |
| Best for |
Correcting a B7 shortfall |
Adding structural protein |
| Stack together? |
Yes — cofactor plus building block target hair and nails from two angles |
Because they work on different parts of the same goal, many people pair Remedy's Biotin with our Type II Collagen 1000 mg. Full comparison: biotin vs collagen and stacking for hair.
What's in the Bottle
Every bottle holds 60 vegan capsules, each delivering exactly 5,000 mcg of vitamin B7 (d-biotin) and nothing else of consequence — no fillers, no binders, no gelatin, and no added sugar. At one capsule per day, a single bottle is a 60-day supply.
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60 vegan capsules per bottle
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5,000 mcg biotin (B7) per capsule
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0 g added sugar — unlike gummies
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Made in the USA, third-party lab-tested
This clean, single-ingredient design is what makes it easy to know exactly how much biotin you take each day.
Frequently Asked Questions
How much biotin is in each capsule? +
Each Remedy's vegan capsule delivers 5,000 mcg of vitamin B7 (biotin). That is well above the 30 mcg adult Adequate Intake, providing a generous, deficiency-correcting dose. One capsule daily is the standard serving, making a 60-capsule bottle a 60-day supply.
How long until biotin works for hair? +
Hair grows slowly, so allow 90 to 150 days of daily use before judging results. Biotin helps most in people who are actually low in B7; if your levels are already normal, do not expect dramatic regrowth. Consistency over 3 to 5 months matters more than dose.
Does biotin really work for nails? +
Yes, nails are biotin's strongest evidence. In one trial, 63% of people with brittle nails improved on 2.5 mg/day, with nail thickness rising about 25%. Plan on 3 to 6 months of daily 5,000 mcg use, since nail growth is slow and gradual.
Is 5,000 mcg of biotin too much? +
No. Biotin is water-soluble with no established upper limit, and 5,000 mcg is a common, well-tolerated supplemental dose. The main caveat is lab-test interference, so pause it 2 to 3 days before thyroid or cardiac bloodwork. Excess biotin is simply excreted in urine.
Can biotin affect my blood tests? +
Yes. High-dose biotin can skew immunoassays, distorting thyroid, hormone, and troponin results. A 2017 JAMA study confirmed this at 10 mg/day. Pause biotin for 2 to 3 days before bloodwork and tell your provider you take it, especially before cardiac testing.
Should I take biotin with food? +
You can take biotin with or without food, since absorption does not depend on meals. Many people take 1 capsule with breakfast simply to build a consistent habit. The most important factor is taking it daily for at least 90 days to see hair and nail results.
Is this biotin vegan and free of fillers? +
Yes. Remedy's Biotin uses a vegan capsule with no gelatin, no fillers, no binders, and 0 g added sugar. It is made in the USA and third-party lab-tested. Each of the 60 capsules contains only 5,000 mcg of vitamin B7 and the vegan capsule shell.
Can I take biotin and collagen together? +
Yes, they complement each other. Biotin (5,000 mcg) is a cofactor your body uses to build keratin, while Type II Collagen (1,000 mg) supplies structural protein directly. Stacking them targets hair and nails from two angles, and there is no known interaction between the two.
What are the signs I need biotin? +
Common signs of low biotin include thinning hair, brittle splitting nails, a scaly rash around the face, and fatigue. Risk factors include pregnancy, heavy alcohol use, anti-seizure medications, and frequent raw egg-white intake. If 2 or more apply, a 5,000 mcg daily dose may help.
Does eating raw eggs cause biotin deficiency? +
It can. Raw egg whites contain avidin, a protein that binds biotin and blocks absorption. Cooking denatures avidin, so cooked eggs are safe and even supply biotin (about 10 mcg each). Regularly eating many raw whites over weeks is the classic dietary cause of deficiency.
Can I take biotin during pregnancy? +
Marginal biotin deficiency is common in pregnancy, so adequate biotin matters, but high-dose supplements should be cleared with your doctor first. Most prenatal vitamins already include around 30 mcg of biotin. Always confirm a 5,000 mcg dose with your provider before use while pregnant or breastfeeding.
How is capsule biotin different from gummies? +
Our capsule delivers a precise 5,000 mcg with 0 g added sugar, while gummies often add 2 to 4 g of sugar per serving and under-dose. Capsules also avoid the fillers and gelatin common in chewables, giving you an exact daily dose in one clean vegan capsule.
How long does one bottle last? +
At the standard 1 capsule per day, one 60-capsule bottle lasts 60 days. Since hair and nail benefits need 90 to 150 days of consistent use, most people plan for 2 to 3 bottles to evaluate results fully. A subscription keeps daily use uninterrupted.
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