Know2eat

Pinto beans

Phaseolus vulgaris

What pinto beans has been studied for

3 associations assessed — 3 with at least some human evidence behind them. Strongest first.

  • 2 Moderate
  • 1 Limited
4 things to know first — allergies, interactions and intake limits

About pinto beans

The mottled common bean of Mexican and southwestern US cooking, and the usual bean behind refried beans. The USDA reference entry is for the raw dry seed, which roughly triples in weight when boiled.

Also known as Frijol pinto, Speckled bean

Blood Sugar & Metabolic HealthHeart HealthWeight Management

The evidence in depth

Best supported: Moderate

What each association actually rests on, and the papers behind it. A rating describes the state of the research, not how impressive the food is. How we rate evidence.

Blood glucose response

Blood Sugar & Metabolic Health
Moderate evidence

Several trials report a low post-meal glucose response to pinto beans compared with refined starch, and pooled pulse analyses report small improvements in fasting glucose over longer periods.

Moderate evidence. Several human studies point the same way, with real caveats.

2 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Blood lipid profile

Heart Health
Moderate evidence

Pinto beans are one of the more frequently tested individual pulses, and several controlled trials report modest LDL and total cholesterol reductions when they are added to the diet. The effect sizes are small and the trials short.

Moderate evidence. Several human studies point the same way, with real caveats.

3 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Satiety and appetite

Weight Management
Limited evidence

Some trials report higher fullness ratings after bean-containing meals than after matched meals without them. Whether that translates into lower energy intake across a day is much less clear.

Limited evidence. Early human work, or mostly lab and animal research.

2 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Ask about Pinto beans

Ask about Pinto beans

Answers are written only from the entries on this page — the same nutrients, compounds, claims and citations you can read above. Nothing is added from outside the database, and every answer lists what it was built from.

AI explanations are not switched on for this site, so there is nothing to ask here. Everything above is read straight from the database and does not need them.

Key nutrients

Nutrient content per 100 grams
NutrientAmount% DV
Macronutrients
Calories347 kcal17%
Protein21.4 g43%
Total fat1.23 g2%
Carbohydrate62.5 g23%
Fibre15.5 g55%
Total sugars2.11 g—
Water11.3 g—
Fats
Saturated fat0.235 g1%
Monounsaturated fat0.229 g—
Polyunsaturated fat0.407 g—
Cholesterol0 mg0%
EPA (omega-3)0 g—
DHA (omega-3)0 g—
DPA (omega-3)0 g—
Linoleic acid (omega-6)0.17 g—
Vitamins
Vitamin A0 µg0%
Vitamin C6.3 mg7%
Vitamin D0 µg0%
Vitamin E0.21 mg1%
Vitamin K5.6 µg5%
Thiamin (B1)0.713 mg59%
Riboflavin (B2)0.212 mg16%
Niacin (B3)1.17 mg7%
Pantothenic acid (B5)0.785 mg16%
Vitamin B60.474 mg28%
Folate525 µg131%
Vitamin B120 µg0%
Choline66.2 mg12%
Minerals
Calcium113 mg9%
Iron5.07 mg28%
Magnesium176 mg42%
Phosphorus411 mg33%
Potassium1393 mg30%
Sodium12 mg1%
Zinc2.28 mg21%
Copper0.893 mg99%
Manganese1.15 mg50%
Selenium27.9 µg51%
Other measured compounds
Beta-carotene0 µg—
Alpha-carotene0 µg—
Lycopene0 µg—
Lutein + zeaxanthin0 µg—
Caffeine0 mg—
Ash3.46 g—

Nutrient values are per 100 g of the USDA reference entry named on this page and vary with variety, growing conditions, storage and preparation.

Source record: Beans, pinto, mature seeds, raw (Includes foods for USDA's Food Distribution Program) (USDA FoodData Central, FDC ID 175199).

% DV uses the FDA Daily Values for adults and children aged 4 and over. A dash means no Daily Value has been established for that nutrient.

Bioactive compounds

Compounds present in meaningful amounts. Presence is banded rather than quantified, because whole-food levels vary enormously with variety, growing conditions, storage and preparation.

How preparation changes things

Only effects with real support are listed. If a preparation method is missing, it is because nothing dependable is documented — not because it makes no difference.

  • boiledReduces phytohaemagglutinin

    A full rolling boil for at least ten minutes destroys the lectin in any dry common bean. Low-temperature cooking does not, and can make matters worse.

  • cookedIncreases resistant starch

    Cooking and then cooling raises resistant starch through retrogradation; much of it survives reheating.

  • soakedReduces oligosaccharides and phytate

    Soaking with the water discarded leaches some of the gas-forming sugars and lowers phytate.

Things to know

Allergies, interactions and intake concerns. Every food gets this section — a reference where everything is uniformly good is not a reference.

  • Avoid

    Undercooked common beans and phytohaemagglutinin

    Pinto beans are the same species as red kidney beans and carry the same lectin at lower levels. Soak, discard the soaking water, then boil vigorously for at least ten minutes before simmering. Slow cookers running below boiling point are specifically implicated in lectin poisonings and are not a safe substitute for that initial hard boil.

  • Worth knowing

    Refried beans and added fat and salt

    Traditional refried beans are fried in lard and tinned versions are usually well salted. The panel here describes plain dry pinto beans and does not represent those dishes.

  • Worth knowing

    FODMAPs and IBS

    Pinto beans are high in fermentable oligosaccharides and are a frequent cause of gas and bloating, especially for people with irritable bowel syndrome.

  • Worth knowing

    Phytate and mineral absorption

    Phytate reduces iron and zinc absorption from the meal; pairing beans with a vitamin C source improves non-heme iron uptake.