Cosmetic Tolerance & Hair Care

Cosmetic Tolerance

Thymuskin is free of any side effect even with long-term use. It contains the thymic peptide active ingredient GKL-02 and moreover additional premium caring ingredients for scalp and hair. All shampoos and scalp serums are free of silicone, parabenes and free of bovine ingredients.

The good tolerability and cosmetic acceptance have been repeatedly approved within controlled scientific observational studies and through investigations carried out by German and international skin clinics and university hospitals.

For example, during a recent observational study by Dr. Barbareschi, the efficacy and safety of Thymuskin was tested by 364 participating patients over a period of six months. In addition to a significant reduction of hair loss, a positive tolerability was reported in 100% of the cases and no side effects were reported. Furthermore, a positive cosmetic acceptance / tolerance could be approved in 98% of all cases*.

Hair Care

In addition to natural substances and cosmetic ingredients, Thymuskin also contains the thymic peptide active ingredient GKL-02. This ingredient composition is foremost responsible for the revitalization and regeneration of the hair. Furthermore, the four Thymuskin lines are suited to match individual hair and scalp conditions.

The thymic peptide active ingredient GKL-02 improves the cell supply of the hair follicles, promotes the formation of new hair cells and strengthens the existing. Natural active ingredients such as caffeine, vitamin E and Urtica dioica provide additional caring and nurturing functions. Also included are cosmetic ingredients such as Panthenol or plant- & wheat proteins for example, which form a group providing hair care properties.

The result is beautiful, natural and strong hair, free of unwanted additives such as parabens, silicones or animal ingredients.

* The effects have been strongly confirmed by several controlled observational scientific studies and through investigations carried out by German and international skin clinics and university hospitals. Ask your doctor or pharmacist. We are glad to provide particular scientific information to professional circles.


Acclimation: When starting to use Thymuskin, the activation of hair follicles can lead to a slight increase in hair loss. In order to minimize this potential effect, adjust the application of the respective Thymuskin Shampoo to your usual washing rhythm (at least twice a week). Apply Thymuskin Serum for the first 6 weeks every 2 days and thereafter daily (even on days when you do not wash your hair). After successful therapy, thymuskin should be slowly reduced.

Pathological hair loss can be a sign of illness. In such cases you must consult a doctor to find the cause. You can also get advice from your pharmacist.

The products of the Thymuskin Med line in particular have been tested for safety in children, during pregnancy and lactation. Therefore Thymuskin Med Shampoo and Med Serum Gel are suitable and our recommendation for

  • Use in children from 3 years
  • Use during pregnancy or breastfeeding

Thymuskin is free of animal components and, when used as directed, is very well tolerated.