The dropper and the serving size disagree

The regulation asks for a usable term

Serving size has to be expressed in a term appropriate to the form. For a dropper product that means something the buyer can execute with the dropper you supplied, not a kitchen measure they have to find.

A dropperful is not a fixed quantity

It depends on the pipette length, the bulb, the viscosity of the liquid and how hard somebody squeezes. Two droppers from two suppliers deliver different amounts, so the word carries less precision than a label implies.

Which is why graduated pipettes exist

A marked pipette makes the serving measurable and makes the panel honest. It costs more than a plain one and it removes an entire class of customer confusion, and for a product where the dose matters it is close to necessary.

Match the panel, the directions and the dropper

All three have to say the same thing. A panel in milliliters, a direction in dropperfuls and an ungraduated pipette is three different instructions, and the customer picks one.

Servings per container has to follow

If the serving is one milliliter and the bottle is 30 ml, the panel says thirty. Getting that arithmetic wrong is an easy error on a label that is already crowded, and it is checkable by anybody.

Test it with the actual dropper

Fill the bottle, use the pipette you are shipping, and see what it delivers. That takes five minutes and catches a mismatch that otherwise ships on every bottle.

Viscosity changes what a dropper delivers

A glycerite is noticeably thicker than an alcohol tincture and fills a pipette differently, so a serving size carried across from one product to another can be wrong even with an identical dropper. Measure each formulation rather than assuming.

References