What's the difference between serum and essence?

pu1. Serum is similar to essence, but it's more concentrated

2019-06-27

OK

pu2. Ampoule > Serum > Essence
It's so thick

2019-06-27

OK

pu4. It's the same anyway, so you don't have to apply it all

2019-06-27

OK

pu5=뿌2. You just have to pick one out of the three
If you want to put it on, you can put on the watery one first and the thick one later

2019-06-27

OK