{"ok":true,"entry":{"slug":"sea-moss","kind":"supplement","name":"sea moss","aliases":["Irish moss","Chondrus crispus"],"brands_sg":["True Sea Moss","Codeage","Swanson Vitamins","Vitamatic","Nutricost"],"class":"algae","tags":["general","skin-hair"],"use_for":"a red seaweed eaten as food; its known nutrient is iodine","use_after":null,"use_duration":null,"take_with":null,"pros":["4 g a day of the dried seaweed was judged no risk","supplies iodine, essential for thyroid hormones","not listed in HSA's prohibited/restricted annexes"],"cons":["iodine content varies between samples","a case report links sea-moss to thyrotoxicosis","SG caps supplement iodine at 0.15 mg a day"],"dose_note":"an iodine risk assessment judged 4 g a day of dehydrated Irish moss safe; no efficacy dose is established for sea moss","dosage":{"ul":null,"unit":"mg","fda_dv":null,"rda_ai":null,"ul_status":"none_established","population":"general adult — the 0.15 mg SG cap is on iodine content, not on sea moss itself","hsa_max_daily":0.15},"ul_status":"none_established","sg_class":null,"cautions":["Graves' disease, thyroid nodules or any thyroid condition — sea-moss iodine has precipitated thyrotoxicosis; ask your doctor first","high iodine intakes can cause goiter, raised TSH and hypothyroidism"],"clashes":[{"src":["ods_iodine_supp","sm_case2021"],"note":"via iodine content — high iodine doses can have an additive effect","with":"anti-thyroid medications (e.g. methimazole)"}],"sources":[{"id":"sm_iodine2020","url":"https://europepmc.org/article/MED/32803579","label":"Environmental Science and Pollution Research International 2020 — Risk assessment of iodine intake from the consumption of red seaweeds (Palmaria palmata and Chondrus crispus), 30 samples","quote":"Irish moss (3.86 ± 1.49 mg/kg dry weight) has the highest average iodine content … The consumption of analyzed seaweeds (4 g/day) does not pose a health risk.","accessed":"2026-08-27"},{"id":"sm_case2021","url":"https://europepmc.org/article/PMC/PMC8090171","label":"Journal of the Endocrine Society 2021 — “Fueling the Fire”: Irish Sea-Moss Resulting in Jod-Basedow Phenomenon in a Patient With Grave's Disease (case report)","quote":"Herbal supplements containing sea-moss have high iodine amount which may precipitate thyrotoxicosis in patients with underlying Grave's disease or autonomous thyroid nodules.","accessed":"2026-08-27"},{"id":"ods_iodine","url":"https://web.archive.org/web/20230529002645/https://ods.od.nih.gov/factsheets/Iodine-HealthProfessional/","label":"NIH ODS — Iodine, Fact Sheet for Health Professionals (“Updated: April 28, 2022”), Introduction + Table 1 RDAs + Table 3 ULs; read via the web.archive.org capture 20230529002645 because ods.od.nih.gov 403s direct fetches","quote":"Iodine is an essential component of the thyroid hormones thyroxine (T4) and triiodothyronine (T3) … Table 1 lists the current RDAs for iodine … 19+ years 150 mcg … Tolerable Upper Intake Levels (ULs) for Iodine … 1,100 mcg","accessed":"2026-08-27"},{"id":"ods_iodine_supp","url":"https://web.archive.org/web/20230529002645/https://ods.od.nih.gov/factsheets/Iodine-HealthProfessional/","label":"NIH ODS — Iodine, Fact Sheet for Health Professionals (“Updated: April 28, 2022”), Iodine and Dietary Supplements / Daily Value footnote / Interactions with Medications; read via the web.archive.org capture 20230529002645","quote":"Supplements containing kelp, a seaweed that contains iodine, are also available … The DV for iodine is 150 mcg for adults … Taking high doses of iodine with anti-thyroid medications can have an additive effect","accessed":"2026-08-27"},{"id":"hsa_iodine","url":"https://file.go.gov.sg/hsa-chp-prohibited-restricted-ing-guidelines.pdf","label":"HSA Singapore — Guidelines on Prohibited and Restricted Ingredients in HS and TM (Oct 2025), Annex A row 55 (Iodine); no row for Chondrus crispus, Laminaria, kelp or seaweed","quote":"Iodine … Restricted use in HS and TM … When for oral use by general adult population, the maximum recommended daily dose should not provide more than 0.15mg","accessed":"2026-08-27"},{"id":"hsa_hs_limits","url":"https://file.go.gov.sg/hsa-hs-guidelines.pdf","label":"HSA Singapore — Health Supplements Guidelines (Jan 2026), clause 4.8 + Table 5: Minerals Limits","quote":"HS for use by the general adult population should not contain vitamins and minerals exceeding the stipulated limits stated in Tables 4 and 5 … Table 5: Minerals Limits … Iodine 0.15 mg","accessed":"2026-08-27"},{"id":"hsa_pr_notlisted","url":"https://file.go.gov.sg/hsa-chp-prohibited-restricted-ing-guidelines.pdf","label":"HSA Singapore — Guidelines on Prohibited and Restricted Ingredients in HS and TM, GL-CHPB-1-012 Rev. No. 001 (Oct 2025), Annex A (118 rows, Abrus to Zinc) and Annex B — both searched, no row for this ingredient","quote":"A list of specific prohibited and restricted ingredients is provided in Annex A … This list is not exhaustive. Dealers are responsible to ensure that their products are safe and appropriate for the target consumers.","accessed":"2026-08-27"},{"id":"iherb_sg","url":"https://sg.iherb.com/c/sea-moss","label":"iHerb Singapore — Sea Moss category, default (best-selling) order","quote":"1 - 48 of 62 results … True Sea Moss, Sea Moss Gel Superfood, Mango and Pineapple … Codeage, Sea Moss, Wildcrafted … Swanson Vitamins, Full Spectrum® Irish Moss, 400 mg … Vitamatic, Vegan Sea Moss Gummies … Nutricost, Organic Irish Sea Moss Powder","accessed":"2026-08-27"}],"brand_certs":[{"brand":"Codeage","example":null,"programme":"NSF Certified for Sport","matching_products":0,"brand_total_certified":1}],"updated_at":"2026-08-30T17:59:36.026222+08:00"},"disclaimer":"kozen-x is not a medical device and does not give medical advice. it lists what published sources have written down. absence of a record is not the same as safe."}