Short answer: copper is one of several trace minerals involved in thyroid hormone metabolism, and studies have found links between copper levels and thyroid hormone levels. But the research is mostly observational, too much copper can be as much of a problem as too little, and copper water is not a treatment for any thyroid condition. If you have a thyroid problem, follow your doctor's advice.
How copper relates to the thyroid
Your thyroid makes hormones (mainly T4 and T3) that help regulate metabolism and energy. Making and converting these hormones depends on several nutrients: iodine above all, plus selenium, zinc, iron and copper.
Researchers have looked at copper because it takes part in the body's antioxidant enzymes and in metabolic processes connected to the thyroid. Some studies have reported associations between blood copper levels and thyroid hormone levels, and reviews describe copper as one of the trace elements that may influence thyroid activity and lipid metabolism.
What the research does and doesn't show
- Associations, not proof. Studies show that copper levels and thyroid hormone levels can move together. They don't show that changing copper intake fixes thyroid problems.
- Balance matters. Copper interacts with zinc and selenium. High-dose zinc supplements, for example, can lower copper. More of one mineral is not automatically better.
- Thyroid disease can change copper levels. Some differences in copper may be a result of thyroid problems rather than a cause.
- No evidence copper water treats thyroid conditions. We are not aware of any trial showing that drinking copper water improves thyroid function.
Getting enough copper
Most people get enough copper from a varied diet. Good sources include nuts, seeds, shellfish, whole grains, legumes and dark leafy greens. See 50 foods rich in copper.
Copper deficiency is uncommon and is more likely after gut surgery, with some digestive conditions or with long-term high zinc intake. Read our guide to copper deficiency. Do not start copper supplements without a blood test and medical advice.
Where copper water fits
Storing drinking water overnight in a pure copper vessel is a traditional Ayurvedic practice called tamra jal. The water picks up trace amounts of copper. For most healthy adults it is a safe, pleasant daily ritual when done correctly, and a good way to drink more plain water. It is not a thyroid treatment and should never replace medication.
If you have a thyroid condition, Wilson's disease, or liver or kidney problems, check with your doctor before drinking copper water regularly.
Frequently asked questions
Is copper good for the thyroid?
Copper is one of several minerals involved in thyroid hormone metabolism. Having enough matters, but extra copper has not been shown to improve thyroid function.
Can copper water help hypothyroidism?
No. There is no evidence that copper water treats hypothyroidism or any thyroid condition. Follow your doctor's treatment plan.
Should I take copper supplements for my thyroid?
Only if a doctor recommends it after testing. Too much copper can be harmful and can upset the balance with zinc.
Explore our handmade copper water vessels and copper water bottles.
This article is for general information only and is not medical advice. It is not intended to diagnose, treat, cure or prevent any disease.