Sea Moss (Irish Moss) for Immune Function
Despite its viral "immune-boosting superfood" reputation, sea moss (Irish moss) has no clinical evidence that it strengthens immune function in people. The plausible mechanisms come only from lab, animal, and microbe studies, so this claim rates as weak evidence.
Why this grade7-layer evidence engine
This claim earns a weak (Tier C) grade because the human evidence is essentially absent. A 2024 systematic review of the Chondrus genus (PMID 38248672) catalogued immunomodulatory signals from carrageenan polysaccharides but stated plainly that clinical data are limited, with no human trial effect estimates. The only supporting findings come from a rat feeding study, where dietary C. crispus raised plasma IgA and IgG and boosted gut Bifidobacterium (PMID 26271359), and a roundworm infection model showing 28% lower pathogen-induced mortality (PMID 24056462). No randomized controlled trial or meta-analysis in people exists.
Mainstream clinics echo this caution rather than endorse the supplement. The NIH LactMed resource states outright that no medicinal value has been proven; Mayo Clinic frames benefits as potential and says more research is needed; Harvard ties seaweed fiber to short-chain fatty acids that support immunity but stresses the human studies are lacking. Cleveland Clinic notes the iron and antioxidant content that contribute to immune health, yet still flags the lack of standardization.
Regulators lean cautious to negative on safety, which keeps the grade from rising. The EU's EFSA warns that seaweed consumption can push iodine and heavy-metal intake past health-based limits, the UK NHS cautions against high-iodine seaweed with thyroid medication, and the FDA recognizes only carrageenan as a food additive, not whole sea moss as a proven immune remedy. Mechanistic plausibility plus real iodine and contaminant risks, but no clinical proof, is the textbook profile of a Tier C claim.
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 = 0.457
- 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