Garcinia Cambogia for Type 2 Diabetes
Garcinia cambogia (hydroxycitric acid) does not improve blood sugar in type 2 diabetes, and major diabetes authorities recommend against using it for glycemic control. It also carries a documented liver-toxicity safety concern.
Why this grade7-layer evidence engine
Direct evidence in type 2 diabetes is essentially absent and points away from benefit. The only T2D trial is a small acute study of intraduodenal hydroxycitrate (PMID 26792024), where in the 8 diabetic participants HCA had no effect on blood glucose, insulin, GIP, or GLP-1. A 2025 meta-analysis of 9 randomized trials (PMID 39943939, n=444) enrolled no people with diabetes and found no significant change in fasting blood sugar (WMD +1.02 mg/dL) or insulin (WMD -0.12 mU/L), with no HbA1c outcome poolable.
More concerning, in that meta-analysis the obesity subgroup (BMI >=30) showed higher fasting glucose and insulin rather than improvement, a signal directly relevant to the obesity-diabetes overlap. Weight-loss data offer no rescue: an earlier meta-analysis (PMID 21197150) found only a trivial -0.88 kg effect, far too small to expect meaningful glycemic benefit.
Regulators and clinicians reinforce the negative verdict. The American Diabetes Association's Standards of Care explicitly states that herbs and spices are not recommended for glycemic benefit, and Cleveland Clinic would not recommend over-the-counter fat burners. On safety, the US FDA recalled all garcinia-containing Hydroxycut products over liver-injury reports, and the supplement carries a theoretical low-blood-sugar interaction risk with diabetes medications. The evidence is graded counter-evidence and disputed.
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 = 0.35
- tier_from_score — 依分數區間映射至 tier letter
- apply_hec_rules — 高品質 SR/MA 顯示 positive (1 篇 > 0 negative)
- tier_strict_requirement_check — Tier 條件達標，未降階
- detect_disputes — 偵測到 1 個 hard + 0 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status