Copper for Neuropathy
Copper supplements help only the rare neuropathy actually caused by copper deficiency, where they halt further nerve damage but rarely reverse it fully; they do nothing for neuropathy in people whose copper levels are normal.
Why this grade7-layer evidence engine
This earns a preliminary (B) grade because the evidence is narrow and indirect. There are no randomized trials, only case series and reviews of them: a 13-patient series (PMID 15249607), two systematic reviews of copper-deficiency myelopathy (PMID 17036563, PMID 20232210), and a report tying zinc overload to nerve damage (PMID 12975299). These consistently show copper-deficiency myeloneuropathy mimics B12-related subacute combined degeneration, and that repletion arrests progression but seldom restores lost function.
Regulators back copper only as an essential nutrient, not a neuropathy treatment. EFSA permits a claim that copper 'contributes to normal functioning of the nervous system,' but that describes general physiology, not therapy. The NHS says a balanced diet supplies enough copper, and WHO treats it neutrally as both a nutrient and a water contaminant.
Clinical sources draw the same line. The Cleveland Clinic and American Academy of Neurology list copper deficiency as a genuine cause of peripheral neuropathy and myelopathy, while Mayo Clinic stresses there is no benefit without a documented deficiency, which is rare. The condition usually stems from excess zinc, bariatric surgery, or malabsorption, so the cause must be corrected too. Copper is also contraindicated in Wilson's disease and harmful in excess.
Scoring transparency
All scores computed by a 7-layer evidence engine — fully auditable▸View the full decision path (audit trail)
- compute_raw_score — 加權公式: L2×0.30 + L3×0.25 + L5×0.25 + L11×0.10 + L1×0.10 = 0.601
- tier_from_score — 依分數區間映射至 tier letter
- apply_hec_rules — 無高階證據可裁決
- tier_strict_requirement_check — Tier 條件達標，未降階
- detect_disputes — 偵測到 0 個 hard + 0 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status