Biotin: a microgram nutrient with an NRV
Biotin is measured in micrograms, so the unit matters as much as the number. What to check on a 90 tablet pack.
Micrograms, not milligrams
Biotin is one of the nutrients declared on a microgram scale, usually abbreviated to mcg. A milligram is a thousand times larger than a microgram.
Mixing the two units up makes one pack look a thousand times stronger than another. Always read the unit before you compare the figure.
The NRV column does the comparing for you
Biotin has a nutrient reference value, so the label can show the amount per portion alongside a percentage of that reference. The percentage is the quickest way to put two packs side by side.
- Amount per portion with its unit spelled out
- Percentage of the NRV next to it
- The stated portion, which may not be one tablet
90 tablets is a count, not a duration
A pack of 90 lasts 90 days only if the stated portion is one tablet. If the portion is two, the same pack covers half as long.
Portions per pack, not tablet count, is the number to use when working out value.
Check whether you already have it
Biotin is a common inclusion in multivitamins and B complex products. Before comparing single nutrient packs, read the nutrient table of anything else you are already buying, because the same nutrient may be declared there too.
Tablet means there are excipients
A tablet needs binders, bulking agents or a coating to exist as a tablet. These are declared in the ingredients list and are worth reading if you avoid particular additives.
What the label tells you
The full ingredients list, the amount per portion, allergens, dietary suitability, directions and storage are printed on the pack.
Read the label before you take any supplement, and check the product page for the format, pack size and price before you buy.
