A sulforaphane label for kids and one for adults can name the same compound and still print different numbers: one bottle here states a 2 mL daily serving, the other counts two drops for ages 1 to 12. Neither one prints a sulforaphane milligram figure, which is the number most people go looking for.
What the 60 mL bottle prints
The sulforaphane broccoli liquid is the more talkative of the two. It states a 60 mL fill, a 2 mL daily serving, and a 30-day supply, which is arithmetic you can check yourself: 60 divided by 2 is 30.
It also makes a food comparison, saying that two drops deliver the sulforaphane equivalent of one pound of broccoli, and it pairs the sprouts with bacopa monnieri. Note what the label commits to here. The volume is stated, the day count is stated, and the milligram amount is not.
What the bottle aimed at ages 1 and up prints
The kids broccoli sprout extract liquid takes the opposite approach. It states an age band, 1 up to 12, and it builds the formula around sulforaphane with mustard seed myrosinase, organic spinach extract and licorice root.
What it doesn't state is a serving volume or a bottle fill. The copy does say the liquid mixes into juice or water, which tells you how it's meant to be taken without telling you how much to take.
The sulforaphane number neither of them prints
Neither label states a sulforaphane milligram amount, and only one of the two even names glucoraphanin, in its title rather than in a figure.
So a kids-versus-adults comparison can't be made on potency, because potency isn't printed. It has to be made on the two things that are printed: the serving volume on one bottle, and the drop count on the other. The sulforaphane collection is worth scrolling with this in mind, since the labels in it differ more in what they disclose than in what they contain.
Why a drop count isn't the same as a volume
Two drops is a count, not a measurement. How much liquid sits in one drop depends on the dropper orifice and on how thick the liquid is, so a drop count can't be converted into milliliters without the manufacturer's own figure.
A 2 mL serving is different. It's a real volume, it's printed on the bottle, and it lets you work out how long the bottle lasts. When you're comparing two liquids for the same child, the one that prints a volume gives you something to check, and the one that prints drops gives you something to repeat. Both are usable. Only one is arithmetic.
What the age range is actually asking of you
An age band running from 1 to 12 covers a wide spread of body sizes, and a single serving instruction across that spread is a broad statement. That isn't a criticism of any particular label, it's the reality of a category where the printed portion is the same for a toddler and a sixth grader.
The other wrinkle is tagging. The bottle titled for kids carries an adults tag in the same catalog, and collection tags are merchandising rather than dosing instructions. If you're shopping for a 4-year-old, the shelf label won't settle the portion for you. The kids supplements collection is the better filter, though the serving line is still the only thing that answers the question.
When the label gives you a range instead of a number
Liquids aimed at children do this often. The kids magnesium liquid drops say 1 to 2 mL per day before bedtime, and you'll see the same shape across the category: a portion you can adjust rather than a fixed figure.
A range is more honest than a single number, and less convenient. It means the label is asking you to start at the low end and stay there, which is exactly what you'd want with a child. The liquid drops collection has several bottles built this way, and reading them as adjustable rather than fixed will save you some second-guessing.
Do kids need a different sulforaphane amount than adults?
The labels here don't say, and that's the honest answer. Neither bottle prints a milligram amount or a per-age figure, so there is no published split to follow.
How much liquid is one serving?
On the bottle that states it, the daily serving is 2 mL from a 60 mL bottle, which works out to a 30-day supply. The other bottle counts drops instead of milliliters.
Can I mix these drops into juice?
One label says the liquid mixes into juice or water, and that mixability is the usual reason a liquid gets chosen over a capsule for a young child. Check the serving first, then the glass.
Is a bottle tagged for adults fine to give a child?
Tagging is merchandising, so it tells you nothing about the portion. Read the serving line and any stated age range on the panel, and if the bottle prints an age band, stay inside it.