Biotin

Single-ingredient biotin reference formula at 5 mg per serving, developed as a capsule, tablet or softgel.

Biotin is a reference formula for brands building a single-ingredient biotin product at a default amount of 5 mg (5,000 mcg) per serving. D-biotin is the only active ingredient, so the development work centers on a milligram-level active in a small fill: blend uniformity, premix design and the content assay.

Capsule is the lead format because a premix of D-biotin on a carrier blends into a standard fill, while the tablet uses the same premix with a compression system and the softgel suspends the active in an oil base. The 5 mg default sits beside 1, 2.5 and 10 mg options built on the same formula structure.

Ingredient Composition

Ingredient	Per Serving	Raw Material Form	Alternative Form (same amount of active)
Biotin	5 mg (default amount)	D-biotin, as pure powder or as a premix on a carrier; specification 5 mg D-biotin per serving	Premix at a different dilution, or a micronized grade for oil suspension; the input is recalculated to 5 mg of D-biotin

Amounts are stated as mg of D-biotin (C10H16N2O3S, 244.31 g/mol; PubChem CID 171548); 5 mg equals 5,000 mcg. Biotin is the free vitamin, so no salt or hydrate conversion applies; a premix is calculated back to the same D-biotin amount using its assay.

Intended Benefits & Formula Rationale

This formula is designed for products positioned around daily biotin intake and hair and nail nutrition. Biotin is included as the single active so that the amount, the premix and the excipient system can be set without interaction with other actives.

Intended Benefit Direction	Key Ingredients	Formulation Rationale
Daily biotin intake	Biotin	Included as an essential B vitamin; a review notes that frank deficiency is rare while marginal biotin deficiency occurs in a substantial proportion of women during normal pregnancy [1]. Evidence: Referenced
Hair and nail nutrition	Biotin	Positioned around hair and nail nutrition; a review of 18 reported cases found clinical improvement in patients with an underlying pathology, and concluded that evidence for supplementation in healthy individuals is limited [2]. Evidence: Mixed

One vitamin at one stated amount keeps the specification short. The amounts considered (1 to 10 mg) are well above microgram-level nutritional intakes, so the amount tier is a decision for the brand and its target market, with the laboratory-test note below carried onto the label review.

Available Formats

The biotin reference formula is built for capsule, tablet and softgel versions; bottle counts are suggestions that the brand can adjust.

Format	Unit	Per Serving	Pack Size	Other Ingredients (typical)	Suitability
Capsule	1 capsule	5 mg	60 or 90 capsules	Rice flour or microcrystalline cellulose, flow agent, capsule shell	Lead format; premix blends into a standard fill
Tablet	1 tablet	5 mg	60 or 120 tablets	Cellulose, binder, disintegrant, lubricant	Small compressed unit
Softgel	1 softgel	5 mg	30 or 60 softgels	Vegetable oil, suspending agent, gelatin or plant-based shell, glycerin	Oil suspension of micronized D-biotin

Raw Material Input & Fill (Design Estimate)

Design estimates. The input is the labeled amount divided by the assumed assay of the raw material: pure D-biotin is taken at 100%, and the capsule and tablet blends assume a 10% premix on a carrier, so 5 mg of D-biotin needs 50 mg of premix per unit.

Format	Raw Material Input per Unit	Design Fill	Balance for Excipients	Verification Before Scale-Up
Capsule	50 mg premix (5 mg D-biotin)	250 mg per capsule	200 mg	Blend uniformity, fill weight variation, content assay
Tablet	50 mg premix (5 mg D-biotin)	150 mg tablet weight	100 mg	Content uniformity, hardness, disintegration, content assay
Softgel	5 mg D-biotin	300 mg fill	295 mg	Suspension homogeneity, shell compatibility, content assay

Gummy and powder versions are separate projects, because a milligram-level vitamin load needs its own dispersion and stability work in a sugar or acid matrix.

Formulation Considerations

Blend uniformity at a milligram load. At 5 mg in a 250 mg capsule fill, the active is about 2% of the blend. A premix of D-biotin on a carrier and a stepwise blending order are set early, and content uniformity across the first units decides whether the premix dilution holds.
Oil suspension in a softgel. D-biotin is suspended rather than dissolved in the oil phase, so particle size of the raw material and the suspending agent determine whether each softgel carries the same amount. Settling during fill and storage is checked in the pilot run.
Laboratory-test note. A review reports erroneous results in individuals consuming large amounts of biotin when clinical assays that use streptavidin-biotin technology are used [1]. A label statement for the sales market is reviewed together with the amount tier.
Amount expression. The reference set states biotin in mg, while many labels use mcg. The page carries 5 mg and its equal of 5,000 mcg together, and the unit on the finished label follows the rule of the sales market.

Customization Options

Brands adjust the amount per serving, the premix grade, the format and the add-ons.

Parameter	Range	Note
Amount per serving	1, 2.5, 5 or 10 mg	Options for the brand; premix weight per unit scales with the tier
Biotin grade	Pure D-biotin, premix or micronized grade	Input is recalculated to D-biotin; dilution sets the fill
Format	Capsule, tablet or softgel	Gummy and powder are separate projects
Pack size	30 to 120 units	Set by the brand
Add-ons	Zinc, selenium, vitamin C	A second active changes the premix weight and the uniformity plan

The pilot run confirms blend uniformity of the premix in the capsule and tablet versions, suspension homogeneity in the softgel, and the content assay of the first units against the labeled 5 mg.

Technical Status & Data Sources

Item	Status	Details
Reference formula	NIH DSLD	The ingredient and amount come from a labeled product in the NIH DSLD (5 mg on the label of CF000455; example DSLD labels 3030, 6998, 13132). The label names the ingredient as biotin; D-biotin is set as the form.
Specification	Set in formulation	D-biotin, 5 mg per serving; assay, premix dilution and limits and method are fixed with the supplier. Unit size, fill weight and stability are set in formulation.
Data source	NIH DSLD	DSLD v9.4.0, downloaded 2026-01-10: 50,824 reference formulas merged from on-market labels with complete ingredient amounts. Counts show how labels are distributed.
Market review	Per market	Dose limits, labeling and claims are reviewed for each sales market before a finished product is developed.
References	Sources	[1] Mock DM. Biotin: From Nutrition to Therapeutics. J Nutr. 2017;147(8):1487-1492. DOI · PubMed<br>[2] Patel DP, Swink SM, Castelo-Soccio L. A Review of the Use of Biotin for Hair Loss. Skin Appendage Disord. 2017;3(3):166-169. DOI · PubMed