Adding olive leaves to the diet of fattened lambs improves growth performance and some blood biochemical parameters. According to (Anter et al. 2011), olive leaf extract has the potential to both enhance human health and shield cells from oxidative damage induced by hydrogen peroxide without causing genotoxicity. According to (Sabry 2014), most people find olive leaves safe, non-toxic, and well-tolerated. No reports of toxicity or adverse events have been reported, and no medication interactions are currently recognized