Copper
2 brands compared · cheapest first
Pure EncapsulationsBest value
Copper Glycinate 2 mg
2 mg elemental copper · 60 capsules
$13.00for 60 doses
$0.217per dose
$0.108 / mg
Best value of the two.
Thorne
Copper Bisglycinate
2 mg elemental copper · 60 capsules
$19.00for 60 doses
$0.317per dose
$0.158 / mg
Bisglycinate (chelated, well-absorbed). Important for zinc-balance (if supplementing high zinc, take 1-2mg copper daily to prevent deficiency).
Note
Life Extension doesn't carry standalone copper (it's in their bone and multi formulas).