“…Recently, many studies have reported that dietary supplementation with L-carnitine ( Ghoreyshi et al., 2019a , Ghoreyshi et al., 2019b ; Ghoreyshi et al., 2019a , Ghoreyshi et al., 2019b ), quercetin ( Goliomytis et al., 2014 ), and saponins ( Bera et al., 2019 ) in broiler chickens improves meat quality. In addition, dietary supplementation with spirulina ( Omri et al., 2019a , Omri et al., 2019b , Omri et al., 2019c ), linseeds ( Omri et al., 2019a , Omri et al., 2019b , Omri et al., 2019c ), and fenugreek seeds ( Omri et al., 2019a , Omri et al., 2019b , Omri et al., 2019c ) has successfully improved the egg quality of laying hens. Hen eggs are considered one of the most healthy foods in nature because they contain high-quality proteins and lipids, as well as trace elements and vitamins ( Fredriksson et al., 2006 ; Walker et al., 2012 ).…”