Copper Sulfate

Copper Sulfate is a tier 2 form of Copper, used in 337 on-market products and providing 25.4% elemental copper by weight.

Basis: CuSO4 x 5H2O, pentahydrate ("blue vitriol", standard USP/commercial form; anhydrous at 0.398 also exists)

Why this tier: Used as the reference/comparator form in most animal copper-bioavailability research; highly soluble but not shown superior to organic/chelated forms.

Source: Kegley EB, Spears JW. 1994, J Anim Sci 72(10):2728-34, PMID 7883634 (cattle; CuSO4 ~ Cu lysine >> CuO), not a human study

Trend

Brands using this form