{"ok":true,"entry":{"slug":"banaba-leaf","kind":"supplement","name":"banaba leaf","aliases":["Lagerstroemia speciosa","corosolic acid"],"brands_sg":["Paradise Herbs","Swanson Vitamins","NOW Foods","Vitacost"],"class":"botanical","tags":["general"],"use_for":"blood-sugar claims rest on small trials and lab work","use_after":null,"use_duration":null,"take_with":null,"pros":["review: corosolic acid lowered blood sugar in 60 min","no adverse effects reported in the trials reviewed"],"cons":["2026 review: preclinical promise, clinical gap","listed strengths run 1.33 mg to 250 mg a capsule","hsa's list is not exhaustive — absence is not clearance"],"dose_note":"no health authority fact sheet gives a dose for banaba leaf; the 2012 review describes water-soluble leaf extracts, corosolic-acid-standardised extracts and purified corosolic acid without one figure that carries across products, and sg.iherb.com listings run from 1.33 mg standardised softgels to 250 mg leaf-extract capsules — as directed on the label or by your pharmacist or doctor","dosage":{"ul":null,"unit":"mg","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":["on glucose-lowering treatment — corosolic acid lowered blood sugar","long-term use — a 2026 review reports no robust clinical validation","product strength varies hugely between banaba products","hsa's prohibited list is not exhaustive; banaba is simply absent"],"clashes":[],"sources":[{"id":"stohs2012","url":"https://europepmc.org/article/MED/22095937","label":"A review of the efficacy and safety of banaba (Lagerstroemia speciosa L.) and corosolic acid (Stohs et al., Phytother Res 2012)","quote":"Pure corosolic acid has been reported to decrease blood sugar levels within 60 min in human subjects.","accessed":"2026-08-27"},{"id":"stohs2012_safety","url":"https://europepmc.org/article/MED/22095937","label":"Stohs et al. 2012 — reported safety","quote":"No adverse effects have been observed or reported in animal studies or controlled human clinical trials.","accessed":"2026-08-27"},{"id":"stohs2012_forms","url":"https://europepmc.org/article/MED/22095937","label":"Stohs et al. 2012 — the preparations studied","quote":"Studies have been conducted in various animal models, human subjects and in vitro systems using water soluble banaba leaf extracts, corosolic acid-standardized extracts, and purified corosolic acid and ellagitannins.","accessed":"2026-08-27"},{"id":"xu2026","url":"https://europepmc.org/article/MED/41929254","label":"A review of the pharmacological mechanism of corosolic acid (Xu et al., Front Pharmacol 2026)","quote":"despite numerous in vitro and animal studies elucidating potential mechanisms … a critical gap exists between this promising preclinical data and robust clinical validation.","accessed":"2026-08-27"},{"id":"hsa_prohibited_2025","url":"https://file.go.gov.sg/hsa-chp-prohibited-restricted-ing-guidelines.pdf","label":"HSA — Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines, GL-CHPB-1-012 Rev. No. 001 (Oct 2025) — banaba / Lagerstroemia speciosa / corosolic acid not listed in Annex A or B (PDF full text searched)","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":"iherb_sg","url":"https://sg.iherb.com/c/banaba-leaf","label":"iHerb Singapore — Banaba Leaf category page, default (best-selling) order, 6 products listed; no Singapore shipping-restriction notice shown","quote":"Paradise Herbs, Banaba Leaf Extract, 180 Vegetarian Capsules (250 mg per Capsule) … Swanson Vitamins, Banaba Extract, 90 Capsules (60 mg per Capsule) … NOW Foods, GlucoFit, 60 Softgels (1.33 mg per Softgel) … Vitacost","accessed":"2026-08-27"}],"brand_certs":null,"updated_at":"2026-08-29T16:16:12.75901+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."}