Maximum Tolerable Levels of Minerals in the Feed (mg/kg or % of DM) of Animals Based on the Indexes of Animal Health
	Necessity, levels of Concern in Animal Health, Human Health and Enviroment
Element	Required	Concern for Animal Health	Human Heath (tissue)	MTL could produce dietary levels of concern	Environ-mental Concern (manure)	Rodents	Poultry	Swine	Horse	Cattle	Sheep	Fish	Method LOQ, mg/kg
Aluminum, mg/kg	No	Low				200	1000	1000	1000	1000	1000		20
Antimony, mg/kg	No	Low				70-150							7
Arsenic, mg/kg	Possibly	Medium	Yes	Yes		30	30	30	30	30	30	5	0.5
Barium, mg/kg	No	Low	Yes	Yes		250	100	100	100				10
Bismuth, mg/kg	No	Low	Yes	Yes		500	1000	500	500				50
Boron, mg/kg	Possibly	Medium				150	150	150	150	150	150		15
Bromine, mg/kg	No	Medium				300	2500	200	200	200	200		20
Cadmium, mg/kg	No	High	Yes	Yes	Yes	10	10	10	10	10	10	10	1
Calcium, %	Yes	Medium				2	growers 1.5	1	2	1.5	1.5	0.9	50
							layers 5
Chromium, mg/kg (soluble)	Yes	Low	Yes	Yes		100	500	100	100	100	100		10
CrO						30000	3000	3000	3000	3000	3000	3000
Cobalt,mg/kg	Yes	Low	Yes	Yes		25	25	100	25	25	25		0.01
Copper, mg/kg	Yes	High	Yes	Yes	Yes	500	250	250	250	40	15	100	0.4
Fluorine, mg/kg	Yes	High	Yes	Yes		150	150	150	40	40	60		0.03
Germanium, mg/kg	No	Low				30							3
Iodine, mg/kg	Yes	Low	Yes				300	400	5	50	50		0.01
Iron, mg/kg	Yes	Medium	Yes	Yes	Yes	500	500	3000	500	500	500		5
Lead, mg/kg	No	High	Yes	Yes		10	10	10	10	100	100	10	1
Lilthium, mg/kg	No	Low				25	25	25	25	25	25		2.5
Magnesium, %	Yes	Low				0.5	0.5	growers 0.24  layers 0.8	0.8	0.6	0.6	0.3	60
Manganese, mg/kg	Yes	Low				2000	2000	1000	400	2000	2000		1
Mercury, mg/kg inorg	No	High	Yes	Yes	Yes	0.2	0.2	0.2	0.2				0.02
organic						1	1	2	1	2	2	1
Molybdenum, mg/kg	Yes	High				7	100	150	5	5	5	10	0.02
Nickel,mg/kg	Possibly	Low				50	250	250	50	100	100	50	0.01
Phosphorus, %	Yes	Medium			Yes	0.6	1	1	1	0.7	0.6	1	160
Potassium, %	Yes	Medium			Yes	1	growers 1  layers 0.8	1	1	2	2		150
Rubidium, mg/kg	Possibly	Low				200							0.05
Selenium, mg/kg	Yes	High	Yes	Yes	Yes	5	3	4	5	5	5	2	0.01
Silicon, mg/kg	Possibly	Low								2000	2000		2
Silver, mg/kg	No	Low					100	100				>3	0.3
Sodium, % as NaCl	Yes	High			Yes	4	1.7	3	6	4.5, 3	4		100
Chloride, % as NaCl	Yes	High				4	1.7	3	6	4.5, 3	4		300 Na
Strontium, mg/kg	No	Low				1000	2000	2000	2000	2000	2000		100 Cl
Sulfur, %	Yes	High			Yes	0.5	0.4	0.4	0.5	0.3, 0.5	0.3, 0.5		50
Tin, mg/kg	No	Low				100	100	100	100	100	100		10
Titanium, mg/kg	No	Low				100	100	100	100	100	100		10
Tungsten, mg/kg	No	Low				20	20	20	20	20	20		2
Uranium, mg/kg	No	Low					100					< 100	10
Vanadium, mg/kg	Probably	High					growers 25 layers 5	10	10	50	50		0.005
Zinc, mg/kg	Yes	Medium			Yes	500	1000	500	500	500	300	250	0.3