Curcumin for Depression
Curcumin shows a real but modest antidepressant signal in early trials, mostly as an add-on in people who also have other conditions. The evidence is still too thin and the populations too narrow for it to be considered a proven treatment for depression, and it should not replace antidepressants or therapy.
Why this grade7-layer evidence engine
This earns a Preliminary (B) grade because the human-trial evidence leans positive but is genuinely limited. Two meta-analyses found curcumin beat placebo on depressive symptoms, with a small pooled effect in the larger, more conservative review (PMID 33418373, n=594, SMD -0.32) and a larger effect in another (PMID 31423805, n=531, Hedges' g -0.75) — but the 2021 review explicitly rated the overall quality of evidence as low.
The grade is capped by how the positive results were generated. Most trials are small (under 100 people) and short (6–12 weeks), and the strongest results come from people who also had another illness rather than primary depression: the largest and longest trial was in obese type 2 diabetes patients (PMID 39125295, n=227, 52 weeks), with others in diabetic neuropathy (PMID 31788880) and postpartum women (PMID 40281561). Most designs add curcumin on top of usual care, so it is not established as a standalone treatment.
Regulators and clinics reinforce the caution. EFSA set only a safety intake limit and rejected curcumin health claims, NHS guidance warns against use in liver or biliary disease, and NIH/NCCIH says there is not enough evidence to confirm benefit; Mayo Clinic calls the depression data 'limited,' and psychiatric guidelines do not list it. With drug-interaction and liver-injury safety signals attached, curcumin is best seen as an unproven adjunct, not a substitute for antidepressants or psychotherapy.
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 = 0.6
- 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