Red Kidney Beans (Boiled, Drained)
Legumes & Tofu · Legumes
Boiled, drained red kidney beans have a low FODMAP serving of 14 g, approximately one tablespoon. The Monash app lists 17 g as moderate and 175 g, about one cup, as high. These ratings apply to properly prepared cooked beans, not to uncooked dried kidney beans.
Serving sizes for red kidney beans (boiled, drained)
Portions are cooked and drained: 14 g low, 17 g moderate and 175 g high. The green portion is roughly one tablespoon.
Tested serving sizes
| Serving | Amount | Main FODMAP | Rating |
|---|---|---|---|
| 1 cup | 175 g | GOS 1.03 g | |
| 1 tablespoon | 14 g | GOS 0.08 g | |
| 17 g portion | 17 g | GOS 0.1 g |
Breakdown for 1 cup
Is red kidney beans (boiled, drained) low FODMAP?
The 17 g serving is moderate in GOS. At 175 g, GOS and fructans are both high, so a small green serving does not establish a low FODMAP rating for a bean-heavy chilli. A canned kidney-bean entry is a different preparation and should be checked separately.
Red Kidney Beans (Boiled, Drained) and IBS: what to know
When eating chilli or a mixed bean dish, account for the kidney beans in your serving as well as the recipe's other ingredients. A FODMAP rating addresses fermentable carbohydrates; it does not establish food safety. Incorrectly prepared dried kidney beans can cause illness because of lectins, which is a separate issue from IBS portion guidance.
Gut-friendly ways to eat red kidney beans (boiled, drained)
Prepare dried kidney beans safely before using this portion guide. Health Canada advises soaking for at least five hours, discarding that water and boiling the soaked beans vigorously for at least ten minutes; follow the packet's further cooking instructions. Do not rely on a slow cooker to cook dried red kidney beans. Once fully cooked, drain and weigh the beans for your meal.
Frequently asked questions
Does a green rating mean kidney beans can be eaten uncooked?
No. The green result is for 14 g of boiled, drained red kidney beans. Safe preparation of dried kidney beans remains essential because their lectins are unrelated to the FODMAP traffic lights.
Can I use a slow cooker for dried red kidney beans?
Health Canada advises against cooking dried red kidney beans in a slow cooker because it may not reach the temperature required to destroy lectins. Follow safe soaking and vigorous-boiling guidance before considering portion size.
Is a cup of boiled kidney beans low FODMAP?
The app's 175 g cup-sized serving is high in GOS and fructans. The low reference portion is 14 g, so a full cup should not inherit the green label.
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Sources and editorial notes
- Monash University FODMAP Diet App
App entry checked directly on 27 September 2026: Bean, red kidney, boiled, drained. Supports the listed portion weights, traffic-light ratings and FODMAP groups. The exact compound quantities shown in the catalogue breakdown were not verified by this app check.
- Health Canada: Lectins in Dry Legumes
Supports the separate food-safety advice for dried red kidney beans: soaking, discarding soaking water, vigorous boiling and avoiding slow cookers for cooking dried kidney beans.