We use essential cookies (authentication, your saved goals/stack) by default. With your permission we'll also enable privacy-respecting analytics (Vercel Web Analytics, anonymous load-time metrics) and error-replay diagnostics (Sentry — DOM snapshots only when an error fires) so we can fix bugs faster. Learn more about cookies
4 peer-reviewed studies
What the evidence says
Most Banaba studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from medium-quality randomised trials published 2006–2012 with a typical study size of 31 participants.
Based on 4 studies · 1 RCT · 31 total participants
Confidence
LowBy outcome
Newest study from 2012
A controlled trial (n=31) found corosolic acid lowered post-challenge plasma glucose levels.
Fukushima M et al. · Diabetes Res Clin Pract (2006)
A review summarized the efficacy and safety of banaba (Lagerstroemia speciosa) for glucose control.
Stohs SJ et al. · Phytother Res (2012)
A study identified insulin-like glucose-uptake compounds from Lagerstroemia speciosa.
Bai N et al. · J Agric Food Chem (2008)
An animal study reported anti-diabetes and anti-obesity activity of a standardized banaba leaf extract.
Klein G et al. · Evid Based Complement Alternat Med (2007)