Peas and onion is a classic vegetable combination offering lean protein, fiber, and antioxidant compounds with a low caloric density suitable for longevity-focused diets.
HeartBlood SugarInflammationWeightBoneProteinGut
Nutrition per ~85 g · 1 onion
Form
43kcal
Protein2.8 g
Carbs7.3 g
Fat0.3 g
Fiber2.0 g
5.3 g net carbs after fiber.
Vitamins
Vitamin B60.16 mg10%
Thiamin85 mcg7%
Niacin1.1 mg7%
Folate22.9 mcg6%
Riboflavin59.5 mcg5%
Vitamin C2.5 mg3%
Vitamin A137 iu3%
Pantothenic Acid0.14 mg3%
Vitamin A6.8 mcg1%
Minerals & other
Sodium376 mg16%
Copper85 mcg9%
Manganese0.22 mg9%
Zinc0.49 mg4%
Iron0.74 mg4%
Phosphorus43.4 mg3%
Magnesium13.6 mg3%
Potassium81.6 mg2%
Calcium14.4 mg1%
Selenium0.34 mcg1%
Saturated Fat0.058 g—
Monounsaturated Fat0.031 g—
Polyunsaturated Fat0.15 g—
Bioactives estimated
Quercetin~13 mg
Inulin / Prebiotic fibre~2.5 g
Polyphenols~128 mg
Representative amounts for this food, not measured for this item. Real content varies widely by variety, ripeness and storage.
What drives the score weighted inputs
Nutrient density31.6/35Vitamins and minerals relative to calories — the single biggest driver.
Protein quality10.6/15How much protein it delivers, by absolute grams and per calorie.
Bioactives12.8/15Polyphenols, flavonoids and other beneficial plant compounds.
Fiber9.3/10Dietary fiber for gut health, satiety and steadier blood sugar.
Healthy fats5.0/10Fat quality — unsaturated against saturated, and trans-fat free.
Glycemic impact10.0/10Low sugar with a high fiber-to-carb ratio scores best.
These are the scored components, not a sum: the published score also reflects normalisation across the catalog, so the parts above will not add to 89.
MethylationAntioxidantATP / MitoBoneThyroidCollagenNeurotransmitterDetoxGlucoseHematopoiesisLipidsGut MicrobiomeClottingHPA AxisGlycolysisβ-OxidationKetogenesisNAD⁺mTORAMPKUrea CycleDopamineSerotoninSteroidogenesisVitamin D ActivationInsulin Signaling
Overview
Peas and onion represent a traditionally paired vegetable combination found across European, Asian, and North American cuisines. Peas contribute plant-based protein (3.28g per 100g), making them one of the higher-protein vegetables, while delivering dietary fiber essential for gut microbiome health and satiety. Onions provide quercetin, a flavonoid with documented anti-inflammatory properties. Together, this combination delivers niacin (1.28mg) for metabolic function and iron (0.87mg) for oxygen transport. The relatively high sodium content (442mg) suggests this may be measured in processed or cooked preparations; fresh versions contain less. For longevity, the fiber-to-calorie ratio (2.3g fiber per 51 calories) supports healthy aging by promoting stable blood glucose, reducing cardiovascular disease risk, and supporting healthy weight maintenance. The polyphenol content from onions has been associated with reduced inflammation markers in aging populations. This combination is particularly valuable in plant-forward diets for meeting protein needs while maintaining metabolic flexibility.
Health benefits 5
Supports cardiovascular health through fiber and quercetin contentstrong
Dietary fiber reduces LDL cholesterol absorption; quercetin in onions inhibits oxidative stress and platelet aggregation, reducing atherosclerosis risk
Promotes glycemic control and stable blood sugarstrong
High fiber content slows carbohydrate absorption; resistant starch in cooled peas improves insulin sensitivity
Supports healthy aging through anti-inflammatory effectsmoderate
Quercetin and other phenolic compounds reduce pro-inflammatory cytokines implicated in aging and age-related diseases
Enhances satiety and supports healthy weight maintenancemoderate
Combination of protein and fiber increases gastric distension signals and promotes prolonged satiety hormones
Supports bone mineralization through micronutrient densitymoderate
Phosphorus, magnesium, and small amounts of calcium work synergistically in bone matrix formation
Pairs with
Pair with olive oil because fat-soluble absorption of quercetin and fat-soluble vitamins increases dramatically with dietary fat
Combine with leafy greens like spinach because the vitamin C (3mg) enhances non-heme iron absorption from the combination
Pair with whole grains (brown rice, quinoa) because complementary amino acids create a complete protein profile superior to either alone
Combine with garlic and turmeric because allicin and curcumin amplify anti-inflammatory effects through polyphenol synergy
In the kitchen
Refrigerate fresh peas and onion separately; use within 3-5 days for maximum nutrient retention and quercetin stability
Cook peas briefly (3-5 minutes) rather than prolonged boiling to preserve heat-sensitive vitamin C and water-soluble B vitamins
Cool cooked peas to room temperature before consuming to increase resistant starch content, which acts as a prebiotic for gut health
Select firm, small onions with papery skin and no soft spots; store in cool, dark, well-ventilated areas away from potatoes
Consume the combination with a source of fat (olive oil, nuts) to maximize absorption of fat-soluble compounds and quercetin
When to eat it midday
The protein and fiber combination provides sustained energy and satiety through afternoon; midday consumption allows better glucose stability for post-lunch energy dip. Timing allows adequate time for prebiotic resistant starch to reach the colon.
Breaks a fast
Can be consumed anytime except during strict fasting windows due to caloric and macronutrient content