Oolong Semi-Fermented Chinese Tea
The jewel of Fujian province and its famous Tieguanyin: a tea that sits in a charming middle ground between fresh green tea and deep black tea, carefully partly oxidised for a complex floral, fruity taste and a boost to metabolism.
Glycemic index
Glycemic load
Calories
Protein
💡 Smart Nutritional Guidance
Consumption advice
Drink a warm cup 30 minutes after a heavy meal; in Chinese tradition it is famous as the leading “grease cutter” and digestive aid.
Best preparation methods
Steep it in water at 90 °C; amazingly, the rolled oolong leaves can be re-steeped 3 or 4 times, each time releasing a new layer of flavour.
Important Nutritional Note
It contains no starch or sugar, so the glycemic index does not apply; it contains special polymerised polyphenols that may inhibit fat-digesting lipase and so reduce the absorption of some dietary fat.
Nutrition facts
| Nutrient | Per 100 g | Per typical portion (250 g) |
|---|---|---|
| Calories | 1 kcal | 2.5 kcal |
| Protein | 0.1 g | 0.2 g |
| Carbohydrate | 0.2 g | 0.5 g |
| Available carbohydrate | 0.2 g | 0.5 g |
| Fat | 0 g | 0 g |
| Dietary fibre | 0 g | 0 g |
The typical portion is approximate, for comparison purposes.
Comparison & smarter alternatives
It has 1 kcal per 100 g, ranking 5 of 29 in Drinks (lowest first).
Related foods from the same family:
Frequently asked questions
Does oolong tea help burn body fat?
Small studies have shown that drinking oolong regularly may raise daily calorie burning by 3–4% and reduce the absorption of some dietary fat.
How much caffeine is in oolong tea?
It contains a moderate amount of caffeine (less than coffee and black tea, slightly more than green tea), giving balanced alertness without palpitations.
What is the nutritional value of a 250 ml cup?
No fat, no starch and under 3 kcal.
Reviewed by the WiBo Health medical team · Last reviewed 13 October 2026
Disclaimer: This guidance is for nutritional lifestyle orientation and does not constitute a diagnostic medical device under EU Regulation MDR 2017/745.