Beans: A Nutritional Powerhouse

As the United States grapples with rising rates of chronic illnesses such as obesity, diabetes, and cancer, there’s growing evidence suggesting that food can serve as a form of medicine.

In an effort to reduce the risk of these diseases, many trendy diets tout various superfoods. However, some nutrition experts are starting to champion a simple, inexpensive pantry item: beans.

Beans come in a kaleidoscope of colors and forms—from kidney and black to lima, garbanzo, and soy. They can cost as little as $0.15 per serving and are usually under a dollar for a can. Plus, they’re shelf-stable and incredibly versatile.

Given such variety and low price, there’s likely a type of bean for every diet, budget, and taste. Experts assert that most beans carry similar nutritional benefits.

“There’s no definitive ‘healthiest’ bean,” says Caitlin Beale, a registered dietitian. “They are all nutrient-dense. Generally, beans provide a good source of plant-based protein, fiber, complex carbohydrates, folate, iron, magnesium, potassium, and polyphenols.”

Beale does mention “some variations” in the specific nutrients across bean types. For example, soybeans, or edamame, are particularly rich in protein, offering 18 grams per 3.5-ounce serving. Meanwhile, a cup of cooked lima beans contains roughly 40 grams of complex carbohydrates, which aid in maintaining a feeling of fullness and stable blood sugar levels.

“But, overall, all beans provide nutrients considered beneficial for health,” she adds.

Dr. Catherine Metzgar, a registered dietitian and director of coaching at Virta Health, emphasized that incorporating beans into your diet could boost heart health, particularly improving cholesterol levels. She referenced a 2014 study published in the Canadian Medical Association Journal, which linked daily consumption of beans, lentils, or chickpeas to significant drops in LDL cholesterol, often referred to as “bad” cholesterol.

“A significant part of this is the fiber in beans, especially soluble fiber,” she explained. “This fiber acts like a sponge in the digestive system, binding to cholesterol and aiding its elimination from the body, thus lowering LDL.”

Beans also provide potassium and magnesium. Potassium helps regulate the electrical signals that maintain a steady heart rhythm and assists kidneys in flushing out excess sodium, thereby reducing the risk of high blood pressure. Magnesium is essential for relaxing the heart muscle, lowering inflammation, and promoting blood vessel dilation, thus reducing blood pressure.

“Beans are also rich in polyphenols and other beneficial compounds that act as antioxidants, potentially reducing oxidative stress and inflammation,” Beale noted, referencing a 2025 review from the International Journal of Molecular Sciences.

Beans have also shown promise in weight loss, largely due to their high fiber and protein content. For instance, a one-cup serving of cooked black beans delivers around 15 grams of protein and fiber, which meets about 30% and 54% of daily recommended allowances, respectively.

“The fiber slows digestion and absorption of carbohydrates, which can stabilize blood sugar levels and help reduce those annoying midday cravings,” Metzgar pointed out.

Additionally, it seems that black beans may influence hormone levels related to hunger. Interestingly, a recent study found that mice fed a black bean diet experienced a 21.6% increase in the hormone glucagon-like peptide-1 (GLP-1), mimicking effects of certain weight-loss medications.

Metzgar highlighted that the fiber in beans could also promote a healthy gut microbiome. “When gut bacteria break down fiber from beans, they produce compounds that may help alleviate inflammation and support heart health,” she explained.

While different beans have varying amounts of fiber and resistant starch, it’s probably wise to incorporate a mix into your diet for the best benefits, says Beale.

However, caution is advised for those with irritable bowel syndrome (IBS) or similar conditions. Metzgar pointed out, “If you’re not used to consuming beans regularly, some gas or bloating is normal. Your gut bacteria will adapt, and these symptoms usually settle down over time.”

There’s emerging evidence hinting at beans possessing anti-cancer properties, particularly concerning colorectal cancer, which has been increasingly observed in younger Americans, largely linked to inadequate fiber intake in diets.

Beans help add bulk to stool, making it easier to pass and decreasing the time waste spends in the colon, which might protect against potential damage to colon cells from harmful bacteria or contaminants.

A 2023 study from researchers at The University of Texas MD Anderson Cancer Center found that individuals who included a cup of navy beans in their meals daily saw an increase in beneficial gut bacteria and a decrease in bacteria related to colorectal cancer.

“Beans might also lower cancer risk indirectly by supporting a healthy weight, as excess body fat is connected to a higher risk for several cancers,” Beale added.

However, she warned that the evidence linking bean consumption to reduced cancer risk remains observational, meaning we can’t definitively state a cause-and-effect relationship. “A more accurate takeaway is that beans are part of a high-fiber, plant-forward dietary pattern associated with a lower risk of some cancers, especially colorectal cancer,” she said.

For those looking to add beans to their diet, Beale suggests starting small and incorporating them into familiar dishes like adding black beans to tacos or topping salads with chickpeas or lentils. Metzgar favors using beans as a base for dips, such as hummus or black bean dip, and recommends opting for vegetables like carrots for dipping rather than chips.

Lastly, when using canned beans, rinse them to reduce sodium content. “If you’re concerned about gas or bloating initially, start with small portions and gradually increase,” Beale advised.