Flosin B

PhytochemicalEllagitanninBest with a meal

What is it

Flosin B is an ellagitannin compound isolated from certain plants, including Lagerstroemia speciosa (banaba). It is studied for blood-sugar-related and antioxidant effects.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Glucose support (preclinical)

Mixed Evidence

Preclinical data for flosin B; banaba leaf has some small clinical studies.

How it works

Flosin B and related ellagitannins (such as lagerstroemin) from banaba leaf have been studied in preclinical models for glucose-uptake-enhancing activity, possibly by influencing GLUT4 translocation in muscle cells. Most clinical evidence relates to banaba leaf extract or its specific corosolic acid component, rather than isolated flosin B.

Dosage

No established dose for isolated flosin B. Banaba leaf extracts standardized to corosolic acid are dosed at 16-32 mg corosolic acid per day.

When and how to take it

Banaba is typically taken with meals.

1 commercial form

Compare the main delivery options and what they’re best suited for.

Banaba leaf extract (contains flosin B)

Main practical source.

Variable.

Safety

Banaba leaf is generally well tolerated; specific safety data on isolated flosin B is lacking.

Who should be cautious

Avoid in pregnancy and breastfeeding due to lack of data. Caution with diabetes medications.

Interactions

Banaba extracts may potentiate antidiabetic medications.

Food sources

Banaba leaf tea

Amount
1 cup
%DV
—

Frequently asked questions

Is flosin B the active in banaba?⌄

It is one of several active compounds; corosolic acid is more commonly standardized.

Does banaba lower blood sugar?⌄

Small clinical trials show modest glucose-lowering effects; not a replacement for diabetes care.

References

Flosin B on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Flosin B (PubMed search) — PubMed link

Track Flosin B with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store
Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.