{"ok":true,"entry":{"slug":"cats-claw","kind":"supplement","name":"cat's claw","aliases":["Uncaria tomentosa","una de gato"],"brands_sg":["NOW Foods","Swanson Vitamins","Nature's Answer","Solaray","Nature's Way"],"class":"botanical","tags":["immune","bone-joint"],"use_for":"promoted for joint problems — no conclusive evidence","use_after":null,"use_duration":null,"take_with":null,"pros":["nccih: appears safe orally for up to 6 months","centuries of traditional amazonian use"],"cons":["no conclusive evidence for any health purpose","very few high-quality human trials exist","may slow clotting — bleeding risk at surgery"],"dose_note":"no dose can be quoted: nccih finds no conclusive scientific evidence from studies in people supporting cat's claw for any health purpose, so no source read here states an amount for any use; on safety nccih says it appears to be safe when used orally for short periods of time, as much as 6 months, while there is insufficient reliable information about its safety when applied to the skin; no rda, ul, fda daily value or hsa singapore daily limit exists","dosage":{"ul":null,"unit":null,"fda_dv":null,"rda_ai":null,"ul_status":"none_established","population":"general adult","hsa_max_daily":null},"ul_status":"none_established","sg_class":null,"cautions":["autoimmune disease — nccih: it might make the immune system more active","surgery ahead — nccih: it may slow blood clotting","pregnancy — some studies suggest it is unsafe; little is known for breastfeeding","not listed in hsa's prohibited or restricted annexes — that is not a safety finding"],"clashes":[{"src":["nccih_cats_claw_interactions"],"note":"nccih: theoretical reasons to suspect an interaction","with":"anticoagulant and antiplatelet medicines"},{"src":["nccih_cats_claw_interactions"],"note":"nccih: theoretical reasons to suspect an interaction","with":"blood pressure medicines"},{"src":["nccih_cats_claw_interactions"],"note":"nccih names other supplements in the same interaction sentence","with":"other supplements"}],"sources":[{"id":"nccih_cats_claw_uses","url":"https://www.nccih.nih.gov/health/cats-claw","label":"NIH NCCIH — Cat's Claw, Background","quote":"Indigenous people of the Amazon rainforest have used cat's claw for centuries to ward off disease. Today, cat's claw is promoted for osteoarthritis, rheumatoid arthritis, cancer, viral infections, and other conditions.","accessed":"2026-08-27"},{"id":"nccih_cats_claw_evidence","url":"https://www.nccih.nih.gov/health/cats-claw","label":"NIH NCCIH — Cat's Claw, What Have We Learned","quote":"There's no conclusive scientific evidence based on studies in people that supports using cat's claw for any health purpose, including COVID-19 … many of the studies did not use rigorous methods","accessed":"2026-08-27"},{"id":"nccih_cats_claw_trials","url":"https://www.nccih.nih.gov/health/cats-claw","label":"NIH NCCIH — Cat's Claw, How Much Do We Know","quote":"There have been very few high-quality clinical trials (studies done in people) of cat's claw.","accessed":"2026-08-27"},{"id":"nccih_cats_claw_safety","url":"https://www.nccih.nih.gov/health/cats-claw","label":"NIH NCCIH — Cat's Claw, What Do We Know About Safety (duration, topical use)","quote":"Cat's claw appears to be safe when used orally for short periods of time, as much as 6 months. However, there is insufficient reliable information about its safety when applied to the skin.","accessed":"2026-08-27"},{"id":"nccih_cats_claw_bleeding","url":"https://www.nccih.nih.gov/health/cats-claw","label":"NIH NCCIH — Cat's Claw, What Do We Know About Safety (immune activity and clotting)","quote":"Cat's claw might make the immune system more active, which could increase symptoms of autoimmune diseases … Cat's claw may slow blood clotting, and this might increase the risk of bleeding during surgery.","accessed":"2026-08-27"},{"id":"nccih_cats_claw_interactions","url":"https://www.nccih.nih.gov/health/cats-claw","label":"NIH NCCIH — Cat's Claw, What Do We Know About Safety (drug interactions)","quote":"There are theoretical reasons to suspect that cat's claw might interact with anticoagulant, antiplatelet, and blood pressure drugs, and other supplements as well.","accessed":"2026-08-27"},{"id":"nccih_cats_claw_pregnancy","url":"https://www.nccih.nih.gov/health/cats-claw","label":"NIH NCCIH — Cat's Claw, What Do We Know About Safety (pregnancy and breastfeeding)","quote":"Some studies of the use of cat's claw during pregnancy suggest it is unsafe. Little is known about whether it's safe to use cat's claw while breastfeeding.","accessed":"2026-08-27"},{"id":"hsa_prohibited","url":"https://file.go.gov.sg/hsa-chp-prohibited-restricted-ing-guidelines.pdf","label":"HSA Singapore — Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines, GL-CHPB-1-012 Rev. No. 001 (October 2025), Annex A (118 rows) and Annex B (4 rows) — cat's claw / Uncaria tomentosa not listed in either (alphabetical neighbours 103. Symphytum asperum, 104. Urginea maritima)","quote":"The objective of this guideline is to highlight the substances of concern when used in HS and TM and is not meant to be an exhaustive list.","accessed":"2026-08-27"},{"id":"hsa_hs_guidelines","url":"https://file.go.gov.sg/hsa-hs-guidelines.pdf","label":"HSA Singapore — Health Supplements Guidelines GL-CHPB-3-001 Rev. No. 020 (January 2026), clause 4.8 with Tables 4–5 (vitamins and minerals only — no botanical rows)","quote":"4.8 HS for use by the general adult population should not contain vitamins and minerals exceeding the stipulated limits stated in Tables 4 and 5.","accessed":"2026-08-27"},{"id":"iherb_sg","url":"https://sg.iherb.com/c/cat-s-claw","label":"iHerb Singapore — Cat's Claw category page, default listing order","quote":"1 - 19 of 19 results: NOW Foods, Cat's Claw, 500 mg; Swanson Vitamins, Full Spectrum Cat's Claw; Nature's Answer, Cat's Claw Bark; Solaray, True Herbs, Cat's Claw; Nature's Way, Cat's Claw Bark","accessed":"2026-08-27"}],"brand_certs":null,"updated_at":"2026-08-29T16:16:14.713299+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."}