Vitamin B12
Daily Value 2.4 mcg. A supplement supplying 2 mcg is supplying a real amount, and 2 mg would be a thousand times the reference.
Micrograms, Milligrams and Fairy Dust
A thousandfold difference, printed in the same size type, next to a name your eye is already reading. Here is how to catch it.
Quick answer
A microgram is one thousandth of a milligram. Supplement panels print both in the same type and the eye reads the ingredient name rather than the unit, so an ingredient at 80 mcg looks much like one at 80 mg. The check takes ten seconds: read the unit on every line, then compare the amount against the dose used in the research for that ingredient. If the gap is thousandfold, the ingredient is on the panel to be named rather than to act.
The unit is the number
Supplement panels are a legal format, and one of the things the format does not do is help you compare scales. Milligrams and micrograms appear in the same column, in the same size type, abbreviated to mg and mcg, two characters apart.
A milligram is one thousandth of a gram. A microgram is one thousandth of a milligram, so one millionth of a gram. The difference between 80 mg and 80 mcg is the difference between a small tablet and a grain of table salt.
That is not a trick anyone is playing. Both units are necessary: vitamin B12 is genuinely measured in micrograms because the body needs very little of it, and an 80 mg dose of B12 would be absurd. The problem is that the same column carries both, and your eye is busy reading the word next to them.
So the first habit worth building when reading any panel is to read the unit before the number, and the number before the name. It inverts the way everyone naturally reads a label, and it is the single most useful thing in this article.
What each unit actually looks like
Physical comparisons, because abstract ratios do not stick.
| Amount | Roughly | Where you meet it on a panel |
|---|---|---|
| 1 gram | A raisin | Rare on a supplement panel. Creatine and some amino acids. |
| 1,000 mg | The same thing, written differently | Apple cider vinegar complexes, fish oils, large botanical doses. |
| 100 mg | A large pinch | Common for botanical extracts and minerals. |
| 1 mg | About a grain of coarse salt | B vitamins, some minerals. |
| 100 mcg | A tenth of that | Iodine, folate, chromium, selenium. All legitimate at this scale. |
| 80 mcg | About one grain of fine table salt | Beet root powder and pomegranate powder on our own label. |
The last row is the one this article exists for, and it is on the product this site sells. Beet root and pomegranate are not nutrients measured in micrograms. They are plant powders, and the research on them uses grams.
When micrograms are completely legitimate
It would be easy to leave you with the impression that a microgram figure is always a warning sign. It is not, and the distinction is worth drawing carefully.
Some nutrients are genuinely active in microgram quantities. Vitamin B12 has a Daily Value of 2.4 micrograms, and a supplement supplying 2 micrograms is supplying a real, meaningful amount. Iodine's adult RDA is 150 micrograms. Folate's is 400 micrograms of dietary folate equivalents. Selenium, chromium, vitamin D and vitamin K all live in this territory.
For those, a microgram figure is the correct unit and a milligram figure would be alarming. Nobody should want 150 milligrams of iodine.
The warning sign is specifically a microgram figure attached to something whose research uses grams. Plant powders, whole-food extracts and most botanicals fall into that category. When you see one in micrograms, the question is not whether the dose is low. It is whether the ingredient is there to do anything at all.
The ten-second check
Search for the ingredient name plus the word dose. If the research talks in grams or hundreds of milligrams and the panel talks in micrograms, you have your answer and you did not need to trust anybody to get it.
Running the check on our own label
JellyRock prints Beet Root Powder at 80 mcg and Pomegranate Powder at 80 mcg. Those are the last two lines of the ingredient list and they are printed honestly, which is why we can write this at all.
Eighty micrograms is 0.08 milligrams. The apple cider vinegar complex on the same panel is 1,000 milligrams, which is twelve and a half thousand times as much.
Against the research the gap is larger still. The NIH's fact sheet on supplements for exercise and athletic performance describes beetroot studies using about 500 millilitres of juice a day, carrying between 310 and 682 milligrams of nitrate. That is the nitrate alone, from a dose measured in half-litres.
So the beet root line on this label is somewhere between four and eight thousand times below the nitrate content of a studied dose, and beet root powder is not pure nitrate, so the real gap is larger than that.
We sell this product. That arithmetic is still what it is, and publishing it is the only reason anything else on this site is worth reading.
About the product behind this blog
JellyRock Premium Formula is an apple cider vinegar gummy: 1,000 mg of vinegar complex, four vitamins and minerals, and two botanicals at eighty micrograms each. Every amount is printed, and we publish the awkward ones as plainly as the rest.
Order NowRead the label firstFour checks on any ingredient list
In order. The first two take seconds and settle most panels.
Read down the unit column first
Ignore the names entirely on the first pass. Just note which lines are mg and which are mcg. You will be surprised how often the impressive-sounding names are in the second group.
Find the biggest number
The largest amount tells you what the product actually is, whatever the front of the container says. Everything else is a supporting cast, and some of the supporting cast may be extras.
Look up the research dose for the names you care about
One search each. You are not trying to become an expert; you are trying to find out whether the panel is in the same order of magnitude as the literature.
Ask what the smallest lines are doing there
Sometimes there is a good answer: black pepper extract for absorption, a small amount of a cofactor. Sometimes the answer is that the name sells and the ingredient costs money.
Why fairy dusting happens at all
It is worth understanding the commercial logic, because it explains why this is so common and why it will not stop.
An ingredient list is a marketing asset. A product that names beetroot can put beetroot on the front of the jar, in the search listing, and in the advertising. A product that contains a research dose of beetroot has to pay for a research dose of beetroot, which for a plant powder means grams, which means a much bigger capsule or a much higher price.
Adding eighty micrograms costs essentially nothing and buys the same marketing asset. The label is completely truthful. The ingredient is in the product. The amount is disclosed. Every rule is followed.
This is also why a proprietary blend is worse rather than better. On a blended label, the eighty-microgram ingredient would simply be one more name inside a total, and you would have no way of knowing. At least here the manufacturer printed the number.
The defence against it is not regulation, which already permits all of this. It is the ten-second check at the top of this article, run by enough buyers that naming an ingredient without dosing it stops being worth the money.
A quick way to convert in your head
Move the decimal point three places. 80 mcg is 0.08 mg. 1,000 mcg is 1 mg. 500 mg is 0.5 g. If an ingredient's research talks in grams and the panel talks in micrograms, that is six decimal places of difference and no amount of formulation cleverness closes it.
Nutrients that genuinely belong in micrograms
So that the check does not turn into a blanket suspicion of a perfectly ordinary unit.
Folate
Daily Value 400 mcg DFE, with a tolerable upper intake level of 1,000 mcg of folic acid a day from supplements and fortified foods.
Iodine
Adult RDA 150 mcg, upper limit 1,100 mcg. Milligram quantities of iodine would be a serious problem.
Selenium
Measured in micrograms and with a narrow window between adequate and excessive, which is exactly why the unit is right.
Vitamin D
Often printed in both micrograms and International Units on the same line, which is its own small source of confusion.
Vitamin K
Another genuine microgram nutrient, and one that matters if you take warfarin.
Why this is worse on a blended label
Everything in this article assumes you can see the amount. On a proprietary blend you cannot, and that changes the check from arithmetic into inference.
A blend prints one total weight and lists its members in descending order of weight. So you learn the order and never the split. An ingredient listed last is the smallest weight in the blend, and that is the only quantitative information you get.
The inference that still works is the upper bound. If a blend totals 500 mg and contains twelve ingredients, no single one can exceed 500 mg, and the last one cannot exceed about 42 mg if the split were even, which it never is.
Run that against the research dose for whichever ingredient brought you to the product. If even the whole blend cannot reach it, the question is settled and you did not need the individual amounts after all.
The product this site sells has no proprietary blend, which is why this article could use its own panel as the example. That is worth something, even when what the panel reveals is not flattering.