Five Human Studies at a Glance
Judy 2003, Fukushima and Miura 2012, Lopez-Murillo 2022, Hibi 2022 and Hussain 2022: five published trials summarized with participant numbers, dosage, duration and measured outcomes.
What the human studies actually found
Sample sizes, doses, durations and outcomes are quoted exactly as published — nothing rounded up, nothing dressed up.
| Study | Subjects | Dose · Duration | Key result |
|---|---|---|---|
| Judy et al., 2003 | n=10 people with type 2 diabetes (56 volunteers screened, 32 eligible, 10 enrolled; soft gel n=5, hard gel n=5) | Glucosol (Banaba standardised to 1% Corosolic acid) 16–48 mg/day for 15 days, with a 10-day wash-out between doses | A dose-dependent reduction in blood glucose, the largest being about 30% at the 48 mg dose. Reductions after 15 days were 4.9 / 10.7 / 30.0% for the soft gel and 3.18 / 6.5 / 20.2% for the hard gel at 16 / 32 / 48 mg respectively. |
| Fukushima et al. (cited in Miura, 2012) | n=31 | 10 mg Corosolic acid taken before a 75 g oral glucose tolerance test | Significantly lower blood glucose between the 60 and 120 minute time points. |
| Lopez-Murillo et al., 2022 | n=24 with metabolic syndrome | Banaba 500 mg twice daily for 12 weeks | Improved post-meal glucose, insulin and C-peptide; 67% of participants met the criteria for remission of metabolic syndrome; reduced hepatic insulin resistance. |
| Hibi et al., 2022 | n=14 with impaired glucose metabolism; randomised, double-blind, placebo-controlled, crossover design | Corosolic acid 1 mg/day for 14 days | Significantly lower glucose iAUC during the OGTT than placebo; Corosolic acid was lower than placebo at 30 minutes for glucose (p = 0.024) and at 120 minutes for insulin (p < 0.05). |
| Hussain et al., 2022 | Metformin + Ginkgo n=27 versus metformin + placebo n=20 | Ginkgo Biloba added to metformin for 90 days | Improvements in HbA1c, fasting serum glucose (FSG), serum insulin, the IRI index, BMI, lipid profile and inflammatory markers. |
💡 Key takeaways
- Banaba's effect on post-meal glucose has been observed at a dose as low as 1 mg of Corosolic acid per day, in a randomised, double-blind, placebo-controlled crossover trial.
- Ginkgo Biloba was studied as an addition to standard medication, and the benefits reported were antioxidant, metabolic and vascular — not a direct glucose-lowering action of its own.
- These are small, early-stage human studies. This product is a health functional food with a supporting role: it does not treat or cure disease, and it does not replace the medication your doctor has prescribed.
Explore more
Three Ways Corosolic Acid Works
Banaba's corosolic acid acts on glucose transport, carbohydrate digestion and liver glucose production, while Ginkgo biloba contributes antioxidant and microcirculation support rather than lowering blood sugar directly.
View details →A Four-Layer Blood Sugar Formula
Each 600 mg tablet provides 1.3 mg corosolic acid from Banaba, 36 mg Ginkgo biloba, 8.5 mg zinc, 55 mcg selenium and 1.5 mg vitamin B6, plus six traditional botanicals.
View details →Documents You Can Check
Five original documents cover the manufacturing standard, quality management system, export clearance and batch-level laboratory testing behind this Banaba and Ginkgo complex.
View details →Inside the Korean Production Line
Real photographs of blending, tableting, packaging and quality control at HANMI NUTRITION INC. in Paju-si, Gyeonggi-do, the Korean GMP facility behind every box of 30 tablets.
View details →Daily Use and Safety Notes
Take one tablet a day with water, keep the box dry and out of direct sunlight, and read every caution first, especially if you take prescribed medicine or anticoagulants.
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