The spectrum of our products and their effectiveness is extraordinarily broad. It ranges from moisturizing lotions and cleansing milks to deodorant rollers and sprays, sunscreen sprays and self-tanning lotions to wrinkle-reducing or cell-renewing creams. 

For each of these products, we conduct efficacy studies in our Study Center. We test and assess the skin before and after use of each product, or compare a treated area of skin (test site) to an untreated site of skin (control site). 

State-of-the-art measuring devices are used for all examinations. Sometimes we also require self-assessments. 

The length of the study depends on the efficacy being tested. For example, an immediate effect study is limited to one day, while a wrinkle reduction study may take several months. 

If you take part in a study, you will come to our Study Center for the measurements on previously scheduled dates. Each appointment lasts about 60 minutes.