article_snippet.sent: Two years ago, a clinical trial looked into the efficacy of the supplement Viviscal (£29.99, Boots).
article_snippet.sent: the efficacy of the supplement Viviscal (£29.99, Boots) involved 63 women: 33 took the supplement, 30 a placebo.
article_snippet.sent: ‘As far as I am aware, the efficacy of the supplement Viviscal (£29.99, Boots) has not yet been published in a peer-reviewed journal and did not appear to look at other parameters, such as hair density,’ Professor Messenger says.