Astringency vs Bitterness in Tea: Understanding the Key Differences
If you've ever taken a sip of tea and felt your mouth go dry and puckered, or tasted a sharp bitterness that lingered, you've met the two sensations people mix up most in tea: astringency and bitterness. The difference is subtle, but once you can tell them apart, you can adjust how you brew and get a smoother cup.
What is astringency?
Astringency isn't a flavour at all; it's a feeling. It's the dry, tightening sensation in your mouth that people often mistake for bitterness. Tannins cause it, and they're found in teas like green tea, white tea, and Dan Cong oolong.
If you've bitten into unripe fruit, sipped red wine, or eaten dark chocolate, you've felt astringency. In tea it adds depth and structure and makes the flavour feel more complex. Aged teas like Liu Bao, and well-made puerh, can have a balanced astringency that changes over time.
What is bitterness?
Bitterness, unlike astringency, is a taste. It's strong and sharp and can be overwhelming: think over-steeped black tea, strong coffee, or raw kale. In tea it comes from caffeine and polyphenols, and it shows up most when you brew too hot or too long.
A little bitterness can add complexity, but too much ruins the flavour and aroma of the cup. Lower-quality tea, especially broken leaf, tends to release more bitter compounds, which is one reason good tea makes a difference.
Bitterness vs. astringency: key differences
| Feature | Astringency | Bitterness |
|---|---|---|
| Sensation or taste? | A dry, puckering sensation | A strong, sharp taste |
| Main cause | Tannins | Caffeine, polyphenols |
| Common in | Green tea, white tea, and Darjeeling | Over-steeped or lower-quality teas |
| Adds | Complexity of flavour | Strength and intensity |
What affects astringency and bitterness?
The style of tea matters first. Some teas lean astringent by nature, like green teas, Dan Cong oolong, and Japanese teas, while others, like puerh and aged teas, develop smoother, deeper flavours.
Steeping time is next: the longer you steep, the more you extract, and over-steeping brings out bitterness, especially in black tea. Temperature works the same way. Hot water releases more tannins and caffeine, which is why tea drinkers brew green and white teas cooler for a smoother taste.
Quality matters too. Whole loose leaf tea releases its flavour more gradually than broken leaf, so it turns bitter less easily.
How to reduce astringency and bitterness
If your tea tastes too sharp or drying, try these changes:
- Brew green teas at 175°F (80°C) so they don't turn too astringent.
- Steep for less time, especially delicate teas like Japanese teas or white tea.
- Choose good whole-leaf tea. Better leaf makes a better cup.
- Try a different brewing style. Gong fu cha, with a small pot and tea tray, uses several short infusions so you control how much flavour comes out.
- Cold brew it. Cold water pulls out fewer tannins, so the tea comes out smoother and more refreshing.
- Add a little honey or milk to black tea to balance any bitterness.
In short
Astringency is a dry feeling in your mouth; bitterness is a sharp, intense taste. Once you know which one you're tasting, you can fix it with the right brewing method, whether that's gong fu, cold brew, or ordinary steeping.
The same applies whatever you drink, from Japanese teas to Nepali tea to a fine Dan Cong oolong.
Ready to try tea with no bitterness?
Every tea we sell is grown at 5,000 to 7,000 ft in the Himalayan highlands of Ilam and Taplejung, Nepal, where the altitude, the cool weather, and the slow growth produce leaves with no bitterness at all, not just less of it.
Start with our Tea Sampler Kit: 10 loose leaf teas covering every style we grow, for $30 CAD. If your tea has ever tasted bitter, compare it with these.
Try the Tea Sampler Kit, $30
