Eleuthero for Immune Function
Eleuthero (Siberian ginseng) is widely marketed to boost immunity, but the human evidence is weak and contradictory, so it cannot be said to reliably improve immune function. Major health bodies state that no good human evidence supports this use, and it carries real cautions.
Why this grade7-layer evidence engine
This earns a Weak (C) grade because the entire human record for immune function rests on just two small, double-blind RCTs that disagree. An older 1987 trial (PMID 2963645, n=36) reported a rise in T-helper, cytotoxic, and NK cells, but it published no p-values, gave no funding source, and is decades old. A 2001 RCT in endurance athletes (PMID 11798012) found no significant change in any immune marker, directly contradicting the earlier result.
Regulators and clinicians do not endorse the immune claim. The US FDA only addresses labeling, ruling that eleuthero cannot be sold as Siberian ginseng since it is not a true Panax ginseng, and the WHO monograph treats it as a traditional-use herb without a public-health recommendation. The NIH Office of Dietary Supplements is blunt: no good human evidence supports its use as an immune booster, and it may raise blood pressure, increase bleeding, and raise blood sugar.
Sources also conflict with each other: Cleveland Clinic loosely describes eleuthero as an immune-modulating adaptogen, but this is general wellness content, not a clinical evidence review, and it sits against the NIH position. With no modern RCTs, no meta-analysis, and heavy affiliate marketing around this supplement, the honest verdict is that any immune benefit remains unproven.
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 = 0.449
- 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