Thirteen Printed Amounts, And What Each One Is

Why a printed amount changes everything

Two labels can name the same thirteen ingredients and mean entirely different things. The one that prints an amount beside each name can be compared with an ordinary intake, with a research dose, and with whatever else you already take. The one that does not cannot be compared with anything at all.

That is the test to apply to any panel in this category, and it takes about four seconds. The federal labelling rule asks for the quantitative amount by weight per serving of every declared nutrient and the percent Daily Value beside it, so a panel of thirteen printed figures is a label doing what the rule asks rather than a label going beyond it. Plenty of products in this aisle still manage less.

One thing to fix in your head before the table. Every figure below is per two-gummy serving, because two gummies is the serving the label declares. There is no per-gummy figure to be had from a panel written that way, and nothing on this website halves one to invent it.

It is worth knowing what the shelf around this product looks like. One survey of 176 skin, hair and nail supplements bought from seven stores found that most lacked independent testing, that many used out-of-date Daily Values, and that most carried health-related marketing claims. That is one local shelf survey rather than a law of nature, but it is the only systematic look anybody has published at this particular aisle.

The thirteen, against their reference intakes

Here is the panel with a second column the label does not have room for: what an adult is judged to need of each one. The last column is arithmetic against the published Daily Value, which is the only thing a printed amount is really for.

Amounts reproduced as the label prints them, in label order. Reference intakes read off the Office of Dietary Supplements fact sheet for each nutrient, all of which are linked at the foot of this page.

The five that cover a day or more

Biotin at 5,000 mcg is the headline and it dwarfs everything else on the label. An adult is judged to need 30 micrograms a day, so this is roughly 167 times that, and it has a piece to itself because the number deserves more than a row in a table.

Folate at 442 mcg DFE is the second largest figure. Those three letters are the useful part: dietary folate equivalents exist because folic acid from a supplement is better absorbed than folate from food, so the unit converts one into the other rather than pretending they are the same. Printing DFE is what a modern panel is supposed to do, and a surprising number still do not.

There is one thing worth saying in the same breath, because raising it and leaving it hanging would be worse than not raising it. High intakes of folate from supplements can mask a vitamin B12 deficiency until its neurological consequences become irreversible. This panel carries both nutrients, 442 mcg DFE of folate alongside 6 mcg of vitamin B12, which is 250 per cent of a day’s worth and the reassuring half of that sentence.

Vitamin B6 at 2 mg sits a little above the 1.3 mg adult RDA and nowhere near any ceiling. It is worth knowing that two upper limits are in circulation for B6: 100 mg a day from the US Food and Nutrition Board, and 12 mg a day from a 2023 European opinion that ODS reports on its own page. Two milligrams is a long way under the stricter of the two.

Pantothenic acid at 5.2 mg is the quiet one. The Adequate Intake is 5 mg, so this is the single entry on the whole label that lands on its reference intake rather than above or below it.

The six that sit below a day

Vitamin A at 70 per cent, vitamin D at 50, vitamin E at 49, iodine at 28, zinc at 25 and vitamin C at 22. Read that group as breadth rather than as a shortfall: it is what separates a panel built for a tissue from a single-ingredient capsule, and it is why a label like this sits comfortably alongside an ordinary diet instead of competing with it.

The three worth a sentence each

Vitamin C at 20 mg is about a fifth of a day. It also carries the one mechanism sentence on this label that is simply true: vitamin C is required for the biosynthesis of collagen. That is a statement about the body rather than about the bottle, and it is the accurate version of a connection this category usually makes badly. The panel prints thirteen nutrients and collagen is not among them.

Zinc at 2.7 mg is about a quarter of a day, where a standalone zinc capsule carries 15 to 30 mg. Zinc is required for protein and DNA synthesis and for wound healing, and zinc deficiency causes hair loss, which is the reason it turns up on panels aimed at this tissue at all.

Iodine at 42 mcg is 28 per cent of a day and under a twenty-fifth of the 1,100 mcg upper limit, so the amount asks nothing of an ordinary adult. The caution here is about the person rather than the figure: some people, such as those with autoimmune thyroid disease, can react to iodine intakes considered safe for everyone else, and iodine can add to the effect of antithyroid medicines such as methimazole.

Vitamin D at 10 mcg is 400 IU, half the 20 mcg Daily Value and a tenth of the 100 mcg upper limit. Vitamin E at 7.4 mg is just under half a day in the natural d-alpha form, and the prefix earns its place: one milligram of the natural form counts as one milligram of vitamin E, where two milligrams of the synthetic form are needed to count for the same one. Vitamin A at 630 mcg is the row that decides who the product is wrong for, and it has its own piece for that reason.

The two at the bottom

Choline at 0.04 mg is forty micrograms against a Daily Value of 550 milligrams, which works out at seven thousandths of one per cent of it.

Inositol at 40 mcg has no reference intake at all: no RDA, no Adequate Intake and no Daily Value exists for it, so there is nothing official for a panel to print a percentage against, which is a fact about the regulations rather than a criticism of the label.

Saying so costs the panel nothing it has earned. Eleven of the thirteen are doing ordinary nutritional work, and a label candid enough to print 0.04 mg instead of rounding it out of sight has told you the truth about the other two without being asked.

How to use a panel like this

The table above is only worth the space if it changes a decision, so here is what to do with it.

• Read the three columns across, not down. A number without its reference intake is a number you cannot use.
• Add up what you already take. Two products carrying the same nutrient both count, and neither label knows about the other.
• Look for the form in brackets. Retinyl acetate, d-alpha, methylcobalamin and DFE each mean something specific.
• Treat the percentages as arithmetic rather than as a verdict. A large one is not a promise and a small one is not a fault.

What a printed panel still cannot tell you is whether you were short of any of these to begin with, and that is the variable doing most of the work in whether a top-up is worth anything to you. It is also the one question no label in this category can answer.

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