What Is Ceylon Cinnamon Extract? Blood Sugar, Safety and What Research Shows

Cinnamon is familiar as a culinary spice, but concentrated cinnamon preparations have also been studied in human clinical research—particularly in relation to blood glucose, insulin resistance, lipids, and other metabolic markers.

The results are more nuanced than the common claim that cinnamon simply “mimics insulin” or automatically stabilizes blood sugar.

Different studies have used different cinnamon species, extracts, doses, populations, and treatment periods. Some trials have reported improvements in selected glucose-related markers, while others have found smaller or no meaningful effects.

“Cinnamon has been studied in human metabolic research, but a biological mechanism or positive trial does not make every cinnamon supplement a proven blood-sugar treatment.”

What Is Ceylon Cinnamon?

Cinnamon comes from the bark of trees belonging to the Cinnamomum genus.

Several different species are sold or studied as “cinnamon,” including:

• Ceylon cinnamon: Cinnamomum verum, also called Cinnamomum zeylanicum
• Cassia cinnamon: a broad category that includes species such as Cinnamomum cassia, C. burmannii, and C. loureiroi

These are not chemically identical.

That distinction matters because many older cinnamon studies did not clearly identify the species, plant material, or extract used.

It also matters for safety because cassia cinnamon generally contains substantially more coumarin than Ceylon cinnamon.

Is Ceylon Cinnamon the Same as Cassia Cinnamon?

No.

Ceylon and cassia cinnamon belong to the same botanical genus but differ in their chemical profiles.

One of the best-known differences involves coumarin.

Studies analyzing commercial cinnamon products have found that Ceylon cinnamon generally contains only trace amounts of coumarin, whereas several cassia species may contain considerably higher concentrations.

This difference is one reason why a study using cassia cinnamon should not automatically be used as evidence for a Ceylon cinnamon extract—and vice versa.

Why Is Cinnamon Studied for Blood Sugar?

Cinnamon contains multiple biologically active compounds that have been investigated in laboratory models related to glucose metabolism and insulin signaling.

Experimental research has explored possible effects involving:

• Insulin-receptor signaling
• Glucose transport
• Carbohydrate-digesting enzymes
• Oxidative and inflammatory pathways
• Hepatic glucose metabolism

These mechanisms help explain why cinnamon became an area of metabolic research.

But mechanistic findings should not be rewritten as:

• “Cinnamon acts like insulin in the body”
• “Cinnamon unlocks cells so glucose cannot become fat”
• “Cinnamon keeps the body in fat-burning mode”
• “Cinnamon prevents insulin spikes”

Those statements convert a complex research hypothesis into a guaranteed physiological result.

What Do Human Studies Show About Cinnamon and Blood Sugar?

Human cinnamon research has produced mixed but increasingly substantial evidence.

A 2024 systematic review and dose-response meta-analysis evaluated 24 randomized controlled trials in people with type 2 diabetes.

The pooled analysis reported statistically significant changes in fasting blood glucose, HbA1c, and HOMA-IR compared with control groups, while serum insulin itself was not significantly changed.

Another 2024 systematic review included 28 randomized trials involving more than 3,000 participants with type 2 diabetes. It also reported improvements in several glucose-related outcomes.

These results are relevant, but they need context.

The studies differed substantially in:

• Cinnamon species
• Powder vs. extract
• Daily dose
• Capsule composition
• Baseline glucose control
• Diabetes medications
• Study duration
• Participant characteristics

Statistical heterogeneity was high for several outcomes.

That means the pooled result should not be interpreted as evidence that every cinnamon product will produce the same magnitude of change.

What Does New Research Show About Ceylon Cinnamon Specifically?

This question is especially relevant because many older studies evaluated mixed or poorly specified cinnamon preparations.

More recent trials have begun studying Ceylon cinnamon directly.

A 2025 trial using 1,000 mg per day

A randomized, double-blind, placebo-controlled trial published in 2025 enrolled 150 adults and tested a standardized Cinnamomum zeylanicum extract at 1,000 mg per day for 12 weeks.

The primary endpoint was LDL cholesterol.

The study did not find a statistically significant difference in the primary LDL outcome.

However, fasting blood glucose decreased more in the Ceylon cinnamon group than in the placebo group, with a stronger signal among participants with type 2 diabetes.

A 2025 trial using 250 mg or 500 mg

Another randomized, double-blind, placebo-controlled study evaluated Ceylon cinnamon extract at 250 mg or 500 mg in adults with type 2 diabetes over four months.

The investigators reported improvements in fasting plasma glucose, HbA1c, and selected measures related to insulin resistance and beta-cell function.

These trials strengthen the evidence base specifically for Ceylon cinnamon.

They still do not establish that every Ceylon cinnamon ingredient produces an identical effect.

Product quality is a separate part of that evaluation. Ingredient identity and manufacturing specifications do not tell you by themselves whether a finished supplement has been appropriately tested for contaminants or potency. Our guide to supplement testing, heavy metals, Certificates of Analysis, and quality verification explains what those quality checks can—and cannot—tell you.

Does Cinnamon Improve Insulin Sensitivity?

Insulin resistance is frequently discussed in cinnamon research.

Some clinical trials and meta-analyses have reported changes in HOMA-IR, a calculated marker commonly used in research to estimate insulin resistance.

This supports further investigation of cinnamon in metabolic health.

But a change in HOMA-IR is not equivalent to proving that cinnamon “repairs insulin receptors” or cures insulin resistance.

Insulin sensitivity is affected by many factors, including:

• Body composition
• Physical activity
• Sleep
• Diet
• Genetics
• Medications
• Hormonal status
• Underlying medical conditions

Cinnamon should therefore be discussed as one researched dietary or botanical intervention—not as a substitute for evaluation and treatment of abnormal glucose metabolism.

Does Cinnamon Help With Weight Loss or Abdominal Fat?

This claim requires much more caution than the old version of this article used.

Blood glucose and insulin physiology are related to energy metabolism, but it does not follow that a cinnamon capsule automatically shifts the body from “fat storage” into “fat burning.”

Clinical research on cinnamon and body weight has produced inconsistent and generally modest findings.

Current evidence does not support telling consumers that cinnamon:

• Targets abdominal fat
• Blocks fat storage
• Activates fat burning
• Prevents hormonal weight gain
• Reduces visceral fat because it lowers insulin spikes

NCCIH currently states that it remains unclear whether cinnamon supplementation is helpful for weight loss.

Body weight and body composition are influenced by overall energy intake, physical activity, sleep, medications, endocrine factors, health conditions, and many other variables.

Does Cinnamon Reduce Sugar Cravings?

There is not enough direct evidence to promise this effect.

Cravings can be influenced by:

• Meal composition
• Habit and food availability
• Sleep deprivation
• Stress
• Energy restriction
• Individual glucose responses
• Hormonal and psychological factors

The idea that all sugar cravings are caused by a “glucose crash” is too simplistic.

Likewise, evidence that cinnamon changes a glucose-related biomarker does not establish that it reliably reduces cravings in people using a supplement.

What Does Cinnamon Have to Do With Hormonal Changes?

Glucose regulation can change across adulthood, and menopause-related changes in body composition, sleep, physical activity, and estrogen signaling can influence metabolic health.

That makes metabolic health relevant during midlife.

But this does not mean cinnamon “balances hormones.”

There is no established evidence that cinnamon supplementation:

• Normalizes estrogen
• Lowers abnormal cortisol
• Treats perimenopause
• Prevents menopausal weight gain
• Corrects a hormonal imbalance

For a closer look at the ingredient that has been studied more directly in menopause-related research, read our guide to soy isoflavones, menopause, safety, and what current research shows.

How Much Ceylon Cinnamon Extract Is in RevitaPlus Hormone Balance?

RevitaPlus Hormone Balance is a pre-organized daily wellness pack containing four supplement components.

Its cinnamon-containing capsule provides:

• Ceylon cinnamon extract — 200 mg
• Grape seed extract — 100 mg
• Alpha-lipoic acid — 50 mg

The current Supplement Facts information does not separately establish:

• The extraction ratio
• A standardized cinnamaldehyde percentage
• A standardized polyphenol content
• The raw-material manufacturer
• Equivalence to a published clinical extract
• A finished-product clinical outcome

For that reason, the 200 mg ingredient should not be marketed as “clinical-grade cinnamon” or as a clinically proven dose.

Research performed with isolated Ceylon cinnamon, grape seed extract, alpha-lipoic acid, soy isoflavones, CoQ10, or another ingredient also does not automatically establish the clinical effect of the complete Hormone Balance pack.

Another component included in the tea polyphenol capsule is green tea extract, which contains catechins such as EGCG that have been studied for antioxidant activity, metabolism-related outcomes, and safety considerations. Learn more in our guide to green tea extract, EGCG, metabolism, and what research shows.

For more information about another component in the same pack, read our guide to CoQ10, cellular energy, safety, and what human research shows.

Is Ceylon Cinnamon Safe?

Cinnamon is generally considered safe when consumed in typical food amounts.

Supplemental use involves more concentrated and repeated exposure, so species, amount, duration, medical history, and medication use matter.

Ceylon cinnamon generally contains much less coumarin than cassia cinnamon, which can reduce one particular safety concern associated with high long-term cassia intake.

That does not mean concentrated Ceylon cinnamon supplements are appropriate for everyone.

Possible concerns include:

• Digestive discomfort
• Allergic reactions
• Interactions with medications
• Combined effects with glucose-lowering drugs or supplements
• Uncertainty around high-dose or long-term supplemental use

Speak with a healthcare professional before using concentrated cinnamon supplements if you:

• Take insulin or another glucose-lowering medication
• Have diabetes or recurrent low blood sugar
• Have liver disease
• Take multiple prescription medications
• Are pregnant, trying to become pregnant, or breastfeeding
• Are preparing for surgery
• Regularly combine several botanical supplements

Do not stop or reduce prescribed diabetes medication because you have started taking cinnamon.

The Key Takeaway

Ceylon cinnamon is more than a culinary spice: it is a botanical ingredient with a growing body of human research.

Recent clinical trials provide useful evidence that defined Ceylon cinnamon extracts may influence selected glucose-related outcomes in certain populations.

Broader meta-analyses of cinnamon supplementation also report signals involving fasting glucose, HbA1c, and insulin-resistance markers.

But these findings do not justify describing cinnamon as:

• A natural form of insulin
• A treatment for diabetes
• A cure for insulin resistance
• A fat-burning supplement
• A treatment for abdominal fat
• A cortisol regulator
• A hormone-balancing therapy
• A guaranteed way to reduce sugar cravings

The most important questions are always: Which cinnamon species? Which extract? What dose? Which population? What outcome? And was the exact finished product studied?

Those distinctions are what separate credible ingredient research from an exaggerated supplement claim.

This article is for general educational purposes and is not a substitute for medical advice, diagnosis, or treatment.