What Is an Ampoule in Skincare, and Why Are They Sealed?
A small sealed container of a concentrated serum, opened when you start using it. The seal keeps air out of the formula until then.
On the label
Ampoule is a format word, not an ingredient word. It tells you the serum is portioned and sealed, not what is in it.
What it does not mean
It does not mean stronger or medical. Some ampoules are potent, some are plain hydrators in a nicer container. Read the list.