Copper Gluconate vs Copper Sulfate
How copper gluconate and copper sulfate differ in elemental content, absorption, tolerance, and cost.
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Side by Side
| Copper Gluconate | Copper Sulfate | |
|---|---|---|
| Elemental content | 14% elemental copper | 25.5% elemental copper |
| Absorption | High | High |
| How it is absorbed | Soluble salt absorbed through the CTR1 transporter in the small intestine; the fraction absorbed falls as intake rises. | Soluble and well absorbed; more GI irritation on an empty stomach. |
| Typical dose | 1-2 mg elemental copper daily | 1-2 mg elemental copper daily |
| Common uses | pairing with long-term zinc | multivitamins, treating deficiency |
| Side effects | Nausea on an empty stomach. | Nausea, vomiting at higher doses. |
| Cost | Low | Low |
| Also called | None | cupric sulfate |
| Labels in index | 20 | 9 |
When to Choose Copper Gluconate
Choose copper gluconate when you need a small, inexpensive copper dose alongside zinc. The most common copper form in standalone supplements.
Copper Gluconate
Inexpensive and well absorbed. The simplest way to add 1-2 mg alongside zinc.
What to look for: Copper (as gluconate) 1-2 mg per tablet, taken with food.
Find on iHerb Affiliate linkWhen to Choose Copper Sulfate
Choose copper sulfate when you take it with food in a multivitamin. A common copper source in multivitamins and in clinical deficiency treatment.
Copper Sulfate
Standard in multivitamins and in medical treatment of deficiency. More stomach upset when taken fasting.
What to look for: Take with a meal; check the total across all products.
Find on iHerb Affiliate linkProducts on Titrate
In Titrate's index of NIH label data, 20 labels named as copper products list copper gluconate and 9 list copper sulfate.
Copper does not have its own search category yet. Each product above links to its full label in the NIH database.
Related
References
NIH Office of Dietary Supplements. Copper: Fact Sheet for Health Professionals.
Baker DH. Cupric oxide should not be used as a copper supplement for either animals or humans. J Nutr. 1999;129(12):2278-2279.
Willis MS, Monaghan SA, Miller ML, et al. Zinc-induced copper deficiency: a report of three cases initially recognized on bone marrow examination. Am J Clin Pathol. 2005;123(1):125-131.
Kumar N. Copper deficiency myelopathy (human swayback). Mayo Clin Proc. 2006;81(10):1371-1384.
Hedera P, Peltier A, Fink JK, Wilcock S, London Z, Brewer GJ. Myelopolyneuropathy and pancytopenia due to copper deficiency and high zinc levels of unknown origin II. The denture cream is a primary source of excessive zinc. Neurotoxicology. 2009;30(6):996-999.
Schilsky ML, Roberts EA, Bronstein JM, et al. A multidisciplinary approach to the diagnosis and management of Wilson disease: executive summary of the 2022 Practice Guidance on Wilson disease from the American Association for the Study of Liver Diseases. Hepatology. 2023;77(4):1428-1455.