SERUMS, AMPOULES & ESSENCES
We import different types of serums, ampoules, and essences for the face and body.
A serum contains a few key active ingredients to address specific issues like brightening, dark spots, wrinkles, etc. The actives are usually more concentrated than what you’ll find in, say, a moisturizing cream. Serums are a bit thicker in consistency -- almost oil-like -- and usually come in a bottle that's much smaller than a toner or cleanser bottle. Often the bottles have droppers to dispense the product, though I've seen serums that are opaque and almost lotion-like, in small pump bottles.
Essences are more lightweight and less concentrated than serums and are used after a toner to add another layer of hydration before you apply serums. However, serums are getting more lightweight and essences are getting thicker, and they both can contain high concentrations of active ingredients. In fact, the very words "essence" and "serum" are nothing but marketing words now. Basically, western women understand "serum" and Asian women understand "essence."
An ampoule is a supercharged serum with higher concentrations of active ingredients that you're meant to use for a finite amount of time as a booster or when you're having a skin crisis of some sort. We recommend using them before your essence or serum. Ampoules usually come in smaller bottles with droppers.
Finally, no matter which or how many products you use, the general rule-of-thumb is to apply the most watery product first and the thickest, richest one last.