Cosmetic Tolerance & Hair Care

Cosmetic Tolerance

Thymuskin is free of any undesirable side effects. In addition to the thymic peptide active ingredient GKL-02, Thymuskin contains additional care substances for skin and hair. All Thymuskin shampoos and serum preparations are free of silicones, parabens and animal ingredients.

The good tolerance and the so-called cosmetic tolerance have been repeatedly tested within the framework of controlled scientific application observations and studies at German and international skin and university clinics.1

In addition, expert opinions on compatibility are available from the independent dermatological institute Dermatest, among others.

Nourishes the hair

The thymus peptide active ingredient GKL-02 contained in Thymuskin and selected care ingredients revitalise and regenerate the hair. The active and care ingredients of the Thymuskin shampoo lines also take into account the individual hair and scalp types.

Natural active ingredients such as caffeine, vitamin E and Urtica dioica have additional caring functions. Cosmetic ingredients such as panthenol, plant and wheat proteins are also included, which in turn form a group with hair-care properties.

The result is naturally beautiful hair, free from undesirable additives such as parabens, silicones or animal ingredients.


Acclimatisation phase: At the beginning of the application with Thymuskin, slightly increased hair loss may occur due to the activation of the hair follicles. To minimise this possible effect, adapt the application of the respective Thymuskin shampoo to your usual washing rhythm (at least 1x per week). Apply Thymuskin Serum every 2nd day for the first 6 weeks and daily thereafter (even on days when you do not wash your hair). After completing the therapy, Thymuskin should be slowly reduced.

Please note that the increased hair loss is a positive signal that confirms the activation of the hair roots.

Hair loss can be a symptom of an organic cause. Curing organic causes is not part of the area of application of Thymuskin. Therefore, hair loss may occur again after stopping Thymuskin as long as the organic cause persists. In these cases you should consult your doctor.

In particular, the Thymuskin Med Shampoo and Thymuskin Med Serum Gel preparations are also suitable for use during pregnancy or breastfeeding, as well as for children over the age of 3. All Thymuskin shampoos can be used without hesitation in this context. Thymuskin is very well tolerated when used as directed.

1Thymuskin, Die wichtigsten Studienergebnisse im Überblick (The most important study results at a glance) 2019 Vita-Cos-Med Klett-Loch GmbH