NUTRITIONAL LOG

The Truth About Barley

A Deep-Research Journal

Dr. Aria Vance
Dr. Aria Vance Lead Nutrition Data Scientist
Last Reviewed: Jun 3, 2026 • Data Sources: USDA FoodData Central, NutriSnap Volumetric Models

Structured Nutritional Data & Citations

Nutritional Profile: Hulled Barley, Cooked (Water, Boiled, without salt)

Metric Per 100g Per Standard Serving (1 cup, ~157g) Notes
Calories 123 kcal 193 kcal Energy content derived primarily from complex carbohydrates.
Macronutrients
Protein 4.5 g 7.1 g A good source of plant-based protein, contributing to satiety and muscle repair.
Carbohydrates 28.2 g 44.3 g Predominantly complex carbohydrates. Includes significant dietary fiber.
Dietary Fiber 5.5 g 8.6 g Rich in soluble fiber (beta-glucans) and insoluble fiber, beneficial for digestion and cardiovascular health.
Sugars 0.2 g 0.3 g Negligible sugar content.
Fat 0.4 g 0.6 g Very low in fat, primarily unsaturated fatty acids.
Key Micronutrients (% Daily Value for 1 cup serving, based on 2000 kcal diet)
Manganese 0.45 mg (23% DV) 0.71 mg (35% DV) Essential cofactor for many enzymes, bone development, and antioxidant defenses.
Selenium 10.3 µg (19% DV) 16.2 µg (29% DV) Important for thyroid function, DNA synthesis, and protection from oxidative damage.
Copper 0.16 mg (18% DV) 0.25 mg (28% DV) Crucial for energy production, iron metabolism, and nervous system function.
Magnesium 38 mg (9% DV) 60 mg (14% DV) Involved in over 300 enzymatic reactions, muscle and nerve function, blood glucose control, and blood pressure regulation.
Phosphorus 113 mg (9% DV) 177 mg (14% DV) Integral for bone and teeth formation, and plays a vital role in how the body uses carbohydrates and fats.
Niacin (B3) 2.3 mg (14% DV) 3.6 mg (23% DV) Supports metabolism, nervous system, and digestive system.
Thiamine (B1) 0.11 mg (9% DV) 0.17 mg (14% DV) Essential for converting carbohydrates into energy.
Iron 1.3 mg (7% DV) 2.0 mg (11% DV) Critical for oxygen transport and energy production.
Zinc 0.9 mg (8% DV) 1.4 mg (13% DV) Supports immune function, protein synthesis, and wound healing.
Antioxidants Contains phenolic acids, flavonoids, tocols, and beta-glucans, which exhibit antioxidant properties, protecting against oxidative stress and inflammation.
Functional Impact
Glycemic Index (GI) Low (20-30) N/A The low GI is due to high fiber content, particularly beta-glucans, which slow glucose absorption. Values can vary slightly based on processing and cooking method.
Glycemic Load (GL) Low (for 100g: ~6) Low (for 1 cup: ~10-13) A serving of cooked hulled barley results in a low glycemic load, suitable for blood glucose management.
Satiety Score High N/A High fiber and protein content contribute to prolonged feelings of fullness, aiding in appetite regulation and weight management.
Physical Properties
Density (Cooked) ~0.95 g/cm³ N/A Reflects significant water absorption during cooking; approaches the density of water.
Volumetric Expansion (dry:cooked) N/A ~3.5-4.0x 1 cup dry hulled barley yields approximately 3.5 to 4 cups cooked, indicating substantial volumetric expansion due to water uptake. No "contraction" occurs in the standard cooking process.

Citations & References:

  1. USDA FoodData Central. Food ID: 170420 (Barley, hulled, cooked, water, boiled, without salt). U.S. Department of Agriculture. Accessed [Insert Date of Access]. Available at: https://fdc.nal.usda.gov/fdc-app.html#/food-details/2708361/nutrients
  2. Foster-Powell, K., Holt, S.H.A., & Brand-Miller, J.C. (2002). International table of glycemic index and glycemic load values: 2002. The American Journal of Clinical Nutrition, 76(1), 5-56. (General reference for GI values, specific barley values confirmed by subsequent research).
  3. National Academies of Sciences, Engineering, and Medicine. (2019). Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. The National Academies Press. Washington, DC.

Field Notes: Dr. Aria Vance

Subject: Barley
Focus: Volumetric expansion/contraction, historical context, tracking challenges.

The Manual Tracking Problem with Barley

Barley. An ancient grain. Sustainer of civilizations from the fertile crescent to Roman legions, who, interestingly enough, were dubbed 'hordearii' — the barley eaters. My notes here are not about ancient history, fascinating as it is, but about the abysmal state of modern nutritional tracking, especially for foods like this unassuming, yet nutritionally potent, cereal.

The challenge? Simplicity itself. You see a bowl. You see barley. Good luck accurately logging it. The sheer variability is maddening. Is it hulled? Pearled? These aren't minor distinctions; they dramatically alter fiber content, hence caloric density, and crucially, impact on blood sugar. A hulled grain is a nutritional powerhouse. Pearled? Not so much. But visually? Unless you're a grain aficionado, and let's be honest, who really is at 7 AM, it's a toss-up.

Then there's the cooking. Oh, the cooking! This isn't like a fixed mass of beef or a measured spoon of olive oil. Barley is a sponge. It absorbs water. A lot of water. The density changes. The volume explodes. One cup dry becomes three-and-a-half cooked. Maybe four if it’s feeling thirsty. The final weight, and therefore the nutrient profile per visual serving, is a function of cooking time, water ratio, even the stovetop's temperament. That half-cup in your stew? Is it actually half a cup of cooked barley, or is it half a cup of the stew containing barley, a volumetric quagmire of broth and absorbed liquid? The error margins here aren't just margins; they're craters.

My exasperation stems from years of watching people try. They use a standard measuring cup. They weigh raw ingredients (good for them!). But once that barley hits the pot, once it swells into a hearty stew or a robust salad, all precision vanishes. The raw ingredient barcode, a fleeting moment of truth, becomes utterly irrelevant. Who carries a scale to the dining table for their minestrone? Nobody. Not a soul. It’s a behavioral non-starter for sustainable tracking. This is why self-reported dietary data is so… flaky.

The entire process, the human intervention required for accurate logging, is fundamentally broken for complex, variable foods. It's an archaic system trying to wrestle with culinary reality. This nutritional enigma, this culinary chameleon, barley, highlights the glaring deficiencies.

That's why NutriSnap isn't just a convenience; it's a necessity. It’s a forensic visual analyst for your plate. The AI can infer the type of grain, estimate the cooked volume within a mixed dish, even account for variations in moisture content. It cuts through the manual guesswork, the volumetric chaos. Finally, we can measure what people actually eat, not just what they think they eat. It's not just a photograph; it's data liberation.

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