^a Nutrient concentrations are recommended minimums for carnivorous reptiles and averages for omnivorous reptiles.

^b Nutrient levels expressed on a dry-matter basis.

^c Taurine requirements have not been determined for reptiles (the requirement for cats is 400–500 mg of taurine/kg dry diet).

^d A dietary source of arachidonic acid at 200 mg/kg dry diet may be necessary.

^e Thiamine concentrations should be increased to 10–20 mg/kg if frozen, thawed fish constitute >25% of the diet offered.

^f A source of preformed vitamin A may be required because it is not known if reptiles can convert carotenes to retinol (vitamin A), although it is likely that herbivorous reptiles can.

^g Requirements for vitamin D may be partially or totally satisfied by exposure to sunlight or appropriate sources of artificial ultraviolet light. These suggested concentrations are not sufficient to prevent signs of vitamin D deficiency in green iguanas.

^h 300 IU/kg dry matter is advisable if the diet is high in fat, especially unsaturated fat.