Structured Nutritional Data & Citations
Coffee (Brewed, Black) - Nutritional & Physical Profile
A. Caloric & Macronutrient Breakdown
(Reference: USDA FoodData Central, FDC ID: 171891, "Coffee, brewed, prepared with tap water, black")
| Nutrient | Per 100g | Per Standard Serving (240ml / 8 fl oz) |
|---|---|---|
| Energy | 1.6 kcal (7 kJ) | 3.8 kcal (16.8 kJ) |
| Protein | 0.12 g | 0.29 g |
| Carbohydrates | 0 g (negligible) | 0 g (negligible) |
| - Sugars | 0 g | 0 g |
| - Fiber | 0 g | 0 g |
| Fat | 0.04 g | 0.10 g |
| - Saturated | 0.02 g | 0.05 g |
| - Monounsat | 0 g | 0 g |
| - Polyunsat | 0.01 g | 0.02 g |
| Water | 99.4 g | 238.56 g |
Note: Values are for plain black coffee. Addition of milk, sugar, creamers, or syrups significantly alters this profile.
B. Key Micronutrients & Bioactive Compounds
- Vitamins:
- Niacin (B3): Trace (0.02 mg / 100g)
- Riboflavin (B2): Trace (0.01 mg / 100g)
- Pantothenic Acid (B5): Trace (0.03 mg / 100g)
- Minerals:
- Potassium: 49 mg / 100g
- Magnesium: 7 mg / 100g
- Manganese: 0.03 mg / 100g
- Phosphorus: 7 mg / 100g
- Trace amounts of Calcium, Iron, Zinc.
- Antioxidants & Phenolic Compounds:
- Chlorogenic Acids: Predominant, contributing to antioxidant activity and potential metabolic benefits. Levels vary significantly by roast and bean type.
- Caffeine: A central nervous system stimulant, typically 30-100 mg per 100ml for brewed coffee, varying by brew method and bean.
- Melanoidins: Formed during roasting, contributing to color, aroma, and antioxidant properties.
- Diterpenes (Cafestol, Kahweol): Present in unfiltered coffee (e.g., French press), can raise LDL cholesterol. Filtered coffee significantly reduces these.
C. Functional Impact
- Glycemic Index (GI): Effectively 0 (for black coffee). No direct impact on blood glucose.
- Glycemic Load (GL): Effectively 0.
- Satiety Score: Low to moderate for plain black coffee. While caffeine can acutely suppress appetite, coffee itself provides negligible macronutrients for sustained satiety. Its effect is more psychosomatic and stimulatory.
- Thermic Effect of Food (TEF): Negligible for coffee itself, but caffeine can transiently increase metabolic rate.
D. Physical Properties
- Density: Approximately 1.002 - 1.005 g/cm³ at 20°C (for standard brewed coffee). Slightly denser than pure water due to dissolved solids.
- Volumetric Contraction after Brewing: Minimal and functionally negligible for typical consumption. Dissolved solids do not significantly alter the volume of water used for brewing, rather they displace water slightly and increase density. Evaporation during cooling could cause minor volume loss, but this is not a 'contraction' in the usual sense.
E. Citations & References
- USDA FoodData Central. (n.d.). Coffee, brewed, prepared with tap water, black. FDC ID: 2091869. Retrieved from https://fdc.nal.usda.gov/fdc-app.html#/food-details/2091869/nutrients (Access date: [Insert Current Date])
- Harvard T.H. Chan School of Public Health. (n.d.). The Nutrition Source: Coffee. Retrieved from https://www.hsph.harvard.edu/nutritionsource/food-features/coffee/ (Access date: [Insert Current Date])
- Higdon, J. V., & Frei, B. (2006). Coffee and health: a review of recent human research. Critical Reviews in Food Science and Nutrition, 46(2), 101-123.
- Messina, M., & Messina, V. (2018). The role of plant-based foods in the treatment and prevention of type 2 diabetes. Journal of the Academy of Nutrition and Dietetics, 118(10), 1958-1971. (General nutritional consensus for plant-based foods, supports coffee's role as a low-GI beverage).
Field Notes: Dr. Aria Vance
Subject: Coffee
Focus: Volumetric expansion/contraction, historical context, tracking challenges.
Why Coffee Is Difficult to Track
Dr. Aria Vance, Lead Nutrition Data Scientist, NutriSnap
Coffee. Ah, coffee. The very lifeblood of modern society, the dark elixir fueling every deadline, every early morning, every late-night brainstorm. But for all its ubiquity, all its perceived simplicity, trying to track it in any meaningful, accurate way has been, frankly, a total nightmare. A real headache.
It started in Ethiopia, legend says, with dancing goats and a curious monk. From ancient Sufi monasteries, it spread like wildfire across the Ottoman Empire, brewing intrigue and philosophical discourse in bustling coffee houses. Europe, initially suspicious, succumbed. Soon, coffee became the ultimate social lubricant, the spark for revolutions and Enlightenment ideas, an absolute cultural bedrock. Entire economies rose and fell on these roasted beans. Its cultural weight is immense; its historical footprint, colossal.
Yet, despite this grand narrative, the sheer, maddening variability of coffee makes precise nutritional tracking a Sisyphean task. Consider the sheer spectrum of coffee experiences. You have your meticulously measured single-origin pour-over. Then there's the diner coffee, bottomless, tasting faintly of betrayal and desperation. And the espresso shot, intense, concentrated. These are worlds apart. Even a "standard" cup is an illusion. What's a "cup"? My grandmother's floral monstrosity holds twice what a demitasse does. Barcodes? Useless for homemade brews. Scales? Who weighs their water and their coffee grounds every single morning? Nobody. Absolutely nobody, except perhaps a few extremely dedicated baristas, bless their hearts.
And the additions! Oh, the additions. A splash of milk? Is it whole, skim, oat, almond? Each dramatically shifts the caloric landscape. A teaspoon of sugar? More like a mountain for some. Syrups, creams, whipped toppings – each a caloric bomb, turning what started as a near-zero calorie beverage into a dessert masquerading as a morning pick-me-up. Manually logging this requires an obsessive level of detail, a kind of forensic mental calculus that most people simply don't have the time or patience for. It's a cognitive burden. It's tedious. It's prone to massive errors. People forget. They estimate. They lie to themselves.
The whole process is fundamentally flawed. We needed something... more. Something that could see the subtle nuances. Recognize the difference between a latte and a flat white, estimate the frothy peak of a cappuccino, discern the milky swirl, the dark depth of the brew. To understand what a "splash" really means for macro intake. That's why NutriSnap was born. Its AI doesn't just see a "coffee"; it forensically analyzes the visual evidence. The volume. The color gradient. The toppings. Finally, a solution for the caffeinated chaos. We're getting closer to true accuracy, one perfectly analyzed cup at a time.
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