Copaiba oil extracted from the trunk of Copaifera langsdorffii Desf. and flaxseed seeds Linum usitatissimum L., are widely used for prevention treatment many diseases, including cancer. The aim this study was to assess antimutagenic effect these oils against damage-inducing agent cyclophosphamide, in Rattus norvegicus treated vivo, by gavage, using cytotoxicity chromosomal alteration test. anim...