Beverages, coffee, brewed, prepared with tap water
Whole food · Beverages
Photo: Wikipedia
This is the quintessential black coffee, brewed simply with tap water. It's a nearly calorie-free, aromatic beverage with a robust, slightly bitter flavor and a clean, thin texture. Nutritionally, it's a powerhouse of antioxidants but provides negligible macronutrients.
Calorie split: 73% protein · 0% carbs · 27% fat
↓ Full nutrition💚 Why it's loved
People love it for its bold, customizable flavor that can range from bright and acidic to deep and smoky, and its role as a comforting daily ritual or social catalyst across cultures.
⚠️ Watch-outs & how to enjoy it better
The caffeine can cause jitters, anxiety, or disrupt sleep in sensitive individuals; its acidity may aggravate heartburn or acid reflux. To mitigate, consume with food, opt for low-acid roasts, or switch to decaf later in the day. It can also stain teeth; rinsing with water afterward helps.
Key benefits
- Rich in antioxidants like chlorogenic acid
- May enhance alertness and cognitive function
- Contains negligible calories, sugar, and fat
- A source of essential minerals like potassium and magnesium
- Associated with improved metabolic health in studies
🍽️ Popular dishes
🌍 Where it's eaten
💡 Did you know?
The world's most expensive coffee, Kopi Luwak, is made from beans that have been eaten and excreted by the Asian palm civet.
Full nutrition (USDA data · scales with serving)
| Water | 99.4 g |
| Energy | 1.0 kcal |
| Energy | 2.0 kj |
| Protein | 0.12 g |
| Total lipid (fat) | 0.02 g |
| Ash | 0.35 g |
| Carbohydrate, by difference | 0.00 g |
| Fiber, total dietary | 0.00 g |
| Total Sugars | 0.00 g |
| Sucrose | 0.00 g |
| Glucose | 0.00 g |
| Fructose | 0.00 g |
| Lactose | 0.00 g |
| Maltose | 0.00 g |
| Galactose | 0.00 g |
| Calcium, Ca | 2.0 mg |
| Iron, Fe | 0.01 mg |
| Magnesium, Mg | 3.0 mg |
| Phosphorus, P | 3.0 mg |
| Potassium, K | 49.0 mg |
| Sodium, Na | 2.0 mg |
| Zinc, Zn | 0.02 mg |
| Copper, Cu | 0.00 mg |
| Manganese, Mn | 0.02 mg |
| Selenium, Se | 0.00 ug |
| Fluoride, F | 90.7 ug |
| Vitamin C, total ascorbic acid | 0.00 mg |
| Thiamin | 0.01 mg |
| Riboflavin | 0.08 mg |
| Niacin | 0.19 mg |
| Pantothenic acid | 0.25 mg |
| Vitamin B-6 | 0.00 mg |
| Folate, total | 2.0 ug |
| Folic acid | 0.00 ug |
| Folate, food | 2.0 ug |
| Folate, DFE | 2.0 ug |
| Choline, total | 2.6 mg |
| Vitamin B-12 | 0.00 ug |
| Vitamin B-12, added | 0.00 ug |
| Vitamin A, RAE | 0.00 ug |
| Retinol | 0.00 ug |
| Carotene, beta | 0.00 ug |
| Carotene, alpha | 0.00 ug |
| Cryptoxanthin, beta | 0.00 ug |
| Vitamin A, IU | 0.00 iu |
| Lycopene | 0.00 ug |
| Lutein + zeaxanthin | 0.00 ug |
| Vitamin E (alpha-tocopherol) | 0.01 mg |
| Vitamin E, added | 0.00 mg |
| Tocopherol, beta | 0.00 mg |
| Tocopherol, gamma | 0.01 mg |
| Tocopherol, delta | 0.00 mg |
| Tocotrienol, alpha | 0.02 mg |
| Tocotrienol, beta | 0.00 mg |
| Tocotrienol, gamma | 0.00 mg |
| Tocotrienol, delta | 0.00 mg |
| Vitamin D (D2 + D3), International Units | 0.00 iu |
| Vitamin D (D2 + D3) | 0.00 ug |
| Vitamin K (phylloquinone) | 0.10 ug |
| Alcohol, ethyl | 0.00 g |
| Caffeine | 40.0 mg |
| Theobromine | 0.00 mg |
Fat & fatty acid profile (per 100g)
| Fatty acids, total saturated | 0.00 g |
| SFA 4:0 | 0.00 g |
| SFA 6:0 | 0.00 g |
| SFA 8:0 | 0.00 g |
| SFA 10:0 | 0.00 g |
| SFA 12:0 | 0.00 g |
| SFA 13:0 | 0.00 g |
| SFA 14:0 | 0.00 g |
| SFA 15:0 | 0.00 g |
| SFA 16:0 | 0.00 g |
| SFA 17:0 | 0.00 g |
| SFA 18:0 | 0.00 g |
| SFA 20:0 | 0.00 g |
| SFA 22:0 | 0.00 g |
| SFA 24:0 | 0.00 g |
| Fatty acids, total monounsaturated | 0.01 g |
| MUFA 14:1 | 0.00 g |
| MUFA 15:1 | 0.00 g |
| MUFA 16:1 | 0.00 g |
| MUFA 17:1 | 0.00 g |
| MUFA 18:1 | 0.00 g |
| MUFA 18:1 c | 0.01 g |
| MUFA 20:1 | 0.00 g |
| MUFA 22:1 | 0.00 g |
| Fatty acids, total polyunsaturated | 0.00 g |
| PUFA 18:2 | 0.00 g |
| PUFA 18:3 | 0.00 g |
| PUFA 18:3 n-3 c,c,c (ALA) | 0.00 g |
| PUFA 18:3 n-6 c,c,c | 0.00 g |
| PUFA 18:4 | 0.00 g |
| PUFA 20:2 n-6 c,c | 0.00 g |
| PUFA 20:3 | 0.00 g |
| PUFA 20:4 | 0.00 g |
| PUFA 20:5 n-3 (EPA) | 0.00 g |
| PUFA 22:5 n-3 (DPA) | 0.00 g |
| PUFA 22:6 n-3 (DHA) | 0.00 g |
| Fatty acids, total trans | 0.00 g |
| Fatty acids, total trans-monoenoic | 0.00 g |
| TFA 18:1 t | 0.00 g |
| Cholesterol | 0.00 mg |
Amino acid profile (per 100g)
| Tryptophan | 0.00 g |
| Threonine | 0.00 g |
| Isoleucine | 0.00 g |
| Leucine | 0.01 g |
| Lysine | 0.00 g |
| Methionine | 0.00 g |
| Cystine | 0.00 g |
| Phenylalanine | 0.00 g |
| Tyrosine | 0.00 g |
| Valine | 0.00 g |
| Arginine | 0.00 g |
| Histidine | 0.00 g |
| Alanine | 0.00 g |
| Aspartic acid | 0.01 g |
| Glutamic acid | 0.02 g |
| Glycine | 0.00 g |
| Proline | 0.00 g |
| Serine | 0.00 g |
FAQ
Is brewed coffee hydrating or dehydrating?
While caffeine is a mild diuretic, the water content in a standard cup of coffee more than compensates. Moderate consumption contributes to your daily fluid intake and is not dehydrating.
How does tap water affect coffee taste?
Tap water's mineral content and chlorine levels can significantly alter flavor. Hard water can make coffee taste flat or chalky, while chlorine can add a medicinal note. Using filtered water is often recommended for the purest taste.
Why is black coffee almost calorie-free?
Coffee beans themselves contain very few digestible calories. The brewing process extracts flavor compounds and antioxidants, but not significant amounts of fat, protein, or carbohydrates, especially without added milk or sugar.
Nutrient density (calculated · NRF9.3)
Nutrient Rich Foods index: beneficial nutrients (protein, fiber, vitamins, minerals) minus saturated fat, added sugar & sodium, per 100 kcal.
NRF9.3 index — Fulgoni, Keast & Drewnowski, 2009. Computed from USDA nutrients.
Weight-loss friendliness (composite index)
Energy density 0.01 kcal/g · 48% calories from protein · 0.0 g fiber · 0.0 g sugar per 100 g.
Composite of energy density (Rolls et al., 1999), protein & fiber satiety, minus sugar. A calculated heuristic — ranks satiety-per-calorie, not a clinical measure.
Dietary load (calculated from USDA values)
Potential renal acid load. Positive = acid-forming, negative = alkaline-forming.
Sodium-to-potassium ratio: 0.04 (lower is better — aim for ≤ 1)
Sodium:potassium per WHO potassium guidance. Computed from USDA nutrients.