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http://www.ost-cosmetics.com/about-...ging-serum.html

Cosmetic Serum is a highly concentrated product based on water or oil as any other cream. Serums, or concentrates, contain approximately ten times more of biologically active substances than creams, therefore quicker and more effectively coping with cosmetic problems.

SERUMS EFFECTS

When concentrates are used the skin immediately gets the necessary amount of active substances in such form which assimilates easier. The active substances in high concentration act in the same way as creams - they moisturise, rejuvenate, lift up etc. The only difference is that in case concentrates are used correctly the noticeable results will be reached quicker.

According to the effect produced all serums are strictly divided into the following categories:

lifting up,
revitalising (rejuvenating and regenerating),
moisturising,
nourishing,
anti-inflammatory,
soothing,
anti-stress.