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Wiese, Verena (2009): Untersuchungen zur Wirkung des Nahrungsergänzungsmittels Haarpower® auf das exzessive Haaren ansonsten gesunder Hunde. Dissertation, LMU München: Tierärztliche Fakultät



In this multi-centered, placebo-controlled double-blinded study, 21 clinically healthy dogs with a history of excessive shedding received the food supplement Haarpower® containing Spiraea ulmaria extracts (Haarpower®, n=17) or placebo (n=4) for three months. Age, breed, weight, gender, colour of hair and hair length, feeding habits and the life style of the animals were recorded. The degree of shedding was evaluated on a scale from 0-3 and additionally using a visual analogue scale. Hair specimens were obtained before and after application. Hairs were weighed, counted and microscopically examined. None of the dogs on placebo or Haarpower® improved significantly. On the visual analogue scale, owners estimated the severity of the hair loss at 7.6 (range 4.0 - 10.0) before therapy. After treatment with Haarpower®, the mean severity score was 5.5 (range 0.0-10.0). Objective parameters obtained from the hair specimens did not change significantly during treatment (P>0.1).