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Alpecin Caffeine Liquid promotes active hair roots (Kopie 2)

Conducted by the joint dermatology practice of Dr. Peter and Dr. Seeber, Hamburg

Caffeine neutralises the negative effect of testosterone (Kopie 2)

Conducted at the Clinic and Polyclinic for Dermatology and Venerology of the University of Hamburg-Eppendorf

Alpecin Double-Effect Caffeine Shampoo in comparison to the leading market reference product against dandruff (Kopie 2)

Conducted by Derma Consult GmbH, organisation specialised in dermatological testing.

Efficacy of the caffeine complex in the treatment of androgenetic alopecia (Kopie 1)

Conducted at the Clinic of Dermatology and Dermatological Allergology of Friedrich Schiller University in Jena, Germany

Tests regarding the penetration of caffeine from a shampoo formula (Kopie 1)

Conducted at the Center for Experimental and Applied Skin Physiology and Clinical Research Center for Hair and Skin Physiology of the University Clinic Charité, Berlin.

Use of a caffeine shampoo for the treatment of androgenetic alopecia in men (Kopie 1)

Conducted at the Center for Cosmetic Research of Catholic University of the Sacred Heart in Rome, Italy.

Efficacy of a caffeine-containing liquid against premature hereditary hair loss in men (Kopie 1)

Conducted at the Center for Cosmetic Research of Catholic University of the Sacred Heart in Rome, Italy.

Alpecin Dandruff Killer Shampoo in a dermatological anti-dandruff test (Kopie 2)

Conducted by Derma Consult, organisation specialised in dermatological testing, Alfter.

Efficacy of a cosmetic caffeine shampoo for the treatment of androgenetic alopecia in men (Kopie 1)

Conducted at the Center for Cosmetic Research of Catholic University of the Sacred Heart in Rome, Italy.

Differential effects of caffeine (Kopie 1)

Conducted at the Institute for Dermatology at Lübeck University, Germany.