Research into the inexpensive vegetable suggests its fiber and natural plant compounds may influence cholesterol metabolism, digestive health and liver inflammation, although more human studies are needed to establish their effectiveness.
By yourNEWS Media Newsroom
Rhubarb, a tart vegetable commonly used in pies and preserves, is attracting attention for its potential cardiovascular, digestive and liver benefits after researchers identified compounds that may help regulate cholesterol, support intestinal health and reduce inflammation.
The vegetable, which can sell for approximately $2 at grocery stores, contains dietary fiber, antioxidants and naturally occurring substances being investigated for their effects on metabolic health. According to an Oct. 25, 2026, Daily Mail report, recent laboratory findings suggest rhubarb may offer benefits beyond its nutritional value, although clinical evidence remains limited.
Dr. Ronald R. Quinton, medical director of the Goldring Center for Culinary Medicine at Tulane University School of Medicine, and Caroline Meehan, a registered dietitian and clinical nutrition manager at Penn Medicine, discussed the vegetable’s potential health effects and how it can be incorporated into everyday meals.
One of rhubarb’s principal nutritional advantages is its fiber content, which contributes to normal digestive function and may help maintain healthy cholesterol levels. Certain soluble fibers can bind to bile acids in the digestive tract, increasing their elimination through waste.
Because the liver uses cholesterol to manufacture bile acids, increased bile acid excretion can encourage the body to draw additional cholesterol from circulation. This process may help reduce low-density lipoprotein, or LDL, commonly called bad cholesterol.
Meehan explained that this mechanism is one way dietary fiber supports cholesterol management, while Quinton identified rhubarb’s fiber as an important contributor to its potential heart and digestive benefits.
A 2026 study published in the Journal of Nutritional Biochemistry examined plant fractions derived from raw rhubarb and reported increased bile acid production in the liver alongside significant reductions in total blood cholesterol in experimental metabolic models.
Researchers also examined free anthraquinones, naturally occurring compounds in rhubarb that may interact with soluble fiber and influence liver enzymes involved in fat and cholesterol metabolism. The findings suggest multiple plant components could contribute to the observed effects, but they do not establish that ordinary dietary consumption produces comparable results in humans.
Separately, WebMD reports that research has associated rhubarb with reductions in LDL and total cholesterol, noting that lower cholesterol levels are associated with reduced cardiovascular risk. The vegetable also provides vitamin K, an important nutrient involved in blood clotting and bone health, along with other vitamins and antioxidants.
Beyond cholesterol regulation, rhubarb contains compounds that may influence intestinal function and the composition of gut bacteria.
Among these substances are rhein and emodin, anthraquinones known for their laxative properties. These compounds can stimulate intestinal activity, although their effects depend on the amount consumed and whether they are present in whole foods or concentrated preparations.
Rhubarb also supplies fermentable fiber and polyphenols, plant substances that may support beneficial intestinal bacteria and help protect the digestive tract from oxidative damage.
Quinton noted that polyphenolic compounds can help counter oxidative stress and inflammation, biological processes associated with cardiovascular disease and deterioration of the intestinal barrier.
Researchers are also investigating whether rhubarb compounds can reduce the accumulation of potentially harmful bile acids and support the intestinal lining.
A 2025 study published in Phytomedicine examined standardized rhubarb extracts in laboratory models and reported reductions in inflammatory markers affecting the intestinal lining, along with decreased oxidative stress in the liver.
The findings are relevant because persistent liver inflammation and oxidative injury can contribute to fibrosis, a condition characterized by accumulating scar tissue. Advanced fibrosis can eventually progress to cirrhosis, which involves extensive, generally irreversible structural damage to the liver.
However, the experimental findings do not demonstrate that eating rhubarb prevents fibrosis or treats established liver disease. Additional human research is necessary to determine whether the mechanisms observed in laboratory settings produce meaningful clinical benefits.
Another study published in Molecular Nutrition and Food Research reported an association between rhubarb extract consumption and improved indicators of liver health among participants who reported binge drinking alcohol. Those findings involved an extract rather than ordinary servings of the vegetable and should not be interpreted as evidence that rhubarb protects against the harmful effects of excessive alcohol consumption.
Despite its potential nutritional benefits, rhubarb requires careful preparation because some parts of the plant contain toxic substances.
The edible portions are the red, pink or greenish stalks. The large leaves should never be consumed because they contain high concentrations of oxalic acid and related oxalates, which can damage the kidneys and cause serious poisoning.
A toxicology review published in the Journal of Applied Toxicology described rhubarb leaves as a particularly concentrated plant source of soluble oxalates, with levels reported at approximately 1%.
The National Library of Medicine’s MedlinePlus guidance on rhubarb poisoning confirms that the leaves contain potentially harmful substances, including oxalic acid, while the stalks are edible. Poisoning symptoms can include nausea, vomiting, abdominal pain, diarrhea and kidney complications.
Although the stalks contain substantially lower oxalate concentrations, individuals with kidney disease or a history of calcium oxalate kidney stones should consult a health care professional before consuming large amounts.
Concentrated rhubarb extracts also warrant caution. Products containing substantial quantities of anthraquinones can produce abdominal discomfort, diarrhea and excessive laxative effects. Repeated use of stimulant laxative preparations may contribute to dependence on those products for bowel movements.
For ordinary dietary use, the Daily Mail report suggested approximately 100 to 200 grams of rhubarb, equivalent to roughly one or two fresh stalks, as a practical serving containing fiber and beneficial plant compounds.
Its naturally sour flavor can make the vegetable challenging to eat without sweeteners, but preparation methods can improve its taste without relying heavily on added sugar.
Meehan recommended stewing rhubarb with naturally sweet fruits such as berries and flavoring it with cinnamon or ginger. Other preparations include adding thin slices to grain bowls, roasting stalks with olive oil and honey as an accompaniment to meat dishes, or pickling rhubarb in apple cider vinegar.
Using excessive amounts of sugar in rhubarb desserts may offset some of the nutritional advantages associated with the vegetable, particularly for individuals managing blood sugar levels or overall calorie intake.
Rhubarb’s relatively short growing season and sharp flavor have contributed to its limited popularity outside traditional desserts. Nevertheless, its combination of fiber, polyphenols and other bioactive compounds has made it a subject of continuing nutritional research.
The available evidence supports rhubarb as a potentially useful addition to a varied diet, while laboratory findings involving cholesterol metabolism, intestinal inflammation and liver function remain preliminary. Researchers still need larger, well-controlled human trials to establish appropriate dietary amounts and determine whether the observed biological effects translate into measurable improvements in long-term health.
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