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Black Tea (Unsweetened) Calories
Antioxidant source, calorie-free, unsweetened
CALORIES
GI
POTASSIUM
FIBER
Black Tea (Unsweetened) Nutrition Facts
Selected: 100 g
1
KCAL / 100G
Carbs
0.2g
· 67%
Protein
0.1g
· 33%
Fat
0g
· 0%
Fiber
0g
Black Tea (Unsweetened) Vitamins & Minerals
Vitamins
B2
0.03mg · 2% DV
B1
0.01mg · 1% DV
B3
0.1mg · 1% DV
B6
0.01mg · 1% DV
Minerals
Potassium ⭐
18mg · 1% DV
Calcium
3mg · 0% DV
Iron
0mg · 0% DV
Magnesium
1mg · 0% DV
Black Tea (Unsweetened) Glycemic Index
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
Is Black Tea (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 Tea (Unsweetened) Contain Allergens?
No known major allergens
Which Diets Is Black Tea (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 Tea (Unsweetened) Fat Profile
SATURATED
0g
MONOUNSATURATED
0g
POLYUNSATURATED
0g
Foods Similar to Black Tea (Unsweetened)
Black Tea (Unsweetened) — Frequently Asked Questions
Can unsweetened black tea be drunk on an empty stomach?
Many people tolerate it well, but it can cause stomach discomfort or acidity in some individuals. If you have a sensitive stomach, it may be easier to drink it with food or after a meal.
Does unsweetened black tea dehydrate you?
In normal amounts, black tea generally contributes to fluid intake rather than causing dehydration. It should not fully replace plain water throughout the day, though.
Can the caffeine in black tea affect sleep?
Yes, especially if you drink it later in the day. People who are sensitive to caffeine may sleep better if they keep black tea to the morning or early afternoon.
Does black tea reduce iron absorption?
Yes, the tannins in black tea can reduce the absorption of non-heme iron from plant foods. People with low iron status may prefer to drink it between meals instead of with iron-rich meals.
Why does black tea sometimes taste bitter or overly astringent?
This usually happens when it is steeped too long, made too strong, or brewed with overly hot water. Shorter steeping and a gentler brew often produce a smoother cup.
How long does brewed unsweetened black tea stay fresh?
It tastes best when freshly made. If you need to keep it, refrigerate it and drink it within a short time for better flavor and food safety.
Can unsweetened black tea be served cold?
Yes, it can be chilled and served as iced tea without changing its basic nature. Just note that added syrups, sugar, or creamy mixers can significantly change the nutrition profile.
Is unsweetened black tea a good pre-workout drink?
For some people, the caffeine can help with alertness and perceived energy before exercise. It is not ideal for everyone, especially if it causes jitters or stomach upset.
Is black tea gentler than coffee?
Many people find black tea milder in taste and effect, but that depends on how each drink is prepared. Someone who feels overstimulated by coffee may tolerate black tea better.
Is it a problem to drink a lot of unsweetened black tea every day?
Very high intake can increase caffeine exposure and may cause restlessness, palpitations, or stomach irritation in some people. Frequent tea drinking with meals may also be less ideal for iron absorption.
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Nutrition data compiled from USDA FoodData Central and scientific sources.