What is the difference between serum and ampoule?

An ampoules has a higher concentration of actives compared to a serum thus making it more potent and requires less frequent use than a serum One is enough in a routine

Thank you for raising this discussion ❣️ I'd like to know too!

As already mentioned ampuoles are like serums with higher concentrations of active ingredients to achieve specific functions - so you can see it like a booster. You can use them after cleansing and toning but before your essence, serum or moisturizer. They usually come in smaller bottles with droppers. Unlike serums, you use them just a few times a week

ampoules are generally more concentrated than serums in active ingredients, eg. a vitamin C or collagen booster

either of the two will enough on a skincare. But, for my personal choice, I use serum more.