Butterfly pea tea is a plant-based drink made from the flowers of the butterfly pea plant, native to Southeast Asia
Butterfly pea tea comes from steeping dried flowers of Clitoria ternatea, a flowering plant grown across Thailand, Vietnam, and other tropical regions. The drink has a mild, slightly earthy taste — not bitter — and brews to a striking deep blue color that shifts to purple or pink when you add acidic ingredients like lemon juice or vinegar. People drink it hot or cold, sometimes sweetened, sometimes blended into other beverages.
The tea contains natural compounds called anthocyanins, the same pigments that give blueberries and purple cabbage their color. These compounds are what draw most people to butterfly pea tea: they're associated with antioxidant activity in the body, though the research on what that means for human health is still developing. The drink itself contains no caffeine, no calories when unsweetened, and no added ingredients unless you choose to add them.
Key Takeaways
- Butterfly pea flowers brew into a naturally blue tea with a mild flavor and no caffeine.
- The tea contains anthocyanins, plant compounds studied for antioxidant properties, though human health benefits are not yet proven.
- You can buy dried butterfly pea flowers loose or in tea bags from specialty tea retailers, online sellers, and some health food stores.
- The color change when you add lemon or lime is a real chemical reaction, not a trick, and happens because the pH shift changes how anthocyanins reflect light.
What anthocyanins are and what research shows so far
Anthocyanins are water-soluble pigments made by plants. In test tubes and animal studies, they show antioxidant and anti-inflammatory activity — meaning they can neutralize unstable molecules called free radicals and reduce certain inflammatory markers. This is why they appear in a lot of functional food marketing.
The gap between test-tube results and human outcomes is large. A small number of human studies on butterfly pea tea itself exist, mostly conducted in Southeast Asia, and they suggest potential benefits for memory, eye health, and blood sugar control. None of these studies are large enough to be definitive, and most were funded by organizations with a financial interest in the product. What we can say honestly is that butterfly pea tea is unlikely to harm you, but whether it prevents disease or reverses existing conditions is not yet established by rigorous human research.
How to brew butterfly pea tea and what to expect
Dried butterfly pea flowers are sold loose or in biodegradable tea bags. To brew, steep one teaspoon of loose flowers (or one tea bag) in eight ounces of hot water for five to ten minutes. The longer you steep, the deeper the blue color and the stronger the flavor. The taste is subtle — some describe it as grassy or slightly floral, others say it's nearly neutral. It does not taste medicinal or bitter.
The color shift is the most striking part of the experience. Add a squeeze of fresh lemon juice or lime, and the tea will turn purple, pink, or even reddish depending on how much acid you add. This happens because anthocyanins change color in response to pH. You can add honey, agave, or other sweeteners if you prefer it sweet, or drink it plain. Some people blend it into smoothies, mix it into cocktails, or use it as a base for iced tea.
Where to buy butterfly pea flowers and what to look for
Dried butterfly pea flowers are available from specialty tea retailers (online and in-store), general online marketplaces, and some health food stores. Prices vary widely — expect to pay anywhere from a few dollars to fifteen dollars per ounce depending on the seller and whether you buy loose flowers or tea bags. Loose flowers are usually cheaper per serving and produce less packaging waste.
Look for flowers that are whole and brightly colored rather than faded or broken into dust. The package should list the country of origin (usually Thailand or Vietnam) and ideally note whether the flowers were grown organically or conventionally. If you have allergies to plants in the legume family (peas, beans, peanuts), check with a healthcare provider before trying butterfly pea tea, since the plant is botanically related to that family.
How butterfly pea tea fits into a functional foods approach
Butterfly pea tea is one of many plant-based drinks marketed for their antioxidant content. Unlike some functional foods that make specific health claims, butterfly pea tea is usually presented as a way to add plant compounds to your diet in a form that's straightforward and enjoyable. The appeal is partly practical — it's a zero-calorie, caffeine-free beverage — and partly about the experience: the color change and the ritual of brewing.
If you're interested in anthocyanins, you'll also find them in blueberries, blackberries, purple grapes, red cabbage, and tart cherry juice. Butterfly pea tea is not a replacement for eating whole fruits and vegetables, but it can be one part of a diet that includes a variety of plant foods. The real benefit of any functional food is consistency: drinking butterfly pea tea once a month will not change your health, but including it as a regular part of a diet rich in whole foods may contribute to overall wellness over time.
Storage and shelf life
Dried butterfly pea flowers keep well in a cool, dry place away from direct sunlight. Store them in an airtight container — a glass jar with a tight lid works well — and they will remain fresh for six months to a year. Over time, the color may fade slightly and the flavor may become less pronounced, but the flowers do not spoil quickly the way fresh flowers do.
Once you brew the tea, drink it within a few hours if you leave it at room temperature, or refrigerate it for up to three days. Iced butterfly pea tea is popular in Southeast Asia and tastes good cold, so making a batch to refrigerate is a practical way to use the flowers.
Cost comparison with other functional teas
Butterfly pea tea is competitively priced compared to other specialty teas marketed for their plant compounds. A single serving typically costs between 25 cents and 75 cents, depending on where you buy the flowers and how much you use per cup. Green tea and hibiscus are often slightly cheaper per serving, while turmeric-based drinks tend to cost more.
| Tea Type | Typical Price Per Serving | Caffeine | Main Compounds |
|---|---|---|---|
| Butterfly pea | $0.25–$0.75 | None | Anthocyanins |
| Green tea | $0.15–$0.50 | 25–50 mg | Catechins, caffeine |
| Hibiscus | $0.20–$0.60 | None | Anthocyanins, organic acids |
| Turmeric (golden milk) | $0.50–$1.50 | None | Curcumin |
The choice between them often comes down to taste preference and whether you want caffeine. Butterfly pea tea stands out for its visual appeal and the color-changing effect, which makes it popular for both everyday drinking and special occasions.
Frequently Asked Questions
Is butterfly pea tea safe to drink every day?
Yes, for most people. It contains no caffeine and no known toxins. If you are pregnant, nursing, or taking blood thinners, check with your healthcare provider first, since some research suggests anthocyanins may have mild blood-thinning effects. People with legume allergies should also consult a provider.
Why does the color change when I add lemon?
Anthocyanins are pH-sensitive pigments. Lemon juice is acidic, and the acid causes the anthocyanins to reflect light differently, shifting the color from blue to purple or pink. This is a real chemical change, not a visual trick, and it happens every time you add acid to the tea.
Does butterfly pea tea actually improve memory or eyesight?
Small studies suggest it may help, but the evidence is not strong enough to claim it as a proven benefit. The research exists mostly in Southeast Asia and is often funded by sellers of the product. Drinking it as part of a healthy diet is reasonable, but do not rely on it as a treatment for memory loss or vision problems.
Can I mix butterfly pea tea with other teas or drinks?
Yes. It blends well with green tea, jasmine tea, or other mild-flavored teas. You can also add it to smoothies, cocktails, or lemonade. The color shift makes it visually interesting in mixed drinks, which is why it's popular in bars and cafes.
What's the difference between butterfly pea tea and other blue-colored drinks?
Butterfly pea tea is naturally blue from anthocyanins. Many commercial blue drinks use synthetic food dyes instead. If you want the natural color and the plant compounds, buy dried butterfly pea flowers and brew them yourself. Pre-made bottled versions may contain added sugars or other ingredients.