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Everything here is reference information drawn from the research literature, not medical advice, and Lamduan is neither a doctor nor a pharmacist. Supplements are not medicines and do not replace anything a doctor has prescribed. If you take regular medication, are pregnant or breastfeeding, have liver or kidney disease, or have surgery coming up, speak to a pharmacist or doctor before starting anything on this page.
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A mineral needed in small amounts but indispensable. The main reason to take it is to offset high-dose zinc, which blocks its absorption.
🎯What it helps withModerate
Preventing copper deficiency in people on sustained high-dose zinc — a real and easily prevented situation.
⚗️Effect on hormonesNo human data
No measurable hormonal effect.
Weight and fat lossNo human data
Nothing to do with fat loss.
🌙SleepNo human data
Nothing to do with sleep.
❤️Other health effectsModerate
Red blood cells, connective tissue, and mobilising stored iron. Copper deficiency causes an anaemia that iron will not fix.
📏Dose and ceiling
Commonly used: 1-2 mg per day
10 mg/day — IOM, based on liver damage. EFSA sets no limit but gives an acceptable intake of about 5 mg/day.
Caution
Excess causes abdominal pain, nausea and diarrhoea, and chronically damages the liver. Anyone with Wilson disease, where the body cannot excrete copper, must not take it.