Table 1. Requirement level of minerals in swine nutrition

Minerals	Requirement level	Animals	Reference
Magnesium	400 mg/kg diet	Swine	NRC [4]
Copper	5 to 10 mg/ kg diet	Weaning pigs	Hill et al. [23]
Copper	5 to 6 mg/kg diet	Growing pigs	ARC [2]
Copper	10 mg /kg diet	Gestation sows	Lorenzen and Smith [25]
Copper	6 mg/kg diet	Lactation sows	NRC [19]