Svenja Walberg Pro Face Formula Day & Night Serum 

The serum duo combines tailored care for day and night. The day serum, with 15% vitamin C, gives the skin a visible boost of freshness and helps promote an even, radiant complexion.
The night serum, with 0.3% retinal, promotes a smoother, firmer, and rejuvenated complexion. Retinal requires only one conversion step to become active retinoic acid and can therefore act more quickly than retinol.
While the vitamin C serum enhances radiance during the day, the retinal serum supports skin regeneration and renewal overnight. You may notice the first results in just a few days.

Vitamin C.

In the morning, apply a small amount of the vitamin C serum to your skin and spread it evenly.
Apply a small amount of the retinal serum in the evening. Start by applying it two to three times a week to allow your skin to gradually get used to retinal. If your skin tolerates it well, you can gradually increase the frequency of use.