Hello, 1. Skin is not composed of a single chemical that will bring its size (or molecular weight (MW)) compared to substances used on the skin. By comparing the MW numbers together, you can answer whether it will seep or not. The mechanism of absorption is much more complicated than that. And there are many factors that affect absorption. Including the things that must be taken into account are Desired absorption level (sufficient to act) 2. Yes, and does not contain any ingredients in
สูตรเครื่องสำอาง that remain 100% effective after production (actually, these substances I haven't left 100% of the efficiency since the production date is finished) but the effect until I see the effectiveness on the skin. It is not necessary for the active ingredient to work at 100%, only 10% to 90% of the results can be expected.