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Among inflammatory cytokines, Interleukin-6 (IL-6) is one of the major activators of acute phase response and is also involved in immune response and cancer progression. IL-6 is involved in the up-regulation of enzymes and growth factors acting on the extracellular matrix (ECM) remodelling components in physio-pathological processes. IL-6 enhances the expression of metalloproteases (MMP-)2/9, enzymes that play a key role in ECM degradation and therefore contribute to the process of tumor metastasis. To counteract and/or prevent cancer diseases, many efforts have been devoted to the identification of factors able to inhibit the IL-6-dependent MMP-9/2 expression. Recently, diet polyphenols have been identified as molecules manifesting anti-inflammatory and anti-cancer properties beyond their well-known capacity to promote health on the basis of their antioxidant effects. This review summarizes the …