Supplementation of Micronutrient Selenium in Metabolic Diseases: Its Role as an Antioxidant

Table 1

Allowable Se level in aquatic systems

Organization	Criteria
United States Environmental Protection Agency	Se(IV) ≤ 257 μg/L; Se(VI) ≤ 417 μg/L
The French Institute of Industrial Environment and Risks	0.88 μg/L as probable no effect concentration (PNEC) for direct chronic effect; 0.97 μg/L as no observable effect concentration
British Columbia	PNEC = 2 μg/L for freshwaters and marine environment
Environment Canada	PNEC = 1 μg/L for freshwaters

Adopted from a review by Sharma et al. [117].