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Black coffee, unsweetened Calories
Very low calorie, unsweetened plain coffee
CALORIES
GI
POTASSIUM
FIBER
Black coffee, unsweetened Nutrition Facts
Selected: 100 g
2
KCAL / 100G
Carbs
0g
· 0%
Protein
0.1g
· 100%
Fat
0g
· 0%
Fiber
0g
Black coffee, unsweetened Vitamins & Minerals
Vitamins
B2
0.08mg · 6% DV
B1
0.01mg · 1% DV
B3
0.19mg · 1% DV
Folate
2µg · 1% DV
Minerals
Magnesium
3mg · 1% DV
Potassium ⭐
49mg · 1% DV
Calcium
2mg · 0% DV
Iron
0mg · 0% DV
Black coffee, unsweetened Glycemic Index
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
Is Black coffee, unsweetened Processed?
NOVA 2
Minimally Processed
1. Unprocessed
2. Minimally Processed
3. Processed
4. Ultra-Processed
NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.
Does Black coffee, unsweetened Contain Allergens?
No known major allergens
Which Diets Is Black coffee, unsweetened Good For?
Vegan
✓ Suitable
Vegetarian
✓ Suitable
Gluten-Free
✓ Suitable
Dairy-Free
— Not suitable
Mediterranean
✓ Suitable
Paleo
✓ Suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
✓ Suitable
Low FODMAP
— Not suitable
Black coffee, unsweetened Fat Profile
SATURATED
0g
MONOUNSATURATED
0g
POLYUNSATURATED
0g
Foods Similar to Black coffee, unsweetened
Black coffee, unsweetened — Frequently Asked Questions
When should unsweetened black coffee be consumed to minimize sleep disruption?
Caffeine sensitivity varies, but stopping coffee at least 6–8 hours before bed may make it easier to fall asleep. In sensitive people, even afternoon coffee can interfere with nighttime sleep.
Can black coffee upset the stomach when consumed on an empty stomach?
For some people, coffee on an empty stomach can trigger heartburn, nausea, stomach discomfort, or more frequent bowel movements. People with reflux or a sensitive stomach may tolerate it better with or after food.
Does filtering coffee make a health difference?
Yes. Unfiltered coffee, such as boiled coffee, French press coffee, and Turkish coffee, contains more diterpenes that can raise LDL cholesterol. Paper filters retain much of these compounds.
Is unsweetened black coffee useful before a workout?
For people accustomed to caffeine, coffee about 30–60 minutes before exercise may support alertness and reduce perceived effort. Choose a smaller amount or another timing if it causes jitters, palpitations, or stomach upset.
Does black coffee cause dehydration?
At usual intake levels, coffee does not generally cause net dehydration, and its fluid content contributes to hydration. Very high caffeine intake can increase urination, so coffee should not replace water altogether.
Does coffee affect iron absorption?
Coffee polyphenols can reduce absorption of non-heme iron from plant foods. People with iron deficiency may benefit from having coffee at least 1–2 hours away from iron-rich meals or iron supplements.
Can unsweetened black coffee raise blood pressure?
Caffeine can cause a temporary increase in blood pressure, particularly in people who do not consume it regularly. Those with uncontrolled hypertension, heart rhythm problems, or caffeine sensitivity should discuss their intake with a healthcare professional.
Is brewed coffee from beans better than instant coffee?
Freshly ground bean coffee usually offers a fuller aroma and contains no added ingredients. Plain instant coffee can also be a practical choice, but flavored mixes and 3-in-1 products often contain sugar and powdered creamers.
How should brewed black coffee be stored?
Coffee tastes best when consumed soon after brewing. Leftover coffee can be kept in a sealed container in the refrigerator for about 1–2 days, though its flavor becomes flatter and more oxidized over time.
Can coffee be addictive?
Regular caffeine use can lead to tolerance and physical dependence. Stopping suddenly may cause temporary symptoms such as headache, fatigue, irritability, and trouble concentrating.
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Nutrition data compiled from USDA FoodData Central and scientific sources.