Biotin 5000 mcg Price Guide: The Per-mcg Math

Biotin is the aisle where the numbers on the label look the most extreme and the math turns out to be the simplest. The panels print daily-value percentages in five digits — 16,667 percent of the daily value on a single capsule — because the federal daily value for biotin is just 30 micrograms. A bottle stating 5,000 mcg is delivering 166 times that reference number in one serving, and nearly every product on the shelf does it for pennies. The interesting question is not whether biotin is cheap. It is why two bottles with the identical 5,000 mcg statement can differ by a factor of seven once you price the actual micrograms.

This week we pulled every biotin listing with a live price on supplement.deals: 511 of them, 150 counted bottles, 101 of those single-ingredient biotin. We read the Supplement Facts panels at the retailers for every row carrying numbers below, converted every label to the same unit — 1,000 micrograms equals 1 milligram, so 5,000 mcg is 5 mg — and priced every bottle two ways: per capsule or tablet, and per 1,000 mcg of labeled biotin. Five listings that looked like bargains in the data turned out to be dead or mislabeled when we checked them at the source, and they are excluded from every table.

The unit on this shelf is the microgram

Biotin labels swap between two units, and the swap is exactly 1,000 to 1. A bottle printing 5 mg and a bottle printing 5,000 mcg contain the same measured amount — the NOW Foods panel states it directly: biotin 5 mg (5,000 mcg) in one capsule. The daily value is 30 mcg, which is why the percentages run so large: 1,000 mcg is 3,333 percent, 5,000 mcg is 16,667 percent, and 10,000 mcg is 33,330 percent, exactly as Natrol prints on its facts panel.

Cost per unit = price ÷ count. Cost per 1,000 mcg = price ÷ (count × mcg per unit) × 1,000.

Every serving panel we captured for the tables below says one capsule or one tablet per serving, so no serving division is needed anywhere in this guide. The tables state strengths in milligrams because that is the unit the math shares with the rest of our series.

The 5,000 mcg shelf: the anchor strength, priced six ways

The 5,000 mcg strength is the deepest in the pull and the one most bottles choose as their headline number.

The spread inside one stated strength is 6.96x: $6.333 per 1,000 mg on the 240-count Piping Rock bottle against $44.080 on the 50-count Solgar. Count size, not brand, does most of that work — Solgar charges 22.0 cents per capsule against Piping Rock at 3.2 cents — but it is not the whole story, because the next section shows the same bottle priced 50 percent apart at two stores with the same count.

The same bottle, two stores, 50 percent apart

The cleanest trap in the aisle needs no math at all. The identical NOW Foods 5,000 mcg 120-capsule bottle — same brand, same count, same stated strength — lists at $11.99 on one store and $17.99 on another (the second listing). That is a 1.50x multiple, $6.00 more for the same physical product. Across this series the store column keeps moving prices as much as the label column. The practical read is simple. Before paying any 5,000 mcg sticker, check the second listing of the same bottle — the clean same-bottle gap we could measure on this aisle was 50 percent.

The 10,000 mcg shelf: twice the label, cheaper per mcg

Three fully verified 10,000 mcg bottles are live, and the strength discounts rather than premiums.

The Horbaech bottle is the per-mcg floor of the whole pull: $5.606 per 1,000 mg, 11 percent under the 5,000 mcg floor and 10.7 times under the cheapest 1,000 mcg bottle. Doubling the stated strength did not double the price — it lowered the unit economics, because 10,000 mcg bottles are made in bulk formats. Note the count trap inside this table: Natrol charges 15.0 cents per tablet at 100 counts while Olympian charges 13.5 cents at 120 counts, so the cheaper sticker ($14.99 vs $16.25) is actually the more expensive bottle per tablet.

The 1,000 mcg shelf: small strength, premium pricing

The 1,000 mcg shelf exists for split-dose routines, and it prices like a specialty format: even its floor costs 10.7 times the 10,000 mcg floor per measured microgram. Solgar's own pair shows the count effect again — dropping from $0.110 to $0.087 per capsule, a 21 percent discount for the 250-count bottle — but neither number approaches the big-strength shelves. If the microgram count is what you are buying, the small-strength aisle is the most expensive place on the site to get it.

Gummies, chews, and lozenges: the format tax, priced

The format words move the price more than the strength words do. The cheapest gummy with a stated panel page, Vitadrops 5,000 mcg at 60 gummies for $6.58, runs $0.0219 per 1,000 mcg — 3.46 times the Piping Rock tablet floor for the same micrograms. The KAL 10,000 mcg lozenge at $17.99 for 60 counts runs $0.0300 per 1,000 mcg, 5.35 times the Horbaech tablet floor at the same stated strength. Foster and Thrive sells its 5,000 mcg in a 60-count gummy and a 60-count capsule at the identical $8.99 — the one place in the pull where the format was free — but that is the exception. The rule the shelf shows: every chewable step up from a tablet adds a multiple, and the sweetest format pricing lives in plain vegetarian tablets.

One listing had to be excluded on method, and it is worth naming. A 99-cent 100-count gummy bottle appeared in the data as the cheapest biotin on the site, but its name states the strength per serving rather than per gummy, and its facts panel no longer loads at the retailer. If the serving is two gummies the real rate doubles; if it is one, the bottle would beat every table above. With the label unreadable we left it out of the math entirely — a price you cannot verify is not a price.

The label traps we checked for

Three label patterns in this aisle deserve a warning before any per-unit comparison. First, the blend word: Nature's Way sells a Biotin Forte Extra Strength 5 mg bottle whose captured panel is a full b-complex — vitamin C 100 mg, vitamin B6 25 mg, folate 480 mcg, vitamin B12 10 mcg, plus the biotin. The biotin math still works per the name, but anyone comparing it against a single-ingredient bottle is pricing two different products, and we kept it out of the tables for that reason. Second, the multipack: three listings in our pull were case-of-3 bundles (60-count triples at case pricing), and all three had flipped to unavailable between our data pull and our price check — the format is perishable here, and a case price divided by three is the only honest way to read one. Third, the two-bottle bundle: Piping Rock's own 2-bottle listing of the 240-count tablet is priced at $17.99 against $15.20 for two singles of the same bottle — an 18.4 percent premium for the bundle word on the identical tablets. Bundles are not automatically bulk.

The year at one a day: the flattest shelf in the series

Every verified table row is a one-per-serving panel, so a year of one-a-day is the per-unit price times 365. At the 5,000 mcg strength that runs from $11.56 (Piping Rock, 240 counts) to $80.45 (Solgar, 50 counts); the NOW bottle is $36.47 a year at one store and $54.72 at the other. The 10,000 mcg floor year is $20.46 (Horbaech) and the 1,000 mcg floor year is $21.86 (NOW) — which means the strength choice barely moves the yearly bill. A shopper taking 10,000 mcg a day pays about the same as one taking 1,000 mcg a day, provided both buy the bulk bottle of their strength. What moves the year is count size and store choice: the gap between the best and worst verified bottle in this aisle is $11.56 to $80.45, a factor of seven, inside a single stated strength. Even the small 600 mcg Life Extension bottle works out to $21.90 a year by the name math (100 capsules at $6.00) — we flag that its panel was not among those captured, so it is a name-math figure, not a facts-math one.

Where this fits in the series

This is the eleventh guide in our per-unit price series, and the method keeps traveling: cost per serving sized the creatine monohydrate shelf, per-gram math settled the mass gainer vs whey question, per-capsule math priced vitamin D3 5000 IU and vitamin B12 1000 mcg, and the milligram rulers sorted the mineral and vitamin-E aisles. Biotin adds a scale twist rather than a label twist: the numbers are a thousand times smaller than the milligram aisles, the daily-value percentages are a thousand times larger, and once the unit is normalized the same count-and-store economics decide the price. The full listing set for this aisle, including every bottle in the tables above, lives on our biotin deals page — every price here was live and verified on October 25, 2026.