Are Beans and Legumes Low Glycemic?
Beans and lentils are among the lowest glycemic foods there are — and swapping them in for rice or potato measurably lowers the glucose response.
"Are kidney beans and great northern beans ok? How about chili?"
Yes to all three, and legumes are among the best carbohydrate choices available.
Why they behave so well
Lentils sit around 32 on the glycemic index, chickpeas around 28 — comfortably in the low range and among the lowest of any carbohydrate food.
Three things do it: a high proportion of slowly digested starch, a lot of soluble fiber, and a genuine protein content. Beans arrive with their own brakes fitted.
The swap that's been measured
This is the useful part. A randomized crossover trial found that replacing the carbohydrate in a meal — rice or potato — with lentils significantly reduced the post-meal glucose response in healthy adults.
That's not "beans are healthy" in the abstract. That's a direct substitution producing a measurable change in the same meal.
On chili
Chili is close to an ideal low glycemic meal without anyone designing it that way. Beans, meat, tomatoes, onions, spices — protein, fiber, and slow carbohydrate together in one pot.
The things to watch are the sides rather than the chili: a large portion of white rice, or cornbread, will do more than the chili itself. Serve it on cauliflower rice, or with a modest half-cup of basmati, or simply in a bowl with sour cream and avocado.
Canned versus dried
Canned is fine. Rinse them — it removes a good share of the added sodium — and you've lost nothing that matters for blood sugar.
Dried are cheaper and let you control the salt entirely, but the difference is not worth the barrier if soaking beans overnight is the thing that stops you eating them.
If beans bother your digestion
Common, and usually manageable. Rinse canned beans thoroughly, start with smaller portions and build up, and try lentils before larger beans — they're generally the gentlest. If you have IBS or SIBO, this belongs with whoever manages that rather than with a general article.
Try this week: swap half the rice or potato in one meal for lentils or beans. Same dish, and the change has been measured.
Education, not medical advice.
Sources
- Atkinson FS, Brand-Miller JC, Foster-Powell K, et al. International tables of glycemic index and glycemic load values 2021: a systematic review. *American Journal of Clinical Nutrition* 2021;114(5):1625–1632 View source
- Moravek D, Duncan AM, VanderSluis LB, et al. Carbohydrate replacement of rice or potato with lentils reduces the postprandial glycemic response in healthy adults in an acute, randomized, crossover trial. *Journal of Nutrition* 2018;148(4):535–541 View source