About Ceylon Cinnamon
Cinnamon contains polyphenols (type-A polymers) that may mimic insulin and enhance glucose uptake. Multiple meta-analyses show modest reductions in fasting blood glucose. Ceylon cinnamon (Cinnamomum verum) is preferred for long-term use because cassia cinnamon contains coumarin, which can be hepatotoxic at high doses. Water-soluble cinnamon extracts (like CinnulinPF) remove the fat-soluble coumarin while retaining the active polyphenols. No established RDA/UL.
What Ceylon Cinnamon supports
- Modest fasting blood glucose reduction in meta-analyses — effect size is small and inconsistent across trials
- Cassia (Chinese cinnamon) contains coumarin — chronic high doses risk hepatotoxicity. Ceylon (C. verum) is preferred for daily use.
How much Ceylon Cinnamon to take
The RDA prevents deficiency. The effective range is what clinical trials used to actually move the outcome.
Effective
250–1000
mg
Most studies use 250–500 mg/day of concentrated extract or 1–6 g/day of whole cinnamon powder. Ceylon cinnamon (C. verum) is preferred over cassia due to lower coumarin content. CinnulinPF and Cinsulin are standardized extract forms.
Clinical evidence
Moderate clinical evidence. Multiple meta-analyses show modest blood sugar reduction, but results vary across trial designs
Examine.com