Chlorophyll for Weight Loss
Chlorophyll, taken as spinach thylakoid (green-plant membrane) extract, can modestly blunt hunger in the short term, but there is no reliable evidence it produces meaningful weight loss on its own. Major clinics and regulators do not endorse it for this use.
Why this grade7-layer evidence engine
The strongest human data are about appetite, not the scale. A 2024 dose-response meta-analysis of five trials (PMID 38518202) found thylakoid supplementation slightly reduced hunger (-2.4 mm VAS) and raised fullness (+4.6 mm VAS), but it deliberately did not pool any body-weight outcomes, and the effect appeared only in studies shorter than about eight weeks. The acute, single-meal or single-day trials behind it (PMID 25895695, n=60; PMID 23632035, n=20) likewise measured only hunger, cravings and satiety hormones, never weight.
Evidence for actual weight loss is thin and not independently replicated, which is why this lands at a weak, disputed grade. Only one 12-week trial (PMID 24993695, n=38) showed a statistically significant but small ~1.5 kg between-group advantage (5.0 vs 3.5 kg), and it came from a single Swedish research group. A separate 12-week trial in women with PCOS (PMID 37968684, n=48) found no clear weight benefit beyond the shared calorie-restricted diet, leaving the chronic-weight signal inconsistent.
Authorities are unconvinced or silent. A Cleveland Clinic dietitian explicitly says she would not recommend chlorophyll, calling the weight-loss research limited; Mayo Clinic, Harvard Health and the major obesity societies do not mention it, and it is absent from Examine. The FDA approves chlorophyllin only as a color additive and has treated chlorophyll weight-loss products as unapproved drugs, while EFSA has rejected related detox and antioxidant claims.
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 = 0.525
- tier_from_score — 依分數區間映射至 tier letter
- apply_hec_rules — 高階證據未達主導 (0 positive vs 1 negative)，由 raw_score 決定
- 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