TikTok About Cinnamon and Liver Damage Goes Viral. Is It Actually True?

TikTok user Abigail White posted a video warning her followers to be careful about how much cinnamon they put in their yogurt bowls. She'd looked it up. Liver damage, she said. Liver failure.

The video racked up 1.4 million views and sent the comment section into a spiral.

"Great can't have nothing," one person wrote. "Girl you have just ruined my life," said another. "I am just going to act like I never heard this," wrote a third, which is arguably the most honest response on the internet.

But before you throw out your oatmeal spice drawer, the experts who actually study this stuff have some useful nuance to offer.

The Short Answer

Your morning sprinkle of cinnamon is not going to damage your liver. Registered dietitian and nutrition consultant Jen Messer is direct about this: consuming cinnamon as a standard flavoring agent is safe for the vast majority of people. The US Department of Agriculture backs her up — research indicates that consuming around half a teaspoon of ground cinnamon daily is safe with no expected side effects.

The problem shows up at much higher doses. And it depends heavily on which type of cinnamon you're using.

The Two Types of Cinnamon — and Why It Matters

Most people don't realize there are two distinctly different kinds of cinnamon available in the US, and they're not interchangeable from a safety standpoint.

Cassia cinnamon is the variety found in the vast majority of American grocery stores. It's what's in the McCormick jar, what's in cinnamon rolls, what's in your oatmeal. It contains a naturally occurring compound called coumarin.

Ceylon cinnamon — sometimes labeled "true cinnamon" and often sold at health food stores or specialty markets — contains dramatically lower levels of coumarin. It's considered the safer option for anyone consuming cinnamon in larger quantities.

Coumarin is the piece of the puzzle that matters here. In high doses, coumarin can stress and damage the liver because the liver is responsible for filtering it out. It can also be carcinogenic in very large quantities, though the research on that is still developing. At the amounts most people use cinnamon for cooking, coumarin exposure isn't a meaningful concern. The issue arises when people start taking cinnamon supplements — which can pack the equivalent of many teaspoons into a single pill — or genuinely extreme daily culinary use.

The European Food Safety Authority has established a tolerable daily intake of coumarin at 0.1 milligrams per kilogram of body weight. For a 150-pound person that works out to roughly 6.8 mg of coumarin per day. A teaspoon of Cassia cinnamon contains somewhere between 5 and 12 mg of coumarin depending on the source and grind. So at high daily culinary use, particularly with Cassia, you can get into a range that starts to matter over time — especially if you have existing liver conditions.

Who Actually Needs to Pay Attention

For a healthy person sprinkling cinnamon on oatmeal, yogurt, or coffee — this isn't a meaningful health risk. The doses involved are simply too small.

The people who have genuine reason to be more careful are anyone with existing liver disease or liver damage, who should be cautious about coumarin at any level. People taking blood thinners should also be aware — coumarin has mild anticoagulant properties, and in rare cases high cinnamon consumption has been found to interact with blood-thinning medications. And anyone taking daily cinnamon supplements rather than using it as a cooking spice should look carefully at dosing and consider switching to Ceylon cinnamon, which has significantly less coumarin.

The viral cinnamon challenge from a few years back — where people tried to swallow a tablespoon of dry cinnamon — posed a completely different kind of danger, with the real risk being accidentally inhaling the powder and causing respiratory damage rather than liver toxicity.

The Bottom Line

Abigail White's warning wasn't completely wrong — in high doses, cinnamon can be hard on the liver, primarily because of coumarin in Cassia varieties. But the dose required to create meaningful risk is significantly higher than what most people use in everyday cooking.

Your cinnamon toast is fine. Your daily oatmeal is fine. If you're going through half a jar a week in supplement form, that's worth a conversation with your doctor. But for everyone else who saw that video and briefly panicked about their spice rack — you can relax.

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