combination of herbal components curcumin carvacrol thymol cinnamaldehyde in broiler chicken feed impacts on response parameters performance fatty acid profiles meat quality and control of coccidia and bacteria the objective of this study was to determine whether curcumin and a commercial microencapsulated phytogenic supplement containing thymol cinnamaldehyde and carvacrol in broiler chicken feed would improve health and meat quality fatty acid profile as well as to determine the coccidiostatic and bactericidal potential of the additives the broiler chickens were divided into five groups nc negative control feed pc positive control cu with 50 mgkg of curcumin phy 100 mgkg phytogenic and phy cu a combination of both additives at 50 mgkg curcumin and 100 mgkg phytogenic we observed significantly higher levels of total proteins associated with increased circulating globulins as well as lower levels of uric acid cholesterol and triglycerides in the phy cu group than in the nc there were significantly fewer oocysts in birds supplemented with additives in the nc group on day 21 on day 35 the nc phy and phy cu groups had significantly lower counts than the pc and cu groups however at 44 days the lowest counts were in pc group the bacterial counts were significantly lower on day 21 in all groups that received additives than those of the control group however at 44 days the bacterial and escherichia coli counts in these groups were significantly higher than those of the control curcumin with or without phytogenic agent improved meat quality with increased antioxidant levels and reduction of lipid peroxidation there were significantly lower total saturated fatty acid levels and significantly greater monounsaturatedpolyunsaturated fatty acid levels in broilers that consumed additives individually and in combination the combination of additives significantly increased the cryptvillus ratio a marker of improved intestinal health and performance additives potentiated their individual effects suggesting they can replace conventional growth promoters without compromising health intestinal mucosa or meat quality