Overview
Common spice with modest glucose-lowering effects (cassia type studied most).
- Cinnamomum cassia
- Ceylon
- Cassia powder
- Ceylon powder
- Standardized extract
Mechanism of action
Methylhydroxychalcone polymer mimics insulin signaling.
- · Insulin signaling potentiation
Effects on the body
Organ system effects
High-dose cassia (coumarin) is hepatotoxic.
Evidence-based benefits
Modest fasting glucose reduction in T2D
Moderate evidencePotential side effects
- · Hepatotoxicity (cassia, high dose chronically)
Drug interactions
Safety & non-supplemental interactions
Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.
- ·Pregnant or breastfeeding (insufficient safety data)
- ·Children under 18 (unless directed by a clinician)
Supplement interactions
- A high-quality multivitaminCovers micronutrient cofactors that support most supplement pathways.
- Omega-3 (EPA/DHA)Foundational anti-inflammatory support that complements most regimens.
- High-dose cassiaUse Ceylon for chronic use to limit coumarin.
Dosing & bioavailability
Where to buy
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Third-party testedIndependently verified Cinnamon — look for USP, NSF, or Informed Sport seals on the label for purity and dose accuracy.Cinnamon third party tested NSF
CapsulesPre-measured Cinnamon capsules — easiest for travel and consistent daily dosing without scoops or scales.Cinnamon capsules
PowderBulk unflavored Cinnamon powder — best cost-per-gram and flexible dosing for stacking or mixing into drinks.Cinnamon powder unflavored
Best sellersMost-purchased Cinnamon products on Amazon — a quick way to see what's reviewed widely before you commit.Cinnamon best sellerScientific evidence8Show studiesHide studies
Cinnamon and glycemic control: a meta-analysis
Allen RW, et al.
Meta-analysis of cinnamon in T2D.
Reduced fasting glucose and improved lipids.
PubMed: Cinnamon — Modest fasting glucose reduction in T2D
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