Copper Amino Acid Chelate vs. Copper Sulfate
Among 3,989 on-market copper products with an identifiable primary form, 33.8% use Copper Amino Acid Chelate (1,347 products) and 8.4% use Copper Sulfate (336).
| Copper Amino Acid Chelate | Copper Sulfate | |
|---|---|---|
| Quality tier | Tier 1 | Tier 2 |
| Copper by weight | 30.0% | 25.4% |
| Share of market | 33.8% | 8.4% |
| On-market products | 1,347 | 336 |
| Median declared dose | 1,000 elemental mcg middle half: 500–2,000 | 1,650 elemental mcg middle half: 900–2,000 |
| Most common brands | Douglas Laboratories, NOW, Bluebonnet | Nature's Way, 21st Century, GNC Women's Ultra Mega |
Doses are declared per serving in elemental mcg. “By weight” is the share of the ingredient that is the nutrient itself (e.g. elemental magnesium in a magnesium salt).
Why Copper Amino Acid Chelate is tier 1
The specific form used in the one human RCT with a defined copper chelate that demonstrated a measurable physiological effect (raised SOD1/ceruloplasmin).
Source: DiSilvestro RA et al. 2012, Metabolism 61(9):1242-6, PMID 22444781
Why Copper Sulfate is tier 2
Used as the reference/comparator form in most animal copper-bioavailability research; highly soluble but not shown superior to organic/chelated forms.
Source: animal comparator evidence, PMID 7883634, not a human RCT
Other copper comparisons
- Copper Gluconate vs. Copper Amino Acid Chelate
- Copper Gluconate vs. Cupric Oxide
- Copper Gluconate vs. Copper Citrate
- Copper Gluconate vs. Copper Sulfate
- Copper Amino Acid Chelate vs. Cupric Oxide
- Copper Amino Acid Chelate vs. Copper Citrate
- Cupric Oxide vs. Copper Citrate
- Cupric Oxide vs. Copper Sulfate
- Copper Citrate vs. Copper Sulfate