Most of what's in a dropper bottle is carrier liquid rather than herb, and a 2 mL daily serving is the only volume figure these labels print. None of the four bottles reviewed here names its carrier, so the honest answer about the rest of the liquid is that the label doesn't say.
What a carrier is for
A carrier is the vehicle. It holds the extract in solution, makes the portion measurable, and lets a dropper deliver roughly the same amount every time you use it. Without one, you'd be trying to measure a few milligrams of powder with a pipette.
The three carrier families you'll meet are water, vegetable glycerin, and alcohol. Water is cheap and holds water-soluble compounds well, though it needs a preservative system and struggles with resinous plant material. Glycerin is thick and sweet, resists microbial growth when it's concentrated enough, and is common in children's formulas for both of those reasons. Alcohol pulls a broader range of plant compounds into solution and keeps without refrigeration, at the cost of a taste many adults dislike.
Why liquid drops copy doesn't name a carrier
The thyroid support liquid drops are a good illustration. The description lists iodine, selenium, zinc, L-tyrosine, ashwagandha, kelp extract, taurine, schisandra and vitamin D3, and then it gives you a serving of 2 mL daily and stops.
It never says what the 2 mL consists of. That isn't unusual. Carriers belong to the other ingredients line below the supplement panel, and that line simply isn't reproduced in the product copy for any of these four bottles, so there's nothing to quote. I'd rather leave it blank than invent a ratio. You'll find the same gap across the women's supplements range, where the formula gets the attention and the vehicle doesn't.
The serving is the number you can act on
Two of the four bottles print 2 mL a day. The menopause support liquid drops state the same 2 mL, and their formula runs on L-theanine, ashwagandha, broccoli and bacopa monnieri.
Two milliliters is a real volume, it appears on the label, and it's the figure worth writing down. What neither description states is the bottle fill, so the number of days a bottle lasts can't be worked out from the copy alone. At $7.99 and $9.99 respectively, these are inexpensive bottles, and the missing fill volume is the only reason you can't turn those prices into a cost per day. The women's health collection is where both sit, and neither one hands you the arithmetic.
When the label prints milligrams instead of volume
The L-lysine liquid drops invert the pattern. They state 1,000 mg of L-lysine alongside vitamins A, C and B12, and they don't state the volume that carries it.
So you know the payload and not the volume, which is the opposite of the other two bottles. A milligram figure and a milliliter figure aren't interchangeable, and converting one into the other is impossible without a concentration printed on the bottle. If you need to know how many drops to draw, the milligram number won't tell you.
What you can decide without an excipient list
You can still judge the form. The slippery elm liquid drops are built around mucilage, the gel-forming fiber in slippery elm bark and marshmallow root, and the copy suggests a few drops in the mouth or mixed into a drink.
That instruction is the useful part, because it tells you the liquid is meant to coat on the way down rather than to be swallowed fast. What it doesn't tell you is whether the bottle leans on glycerin or water, and that's where the label's information ends. If a carrier matters to you, whether it's avoiding alcohol for a child or counting sugar, the store copy won't settle it, and you'd want the other ingredients line off the physical bottle. The liquid drops collection gathers these bottles in one place, which at least makes the printed servings easy to compare.
Is the liquid in drops just water?
It can be, but you shouldn't assume it. None of the four labels here names a carrier, so there's no stated water, glycerin or alcohol percentage to check.
Why isn't the carrier listed in the product description?
Because the copy reproduces the formula and the serving, not the other ingredients line. That line lives on the physical bottle, and it isn't quoted for any of these four products.
Does the carrier change how well the drops work?
It can affect how well an herb dissolves and how the liquid tastes, but not the labeled amount. The figures these bottles commit to are 2 mL a day or 1,000 mg, and those hold either way.
Should I avoid alcohol based drops for children?
Many parents prefer to, and glycerin based liquids are common in children's formulas because they taste sweet. Since none of these labels states its carrier, ask before you assume.