Essential, Serums are highly concentrated and efficient. They provide a deep action with their active ingredients and optimise thus the results of focussed care applied over them. As a one-time treatment according to your needs or as a daily routine, apply on a cleansed skin ideally morning and evening. If you choose only one application, please do so before your night treatment as repair mecanisms and cells renewal occur during your sleeping time. EISENBERG's research has created serums to specifically answer each of your needs whilst respecting its balance: tiredness, stress, external agressions, dull skin, wrinckles and fine lines...The boosting effect is guaranteed!