Restoration of collagen and elastic fibre networks following treatment of photoaged skin with Serenesse, a novel over-the-counter anti-ageing product

Chronic sun exposure induces profound changes to the dermal extracellular matrix (ECM) resulting in the loss of fibrillin-rich microfibrils (FRM) [1] and fibrillar collagen [2]. The gold standard topical treatment for photoaged skin is all-trans retinoic acid (tRA) [3]. The 'Manchester Patch-Test' (MPT) assay was first developed in 2001 as a short-term, exaggerated-use patch test protocol to test the potential efficacy of topical anti-ageing products [4].