Why cilantro is drawing attention for blood sugar, detox and more — and what the science actually shows

Cilantro is one of the most polarizing ingredients in the kitchen.

Its bright, citrus-like flavor gives salsa and many other dishes a fresh lift.

Yet for millions of Americans with a genetic variation, the herb tastes more like soap than a seasoning.

Now it has become the subject of fresh online claims, with wellness creators promoting it as a natural aid for type 2 diabetes, a powerful detoxifier and even an infection-fighting superfood.

To sort the evidence from the hype, the Daily Mail asked two nutrition experts what research actually says about cilantro’s health effects.

Can this common herb really do all that is being claimed? Here is what they said.

How cilantro may affect blood sugar

Cilantro contains plant compounds that may influence the way the body manages blood sugar.

Research suggests these compounds could help the body release insulin, use it more efficiently and slow the conversion of carbohydrates into sugar, which may reduce glucose spikes.

Dr Ronald R Quinton, medical director of the Goldring Center for Culinary Medicine at Tulane University School of Medicine, told the Daily Mail that antioxidants known as flavonoids and polyphenols, along with certain essential oils, may help pancreatic cells release insulin.

He added that these compounds may also help improve insulin sensitivity in tissues.

When insulin sensitivity is low, the pancreas can produce more insulin than the body can properly clear from the bloodstream, which can drive blood sugar higher.

Supporting that idea, a landmark study published in Phytotherapy Research found that cilantro extracts increased insulin release and lowered blood glucose in diabetic animal models.

Why that evidence comes with limits

There is an important catch: many studies use concentrated extracts or dried seed powders rather than the small amount of fresh cilantro people sprinkle on tacos or guacamole.

A more recent trial published in Research Square found that cilantro seed supplements improved blood sugar and cholesterol levels in people with type 2 diabetes, but the researchers used standardized concentrated doses rather than fresh leaves.

“Some research suggests compounds in cilantro may influence insulin and glucose metabolism, but most of that evidence comes from laboratory and animal studies using concentrated extracts,” Caroline Meehan, a registered dietitian and clinical nutrition manager at Penn Medicine in Philadelphia, told the Daily Mail.

“There is limited evidence that eating fresh cilantro will meaningfully lower blood sugar. Think of cilantro as a flavorful and nutritious addition to a balanced diet, rather than a strategy for managing blood sugar.”

A few sprigs contain only a small amount of these compounds, so cilantro alone is unlikely to have a major impact on blood sugar.

Detox claims and antimicrobial hype

Cilantro has also been promoted online as a natural cleanse that can remove heavy metals and fight infections.

Lab studies have shown that it contains germ-fighting compounds, including linalool, which can act against bacteria such as E. coli and salmonella.

But that does not mean eating a handful of fresh cilantro will detox the body or cure an infection.

“Research confirms cilantro has antimicrobial compounds like linalool effective against certain bacteria and fungi in lab studies, but these effects do not necessarily translate to clinical or food safety benefits from normal consumption,” Quinton said.

Meehan agreed.

“Research has shown that certain compounds in cilantro have antimicrobial properties in laboratory settings, but there isn’t strong evidence that eating fresh cilantro has the same effects in the body or can treat an infection,” she told the Daily Mail.

There is also little solid evidence that cilantro detoxes the body. The liver and kidneys already perform that function naturally, and anyone with liver disease should check with a doctor before making major dietary changes.

Risks to keep in mind

As a food, fresh cilantro is a nutritious, low-calorie herb that provides vitamins and antioxidants. It contains vitamin K, which supports blood clotting and bone health, as well as vitamin A and beta-carotene.

Like parsley, basil and mint, it adds flavor, color and nutrients without extra salt. The greater concern is concentrated supplements.

“Safety-wise, cilantro is generally safe in food amounts, but large supplement doses could interact with blood thinners due to its vitamin K content or interact with diabetes medications, potentially causing excessive blood thinning or hypoglycemia,” Quinton told the Daily Mail.

Meehan echoed that warning, noting that supplements do not go through the same FDA premarket approval process as medications.

“It’s important to use caution with supplements or concentrated products and discuss them with a healthcare provider, especially when taking prescription medications,” she said.

The bottom line

Cilantro can be a flavorful, nutritious part of a healthy diet, and the research is intriguing, but it is not a stand-alone treatment for high blood sugar or metabolic disease.

It is best used to add flavor and nutrients to home-cooked meals without extra sodium or many calories.

If you are managing diabetes or another metabolic condition, stick with proven treatments and speak with your healthcare provider about the best plan for you.