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Rousselot manufactures collagen peptides. Their brand, Peptan, is the world’s leading brand and its beneficial effects for skin have been previously demonstrated in double-blind, randomised, placebo-controlled clinical studies.

In order to market the product more effectively Rousselot wished to undertake a longitudinal study with Peptan users to gather anecdotal, non-clinical evidence on the extent to which users feel that their hair, skin, and nail quality is improved with the regular use of the product.



Over a ten-week programme,180 participants from the England Marketing consumer panel each trialled either marine collagen, bovine collagen, or a placebo. The sachets were taken daily and consumers were asked to document their experiences on a weekly basis. This allowed us to track their progress and to identify any notable benefits of taking the supplement. Participants were required to provide photographic evidence before, during, and after the trial. Following completion of the trial, a number of participants were invited to take part in face-to-face focus groups to discuss their experiences in more detail.  


The information collected was able to support a clear commercial strategy, as well as providing new insight on potential markets and messaging for a UK audience. 

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