Respiratory: Colds, flu, sore throats

Cardiovascular: Cardiovascular health

Gastrointestinal: Diarrhea, digestive problems, ulcers, nausea, vomiting, halitosis, IBS, tooth decay, "food poisoning", gas, supports digestive function, IBS

Genitourinary: Urinary tract infections, premature ejaculation, decrease in menstrual cramping, erectile dysfunction

Musculoskeletal: Arthritis, rheumatism, anti-inflammatory

Neurologic: Increases memory and mental performance (may help Alzheimer's), visual-motor speed, mild headaches, Parkinson's

Skin: Skin infections, yeast infections, acne, insect bites and stings

Glucose: May help lower sugar levels by enhancing insulin activity.

Cholesterol: Lowers cholesterol (LDL, triglycerides)

Immunity: Anti-cancer (prevention)

Other: Lice, blood thinning, diuretic, mosquito repellant, polycystic ovarian syndrome

                                                    *   *   *

SIDE EFFECTS: Typically, side effects occur with greater than recommended doses. These may include mouth sores, liver toxicity, a decrease in blood sugar, and increased bleeding. Skin irritation with topical use. Vomiting. Diarrhea. Drowsiness. Dizziness. Insect repellant (including ticks). Liver toxicity and possibly carcinogenic (especially cassia cinnamon that contains a fairly large amount of coumarin.

CAUTIONS/CONTRAINDICATIONS: Concomitant use with diabetes medications, blood thinners

FORMS: Oils, powders, extracts, capsules, teas

Recommended Brands

Finest Nutrition® (Walgreens) Cinnamon 1000 mg — available through Walgreens stores Oregon’s Wild Harvest “True” Cinnamon (Ceylon)

Natural Factors® WellBetX® CinnamonRich® 

Nature’s Answer® Fluid Extract Cinnamon Bark 

ProCaps® Laboratories Cinnamon 350™ — available in some retail stores 

Trunature® (Costco) Advanced Strength CinSulin — Costco product 

Nature’s Bounty® Cinnamon 2,000 mg — available at retail stores 

Puritan’s Pride® Cinnamon with High‑Potency Chromium — Walmart

I only recommend herbal and supplement brands that meet high standards for safety, effectiveness, and transparency. I research each product before sharing. Some links—like those of Fullscript and —are affiliate links, meaning I may earn a small commission if you buy through them, at no extra cost to you. It helps support this free site. Plus, these links often offer discounts, fast shipping, and helpful reviews.

Dosage

As directed on the product label.

Some clinical and consumer sources describe a wide range of herbal amounts, and many are not supported by strong evidence. Always follow the manufacturer’s instructions.

According to NIH publications, amounts used in studies vary widely depending on the formulation and purpose. These study amounts are not clinical recommendations and may not apply to consumer products.

For detailed drug dosing and interaction information, refer to herbal dosing on the Epocrates website.

Traditional Use (General Information Only)

Cinnamon has been used traditionally in various forms, including capsules, powders, teas, and topical preparations. Traditional uses often relate to digestive comfort, general wellness, and metabolic support. Modern products vary widely in strength and formulation.

Some cinnamon products have been reported to contain high levels of lead or coumarin (a naturally occurring compound that can affect the liver). Choosing reputable brands is important.

These reflect traditional and consumer uses, not evidence‑based medical treatments. Product formulations vary, so it is important to follow the manufacturer’s directions.

*Disclaimer: The material above is for informational purposes only. This information is not intended to diagnose, treat or cure a condition. The uses listed above are tentative; some have or are undergoing research trials, but many are not FDA-approved. It is essential that you investigate these supplements further before deciding to use them. Check interactions and contraindications on sites like Drugs.com or WebMD. Do not attempt to treat a serious condition like liver, kidney problems, high blood pressure, heart, cancer, diabetes, or thyroid issues without discussing it with a healthcare provider first. If you are pregnant, do not use supplements without discussing it with your healthcare provider.