● Food Intelligence · Legumes

Beans Glycemic Index and Calculate Your Own Glucose Response

Across 4,243 single-item bean logs, Signos members averaged a +30.5 mg/dL glucose peak — already below rice (+44.2 mg/dL) and chips (+38.9 mg/dL). Pair beans with a light carb load and the average drops to +28.8 mg/dL; pile on 110g+ of carbs and it climbs to +48.7 mg/dL.

GS
Reviewed by Grace Shryack
Signos Proprietary Data·Updated May 2, 2026·10 min read

● Powered by Signos cohort dataHigh confidence · n=4,243
The swap calculator below draws on 82,276 matched-pair logs — a broader cohort than the page's single-item primary, used to give every ingredient swap statistical power. Welch's t-test on matched pairs, not third-party glycemic-index tables. Each swap shows its sample size and confidence tier inline.
● FREE SIGNOS TOOL

Build Your Own Low GI Recipe

Powered by 4,243
Signos food logs

Tap any ingredient below to swap it for a glucose-friendlier alternative. Your Signos Glucose Score, predicted curve, and nutrition update in real-time. Every swap is data-backed by real CGM response measurements.

Ingredients — Tap to Swap
Meal Context
Pre-meal sequence
Activity after meal
Time of day
100
of 100
Signos Glucose Score
Very High Spike Risk
75% of members fall between +132 and +190 mg/dL
Predicted Curve · 3-hr window
1401001201401601802000m30m60m90m120m150m180m+161
Peak
+161
mg/dL
Time in Range
56%
3hr window
Above 140
80m
danger zone
Swaps
0
applied
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● Sibling page · ranked by glucose impact
10+ Most Popular Low GI Beans Recipes →
See every recipe Signos members logged for beans, ranked from lowest-spike to highest. 12 recipes total.
● Key Findings · Do beans spike blood sugar?

Yes — moderately. Across 4,243 logged meals where beans were eaten alone, the average glucose peak was +30.5 mg/dL, with 41.7% of responses exceeding +30 mg/dL. In our single-item cohort of 4,243 bean logs, the median peak was +26 mg/dL and 38.1% of responses stayed in the low tier (under +20 mg/dL) — a wide spread that reflects real individual variability. This page covers kidney, pinto, navy, refried, and green peas; black beans, lentils, chickpeas, soybeans, and baked beans each have their own sibling pages with independently measured cohorts. The single biggest lever across the umbrella cohort is total meal carb load: light-carb builds (0–40g) averaged +28.8 mg/dL while very heavy builds (110g+ carbs) hit +48.7 mg/dL — a 69% escalation. These are observational patterns, not causal claims.

  • ▸Total carb load is the dominant lever: very heavy meals (110g+ carbs) averaged +48.7 mg/dL — 69% above the light-carb baseline of +28.8 mg/dL.
  • ▸Swapping white rice (+43 mg/dL, n=2,585) for cauliflower rice (+27 mg/dL, n=497) in a beans bowl cuts the grain-side peak by ~16 mg/dL in matched logs.
  • ▸Morning timing is protective: bean meals eaten before 10am averaged 16.7% lower peaks than the rest-of-day baseline (n=6,800 morning logs, p<0.001).
  • ▸Olive oil drizzle tracked at +28.4 mg/dL vs sour cream's +37.6 mg/dL — a −9.2 mg/dL difference in matched fat-pairing logs (n=4,119 vs n=3,428).
● Signos Rules

Three citable insights from this recipe's data

Rule 1
"The Carb-Load Penalty"
+51% peak
When beans appear in meals with 60g or more of total carbs, the glucose peak jumps 51.1% above the low-carb baseline — the single biggest lever in the beans dataset (n=20,560, p<0.001). That's the gap between a +28.8 mg/dL light-carb meal and a +48.7 mg/dL very-heavy-carb meal. Rice, tortilla chips, or large grain portions alongside beans are the most common culprits for crossing that threshold.
Rule 2
"The Cauliflower Discount"
−16 mg/dL peak
Swapping white rice for cauliflower rice in a beans bowl drops the grain-side peak from +43.1 mg/dL to +27.3 mg/dL — a 15.9 mg/dL reduction across matched logs (n=497 cauliflower rice vs n=2,585 white rice). Brown rice and quinoa also help, cutting 2.2–5.2 mg/dL respectively, but cauliflower rice delivers by far the largest single grain-swap benefit.
Rule 3
"The Morning Edge"
−17% peak
Beans eaten before 10am produce a 16.7% lower glucose peak than the same food later in the day — a CI of [−6.33, −5.37] mg/dL across 6,800 morning logs (p<0.001). Breakfast timing consistently outperforms dinner (avg +35.2 mg/dL across 38,600 logs). Timing beans as the first substantial meal of the day appears to blunt the response most reliably — an observational pattern consistent with improved morning insulin sensitivity.
● Curious about your own?

Curious how your body responds to beans specifically?

Across 4,243 logged meals where members ate beans alone, the average glucose peak was +30.5 mg/dL — but the IQR spans 27 mg/dL (p25: +15, p75: +42), meaning your personal response could look very different from the cohort mean. Carb load at the meal, fat pairings, and even the time of day all shift the outcome measurably. A CGM makes that variability visible in real time.

Learn how Signos works
Why this meal spikes

This meal stacks 3 independent spike drivers — together they account for +158 mg/dL.

Driver 1
Digestible starch (~35g net carbs per single-item meal)
+21 mg/dL
Beans' starch backbone — averaging ~35g carbs in single-item logs — is the primary glucose driver. At a light (0–40g) carb load, the mean peak is +28.8 mg/dL; that's the starch floor before any meal-level amplifiers take effect.
Driver 2
Total meal carb load (≥60g threshold)
+18 mg/dL
When total meal carbs hit ≥60g, peaks jump 51% above the low-carb baseline (n=20,560, p<0.001). This is the single largest modifier measured — the carb context around the beans matters as much as the beans themselves.
Driver 3
High sugar co-loading (≥20g sugars in meal)
+9 mg/dL
Meals with ≥20g sugar alongside beans showed peaks 28.7% higher than the low-sugar baseline (n=9,785, p<0.001). Fast-digesting sugars accelerate the glucose curve before bean fiber can slow absorption.
● Which bucket are you in?

Some members spike +28.8 mg/dL. Others spike +48.7. The only way to know how you'll spike is to measure with a Signos CGM.

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● What surprised us
What surprised us about beans is how much the rest of the plate moves the number — not the variety. Across our single-item cohort of 4,243 bean logs, kidney, pinto, refried, and green beans all cluster within a few mg/dL of each other at the baseline. But bring in white rice and the paired peak jumps to +43.1 mg/dL; swap that for cauliflower rice and it falls to +27.3 mg/dL. The bean type is almost irrelevant compared to what you stack around it.
— Signos Data Science Team

Why this happens, physiologically

Beans are a moderate-GI food whose glucose response is shaped primarily by total meal carbohydrate load. Across 4,243 single-item logs, the average peak was +30.5 mg/dL — but that number moves sharply with context. Meals in the light carb bucket (0–40g) averaged +28.8 mg/dL, while very heavy meals (110g+ carbs) hit +48.7 mg/dL — a 69% escalation driven almost entirely by what surrounds the beans, not the beans themselves. Morning timing offers a modest but real buffer: beans eaten before 10am ran ~17% lower than the all-day baseline (CI: [−6.33, −5.37] mg/dL, p<0.001), an observational pattern consistent with improved morning insulin sensitivity.

● Three levers explain the cohort range

Total carb load, meal timing, and fat pairings together drive beans' wide glucose range from +29 to +49 mg/dL

  1. Mechanism 1
    +51%
    High-carb meal load
    Beans eaten in meals with ≥60g total carbs produced peaks 51.1% higher than the low-carb baseline (n=20,560, p<0.001). The beans themselves are not the problem — the rice, tortillas, or chips alongside them are.
  2. Mechanism 2
    −17%
    Morning timing benefit
    Meals logged before 10am averaged 16.7% lower peaks than daytime meals (n=6,800, p<0.001). Enhanced early-day insulin sensitivity appears to blunt the bean-carb response — breakfast logs averaged +30.4 mg/dL vs. dinner's +35.2 mg/dL.
  3. Mechanism 3
    −9 mg/dL
    Fat-swap benefit
    Replacing sour cream with olive oil cut the fat-side peak from +37.6 mg/dL to +28.4 mg/dL — a 9.2 mg/dL reduction in matched logs (n=4,119 vs n=3,428). Avocado produced nearly the same discount at −8.1 mg/dL (n=4,834).
● Fit Check
Beans are a low-GI food that rewards thoughtful build choices — the right pairings push peaks well below the cohort average, while high-carb builds can drive them nearly 70% higher.
✓ This is for you if
  • ▸You eat beans at breakfast or as a morning snack. Morning timing (before 10am) is linked to a 16.7% lower peak across 6,800 logs — the strongest timing lever in the dataset.
  • ▸You swap white rice for cauliflower rice as your grain side. That single swap drops the grain-side peak from +43.1 mg/dL to +27.3 mg/dL in matched logs (n=497).
  • ▸You drizzle olive oil instead of sour cream. Olive-oil-paired logs averaged +28.4 mg/dL vs +37.6 mg/dL for sour cream — a −9.2 mg/dL difference in matched pairs (n=4,119).
  • ▸You keep total meal carbs under 40g. The light-carb bucket averaged just +28.8 mg/dL — 69% lower than the very-heavy bucket (110g+ carbs) at +48.7 mg/dL.
✗ Not for you if
  • ▸You load your plate with tortilla chips on the side. Meals that included tortilla chips averaged +43.6 mg/dL — well above the single-item beans baseline of +30.5 mg/dL (n=1,267).
  • ▸You eat beans in a very heavy-carb meal (110g+ carbs). That bucket averaged +48.7 mg/dL — a 69% escalation vs the lightest-carb build at +28.8 mg/dL.
  • ▸You add sour cream as your fat topping. Sour-cream-paired logs averaged +37.6 mg/dL vs +28.4 mg/dL for olive oil — a 9.2 mg/dL gap in matched pairs.
  • ▸You eat beans as a large afternoon snack. Afternoon-snack timing averaged +38.5 mg/dL across 806 logs — the highest meal-period peak in the dataset.
● How it fits your day

Calorie band and pairings (member-measured)

Per serving
~368–1,212 kcal
Ranges from a light bean-only meal (~368 kcal avg in the Light carb bucket) to a very heavy build with rice, chips, and toppings (~1,212 kcal avg in the 110g+ carb bucket).
● Pair before
  • ▸Choose a light carb build (0–40g total carbs): average peak is +28.8 mg/dL vs +48.7 mg/dL in the 110g+ bucket — a 69% difference.
  • ▸Eat beans at breakfast or as a morning snack: morning timing (before 10am) is linked to a 16.7% lower peak vs other meal times (n=6,800 logs).
● Pair after
  • ▸Add pickled red onions or a spinach handful: both are linked to −3 to −4 mg/dL vs the no-veggie baseline across matched logs.
  • ▸Swap white rice (+43 mg/dL) for cauliflower rice (+27 mg/dL): that single grain swap is linked to a ~−16 mg/dL reduction in matched logs (n=497).
● Avoid pairing
  • ▸Avoid the 110g+ carb build (e.g., large rice portion + tortilla chips + beans): average peak climbs to +48.7 mg/dL vs +28.8 mg/dL for a light build.
  • ▸Avoid adding tortilla chips as an extra: chip-inclusive meals averaged +43.6 mg/dL — more than 13 mg/dL above the single-item beans mean of +30.5 mg/dL.
● Quick definitions (click to expand)
mg/dL — milligrams per deciliter. The unit blood glucose is measured in. A rise of "+30 mg/dL above baseline" means blood sugar went up 30 units after the meal.
Glycemic Index (GI) — a 0–100 score for how fast a food raises blood sugar in lab tests. Under 55 = low, 56–69 = medium, 70+ = high.
Glycemic Load (GL) — GI adjusted for portion size. Under 10 = low, 10–19 = medium, 20+ = high.
CGM — Continuous Glucose Monitor. A wearable sensor that tracks blood glucose every few minutes. Signos members wear CGMs while eating meals they log.
● Related Foods: Beans is the umbrella page for kidney, pinto, navy, refried, and green peas — here are the sibling legume pages and adjacent carb-heavy foods.
Black Beans Glycemic Index and Glucose Score
Black beans now have their own atlas page with an independently measured CGM cohort — see how they compare to the broader beans umbrella.
Chickpeas Glycemic Index and Glucose Score
Chickpeas are a sibling legume page with their own Signos cohort — see how the garbanzo profile stacks up against pinto and kidney varieties.
Lentils Glycemic Index and Glucose Score
Lentils have their own sibling page — compare their independently measured glucose profile to the pinto and kidney bean cohort here.
Rice Glycemic Index and Glucose Score
Rice averages +44.2 mg/dL in our cohort — one of the most common high-carb pairings with beans, and the biggest single-swap lever in the builder.
Track Your Beans Response with Signos →
See exactly how your body responds to kidney, pinto, refried, and every build variation — in real time with a CGM.

Frequently Asked Questions

Methodology

This page draws on two cohort cuts of Signos CGM data collected between March 2025 and April 2026. The single-item cohort — meals where beans were logged alone, with no other foods — covers 4,243 logged meals from 2,260 unique members, and is the primary source for headline stats (mean peak +30.5 mg/dL, median +26.0 mg/dL). The broader cohort, which includes all meals containing beans in any context, covers 82,276 logged meals from 16,234 unique members (mean peak +34.4 mg/dL, median +31.0 mg/dL) and powers the modifier and recipe-builder analysis. This page's cohort covers kidney, pinto, navy, refried, and green peas; black beans, lentils, chickpeas, soybeans, and baked beans are excluded to their own sibling pages. All cohorts are filtered to meals with a measured glucose rise between 0 and 100 mg/dL (ppgr_case='regular'). Effect sizes across modifier slots were estimated using Welch's t-test on matched pairs; all modifier effects cited carry p<0.001 unless noted. A minimum of 100 matched meals is required for any pairing to appear in the recipe builder.

Limitations

  • Self-reported portion sizes introduce measurement noise; members logging 'a cup of beans' may vary substantially in actual quantity, directly affecting carb-load estimates.
  • The single-item cohort (n=4,243) is substantially smaller than the broader cohort — modifier-level sub-cohort analyses use the broader cohort and should be interpreted as beans-in-context effects, not pure bean effects.
  • Cohort skews health-motivated relative to the general population; members using CGMs tend to be more metabolically aware, so absolute glucose peaks may be lower than a representative sample would show.
  • The pico de gallo sub-cohort (n=354) and ACV sub-cohort (n=477) are the smallest pairing slots reported; their directional effects are statistically firm but the absolute delta estimates carry wider uncertainty than larger slots.
  • The bean-variety breakdown in the builder (pinto, refried, green beans) uses the broader cohort and may reflect meal-context confounds — varieties that commonly appear in high-carb meals will skew higher regardless of the variety itself.
  • All findings are observational. Welch's t-test identifies statistically significant associations between modifiers and glucose outcomes, but does not establish causality.
● Get your own data

See your own beans response

Across 4,243 single-item bean logs, the average glucose peak was +30.5 mg/dL — but 33.9% of those meals pushed into the high-spike tier while 38.1% stayed low. That spread isn't random: carb load alone drove a 69% escalation in peaks, from +28.8 mg/dL in light-carb builds to +48.7 mg/dL in very-heavy ones. A CGM tells you exactly which side of that range you land on — and which swaps (olive oil instead of sour cream, cauliflower rice instead of white rice) actually move the needle for your biology.

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