Short answer: copper is one of the nutrients your body needs to make melanin, the pigment that colours your hair, and some studies have found lower copper levels in people who go grey early. But there is no good evidence that taking extra copper, or drinking copper water, prevents or reverses grey hair. Genetics is the main driver of greying, and other nutrients and health factors matter too.
Here is what the research does and doesn't show, so you can make sense of the claims you see online.
Why copper is linked to hair colour
Hair gets its colour from melanin, made by cells called melanocytes in the hair follicle. A key step in making melanin depends on an enzyme called tyrosinase, and tyrosinase needs copper to work. That is the biological reason copper comes up in conversations about grey hair: without enough copper, this pathway can't run normally.
This is a real mechanism, but it is also true of many nutrients. Having enough copper is necessary for normal pigment production; it does not follow that more copper means more pigment.
What studies on premature greying found
Several small studies have compared people with premature greying (greying before about age 20 to 25) with people who had not gone grey. Some reports found lower blood copper levels in the early-greying groups, alongside differences in other nutrients such as zinc, iron, vitamin B12 and vitamin D.
These studies are useful, but they have limits:
- They show an association, not a cause. Lower copper was found alongside greying; the studies don't prove low copper caused it.
- They are small, often with fewer than 100 participants.
- No trial has shown copper reverses greying. We are not aware of any controlled study in which giving people copper restored their hair colour.
Copper also plays a role in the body's antioxidant defences (it is part of the enzyme superoxide dismutase), and oxidative stress in the hair follicle is one of the theories researchers study for why hair greys. Research on this is ongoing and still early.
What actually causes grey hair
- Genetics and age: by far the biggest factors. If your parents greyed early, you are more likely to.
- Nutrient deficiencies: low vitamin B12, iron, copper, zinc or vitamin D have all been studied in connection with early greying.
- Thyroid conditions and some autoimmune conditions.
- Smoking, which is consistently linked to earlier greying.
- Stress: research suggests severe stress may play a role, though the effect in humans is still being studied.
If you are greying unusually early, a doctor can check for deficiencies and thyroid problems with a simple blood test. That is a much better starting point than guessing.
Should you take a copper supplement for grey hair?
Not without medical advice. Most people get enough copper from a normal diet, and copper deficiency is uncommon. Too much copper can be harmful, and high-dose copper or zinc supplements can throw the balance of the two minerals off. If a blood test shows you are low, your doctor can recommend the right approach.
Copper-rich foods
If you want to make sure your diet covers copper, these foods are good sources:
- Shellfish such as oysters and crab
- Nuts and seeds, especially cashews and sunflower seeds
- Legumes such as chickpeas and lentils
- Whole grains
- Dark chocolate
- Organ meats such as liver
See our list of 50 foods rich in copper.
What about drinking water from a copper bottle?
Water stored in a pure copper vessel picks up trace amounts of copper. Drinking it is a centuries-old Ayurvedic practice known as tamra jal, and many people enjoy it as a simple morning ritual. But the amount of copper is small, and there is no evidence that drinking copper water changes hair colour. Think of a copper bottle as a lovely, lasting way to build a daily water habit, not as a hair treatment.
If you do use one, follow the traditional routine: fill it with plain water at night, drink it in the morning, use water only (no juice or hot drinks), and clean it every week or two. Read how much copper water to drink per day.
Frequently asked questions
Does copper reverse grey hair?
No study has shown that copper reverses grey hair. Copper is needed for normal pigment production, but extra copper beyond what your body needs has not been shown to restore colour.
Can copper deficiency cause grey hair?
Some small studies link low copper to premature greying, but they show an association, not proof of cause. A blood test is the only way to know if you are low.
Do copper peptides in shampoo stop greying?
Copper peptides are used in some hair and skin products for scalp care. There is no good evidence they prevent or reverse grey hair.
Is drinking copper water good for hair?
It is a traditional practice and fine for most healthy adults when done correctly, but it has not been shown to affect hair colour.
Shop our handmade copper water bottles, made in our own workshop in India.
This article is for general information and is not medical advice. If you are concerned about premature greying, speak with a doctor or dermatologist.