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# How long does a serum last?

For a recommended use of 3 drops of serum to be applied morning and/or evening to the face, neck and décolleté, the average duration of our serums is :

**Face serum :**
* For 15ml: 1 and a half months,
* For 30ml + 5ml free travel size: 3 to 4 months.

**Eye serum :**
* For 15ml: 3 to 4 months.