● Food Intelligence · Vegetable

Asparagus Glycemic Index and Calculate Your Own Glucose Response

Across 191 single-item asparagus logs, members averaged +27.3 mg/dL — but with a published GI of 15 and ~4g of net carbs per cup, the spear itself is glucose-flat. The signal in the data is the build around it: roasted asparagus with risotto or pasta runs +36.0 mg/dL (n=471), while a prosciutto-wrapped spear holds at +23.1 mg/dL (n=778) — the lowest pairing measured.

GS
Reviewed by Grace Shryack
Signos Proprietary Data·Updated May 02, 2026·10 min read

● Powered by Signos cohort dataHigh confidence · n=18,088
The swap calculator below draws on 18,088 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.
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Meal Context
Pre-meal sequence
Activity after meal
Time of day
39
of 100
Signos Glucose Score
Moderate Spike Risk
75% of members fall between +24 and +34 mg/dL
Predicted Curve · 3-hr window
1401001201401601800m30m60m90m120m150m180m+29
Peak
+29
mg/dL
Time in Range
100%
3hr window
Above 140
0m
danger zone
Swaps
0
applied
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● Key Findings · Does asparagus spike blood sugar?

No — not on its own. Asparagus carries GI 15 and GL 0, and 191 single-item logs averaged +27.3 mg/dL with 43.5% landing in the low-spike bucket. Across 191 logged meals where members ate asparagus alone, the average glucose peak was +27.3 mg/dL (median +23 mg/dL). The published GI is 15 and the glycemic load is 0 — there's effectively no fast-digest carbohydrate in a cup of asparagus. What the broader cohort actually measures is the build: roasted asparagus with risotto or pasta runs +36.0 mg/dL (n=471, +8 mg/dL above the alone baseline), while wrapping it in prosciutto pulls the peak down to +23.1 mg/dL (n=778, −5 mg/dL). Hollandaise and cheese sit neutral at −1 mg/dL. The signal isn't the spear; it's the plate.

  • ▸The carb-load effect dominates: meals with ≥60g total carbs ran 57.5% higher than the low-carb baseline (n=2,261 vs 12,914 light-carb logs, p<0.001) — the single biggest modifier in the dataset.
  • ▸Prosciutto and bacon are asparagus's best partners: wrapping a spear cut the average peak by −5 mg/dL vs. asparagus alone (treatment mean +23.1, n=778, high confidence).
  • ▸Risotto and pasta deliver the biggest carb penalty: that pairing pushed the peak to +36.0 mg/dL — a +8 mg/dL jump over the +27.9 mg/dL alone baseline across 471 logs.
  • ▸Morning timing lowers the spike: asparagus logged before 10am averaged 27.1% lower peaks than the rest of the day (CI: −8.53 to −6.81 mg/dL, n=1,171, p<0.001).
● Signos Rules

Three citable insights from this recipe's data

Rule 1
"The Carb-Base Penalty"
+8 mg/dL vs. alone
Pairing asparagus with risotto, pasta, or orzo pushed the average peak to +36.0 mg/dL — a +8 mg/dL jump over the alone baseline of +27.9 mg/dL across 471 matched logs (medium confidence). Asparagus itself contributes effectively zero fast-digest carbs (GI 15, GL 0); the entire delta comes from the rice or noodle base. At the meal level, builds with ≥60g total carbs ran 57.5% above the low-carb baseline (p<0.001).
Rule 2
"The Prosciutto Discount"
−5 mg/dL vs. alone
Wrapping asparagus in prosciutto or bacon dropped the average peak to +23.1 mg/dL — the lowest pairing in the cohort (n=778, high confidence). Cured pork adds protein and fat without carbohydrate, slowing gastric emptying without contributing glucose. Salmon, chicken, and steak pairings showed a smaller but directionally consistent effect (−1 mg/dL, n=10,088).
Rule 3
"The Morning Edge"
−27% peak
Asparagus logged before 10am averaged 27.1% lower peaks than the rest of the day (n=1,171 morning logs vs. n=15,578, p<0.001, CI: −8.53 to −6.81 mg/dL). Breakfast logs averaged just +20.8 mg/dL — the lowest meal-time slot — versus +28.6 mg/dL for dinner. Earlier insulin sensitivity likely drives the gap, though the effect is observational.
● Curious about your own?

Curious how your body responds to asparagus specifically?

Across 191 logged meals where members ate asparagus alone, the average glucose peak was +27.3 mg/dL — but the IQR spans 25.5 mg/dL (p25: +13, p75: +38.5), meaning individual responses vary widely. Your own result depends on meal context, pairing choices, and metabolic state. A CGM tells you which side of that range you actually land on.

Learn how Signos works
Why this meal spikes

This meal stacks 3 independent spike drivers — together they account for +28 mg/dL.

Driver 1
Meal-level carbohydrates (rice, pasta, grain bases)
+8 mg/dL
The dominant lever: meals with ≥60g carbs ran 57.5% higher than low-carb logs (p<0.001, n=2,261 vs 12,914). Asparagus itself is GI 15 / GL 0 — every point of escalation comes from what it's plated with.
Driver 2
Sugar load in sauces and dressings (≥20g)
+4 mg/dL
High-sugar pairings raised peaks 39.9% above the low-sugar baseline (n=1,841, p<0.001). Glazed, teriyaki, or honey-mustard preparations land here — the spear stays flat, the sauce doesn't.
Driver 3
Individual glucose variability (IQR 24 mg/dL)
+6 mg/dL
The interquartile range spans 24 mg/dL (p25: +14, p75: +37 mg/dL), meaning personal metabolic state — insulin sensitivity, sleep, stress — accounts for a substantial portion of any single reading.
● Which bucket are you in?

Some members spike +23.1 mg/dL. Others spike +40.8. 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 asparagus is how cleanly the spear disappears from the data. Across 191 single-item logs the mean was +27.3 mg/dL — almost identical to single-item meals of much higher-carb foods — but with a published GI of 15 and GL of 0, the spear itself can't be doing that work. The signal is entirely the build. Wrap it in prosciutto: +23.1 mg/dL. Plate it with risotto: +36.0 mg/dL. Asparagus is the messenger, not the cause.
— Signos Data Science Team

Why this happens, physiologically

Asparagus is a near-zero-carb vegetable — published GI 15, GL 0, with roughly 4g of net carbs per cup — so its modest +27.3 mg/dL average across 191 single-item logs is driven almost entirely by what surrounds it on the plate. The single biggest lever measured in the broader 18,088-meal cohort is total meal carb load: meals with ≥60g of carbs ran 57.5% higher than the low-carb baseline (n=2,261, p<0.001), and the carb-bucket analysis shows a near-linear escalation from +24.3 mg/dL in light (0–40g carb) meals to +40.8 mg/dL in very-heavy (110g+) meals — a 67.9% jump. High-sugar pairings (≥20g) added another 39.9% on top of the low-sugar baseline (n=1,841). The mechanism is observational, not causal — but the pattern is consistent with asparagus acting as a passive carrier whose glucose response is set by its companions, not its own carbohydrate.

● Three mechanisms explain asparagus's glucose range

Meal carb load, sugary sauces, and protein co-ingestion each drive measurable shifts in asparagus's glucose response

  1. Mechanism 1
    +57.5%
    High carb co-load
    Meals logged with ≥60g total carbs showed peaks 57.5% above the low-carb baseline (n=2,261, p<0.001). With GI 15 and GL 0, asparagus contributes near-zero carbs — every point of that escalation comes from rice, pasta, or bread on the plate.
  2. Mechanism 2
    +39.9%
    High-sugar pairings
    High-sugar pairings (≥20g) raised peaks 39.9% above the low-sugar baseline (n=1,841, p<0.001). Glazes, teriyaki, and sweet dressings dominate this bucket — the spear can't blunt sucrose.
  3. Mechanism 3
    −5 mg/dL
    Prosciutto wrap
    Wrapping asparagus in prosciutto or bacon cut the peak to +23.1 mg/dL vs. the +27.9 mg/dL alone baseline (n=778, high confidence). Protein and fat slow gastric emptying without adding carbohydrate.
● Fit Check
Asparagus is a glucose-flat vegetable that does almost nothing on its own — your meal context decides everything.
✓ This is for you if
  • ▸You eat asparagus as a standalone side. Single-item logs averaged +27.3 mg/dL, with 43.5% of responses in the low range and a published GI of 15.
  • ▸You wrap asparagus in prosciutto or bacon. That pairing dropped the peak by −5 mg/dL vs. alone in 778 matched logs — the lowest cohort pairing measured.
  • ▸You keep total meal carbs under 40g. Light-carb asparagus meals averaged just +24.3 mg/dL across 12,914 logs — the lowest carb bucket in the cohort.
  • ▸You eat asparagus before 10am. Morning logs averaged +20.8 mg/dL — 27.1% below the rest of the day (n=1,171, p<0.001).
✗ Not for you if
  • ▸You serve asparagus over risotto or pasta. That pairing added +8 mg/dL over the alone baseline across 471 matched logs (treatment mean +36.0 mg/dL).
  • ▸You build a high-carb plate around it (110g+ carbs). Very-heavy-carb meals averaged +40.8 mg/dL — 67.9% above the light-carb baseline of +24.3 mg/dL.
  • ▸You rely heavily on sweet glazes or teriyaki sauces. High-sugar pairings (≥20g) ran 39.9% above the low-sugar baseline across 1,841 logs.
  • ▸You expect steamed asparagus to behave like roasted. The small steamed sub-cohort (n=55, low confidence) ran +7.1 mg/dL above the roasted anchor — directional only.
● How it fits your day

Calorie band and pairings (member-measured)

Per serving
27–520 kcal
Ranges from a 1-cup raw stalk (~27 kcal) to a full risotto-and-asparagus plate (~520 kcal); single-item logs averaged 250 kcal.
● Pair before
  • ▸Wrap asparagus in prosciutto or bacon: that pairing trimmed the peak by −5 mg/dL vs. alone (n=778, high confidence).
  • ▸Keep total meal carbs under 40g: light-carb asparagus meals averaged +24.3 mg/dL vs. +40.8 mg/dL in the 110g+ carb bucket — a 67.9% escalation.
● Pair after
  • ▸Time a 15–20 min walk after risotto- or pasta-based asparagus meals, which averaged +36.0 mg/dL — the highest pairing spike in the cohort.
  • ▸If dinner is asparagus-heavy, note that dinner logs averaged +28.6 mg/dL vs. breakfast logs at +20.8 mg/dL — favor morning timing when possible.
● Avoid pairing
  • ▸Avoid pairing asparagus with risotto or pasta as the carb base: that combination added +8 mg/dL over the alone baseline (treatment mean +36.0 mg/dL, n=471).
  • ▸Avoid sweet glazes (teriyaki, honey-mustard) — high-sugar pairings ran 39.9% above the low-sugar baseline across 1,841 matched logs.
● 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: How asparagus's glucose response compares to other low-GI vegetables and pairing partners
Broccoli Glycemic Index & Glucose Score
Broccoli is another low-GI cruciferous side with a comparable single-item profile — see how the cohort measures it across the same pairing slots.
Brussels Sprouts Glycemic Index & Glucose Score
Brussels sprouts share asparagus's low-GI signature; the cohort cuts show how roasted vs. steamed and the bacon-wrap pattern repeats here.
Kale Glycemic Index & Glucose Score
Kale rounds out the low-GL leafy/vegetable picture — useful comparison for how grain-bowl pairings shift any green vegetable's measured response.
Salmon Glycemic Index & Glucose Score
Salmon is asparagus's most popular protein partner; the salmon/chicken/steak slot held the meal mean at +27.2 mg/dL across 10,088 logs.
Cheddar Glycemic Index & Glucose Score
Cheddar sits in the hollandaise/cheese slot at −1 mg/dL — see the broader cheese-cohort numbers and how it stacks against asparagus's other pairings.
Track Your Asparagus Response with Signos →
See how your glucose reacts to asparagus alone vs. with risotto, prosciutto, or salmon — CGM data, personalized to you.

Frequently Asked Questions

Methodology

This page draws on 191 single-item asparagus logs (meals where asparagus was logged alone, no pairings) from 152 unique Signos members, plus a broader 18,088-meal cohort spanning all meal contexts where asparagus appeared (6,173 unique members), collected through the Signos production CGM platform. Data were filtered to postprandial glucose responses (PPGR) between 0 and 100 mg/dL to exclude sensor artifacts and implausible readings. Modifier effects were estimated using Welch's t-test on matched pairs against a defined baseline; all reported effects carry p<0.001 unless noted. We report mean glucose peak across a right-skewed distribution — the median single-item spike of +23 mg/dL is a few mg/dL lower than the mean of +27.3 mg/dL, which is typical for this type of data. Asparagus was identified using a regex matching the stalk word as a primary ingredient. Any carb-pair pairing slot requires at least 100 matched meals before it appears in the recipe builder.

Limitations

  • Self-reported portion sizes introduce measurement error — a logged "1 cup" of roasted asparagus may vary in actual weight, affecting per-serving spike accuracy.
  • Cohort skews health-motivated; Signos members actively tracking glucose tend to eat more mindfully than the general population, so real-world average spikes may differ.
  • The steamed/boiled form sub-cohort is small (n=55) and carries low confidence — its reported +7.1 mg/dL delta vs. roasted should be treated as directional only, not statistically firm.
  • The risotto/pasta carb-pair sub-cohort has medium confidence (n=471); treat its +8 mg/dL delta as directional pending a larger sample.
  • Modifier analyses reflect meal-level correlations, not controlled feeding trials — causality cannot be established from observational CGM data alone.
  • Single-item asparagus logs are uncommon (n=191) because asparagus is almost always served as a side; the broader 18,088-meal cohort is more representative of how asparagus appears in real meals.
● Get your own data

See your own asparagus response

Across 191 logged meals where members ate asparagus alone, the average glucose peak was +27.3 mg/dL — but the IQR spans 25.5 mg/dL, meaning your personal response could land well above or below that. What you pair with asparagus matters more than the spear: risotto adds +8 mg/dL, while a prosciutto wrap cuts the peak by −5 mg/dL. A CGM shows you exactly where you land and which builds work best for your biology.

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