initially bought due working composition of hyaluronic acid, namely sodium hyaluronate in the composition. Then he found such a feature, due to the work .. Job stewardess on the plane, at the height, humidity 6% ie, the skin begins to vigorously produce sebum to samouvlazhnitsya, hence the shine. Each saved as it may, matting napkins, thermal water and etc., etc., silnouvlazhnyayushie cream, a little help. So, this serum skin hydrated longer, apparently as part of glycerin creates a protective film, which does not evaporate from the skin gialuronka. And after 12 chasvovogo flight, skin feels better than other sera. bought a couple more serums, I will test "on high"