Herbal teas span a huge range of dried flowers, roots, leaves, spices, and berries, each brewed for a different reason. Unlike black, green, or oolong tea, which all come from the same plant (Camellia sinensis), herbal teas contain no actual tea leaves. They’re technically called tisanes, and virtually any edible plant steeped in hot water counts as one. Here are the most popular options, what they’re good for, and how to get the most out of them.
Chamomile: The Classic Sleep Tea
Chamomile is the go-to for winding down before bed. The active compound in chamomile, apigenin, binds to receptors in the brain that promote calm and drowsiness. In animal studies, it lowers stress hormone levels and raises serotonin, a chemical messenger involved in sleep regulation. The sedative reputation is well earned, though the research in humans is more modest: a study of people with insomnia found that 540 mg of chamomile extract improved daytime function only slightly, while higher doses (1,100 to 1,500 mg of extract) showed clearer benefits for anxiety and depression symptoms.
A single cup of chamomile tea contains far less apigenin than a concentrated supplement, so think of it as a gentle nudge toward relaxation rather than a knockout remedy. It pairs well with a consistent bedtime routine.
Peppermint and Ginger: Digestive Staples
If your stomach feels off, these two are the most reliable herbal options. Peppermint tea relaxes the smooth muscles of the digestive tract, which can ease bloating, gas, and that uncomfortable “too full” feeling after eating. It’s one of the most widely used herbal medicines during pregnancy for nausea and wind, and studies confirm it’s safe in moderate amounts for both parent and baby.
Ginger works differently. A natural component in ginger root called gingerol speeds up the rate at which food leaves the stomach and moves through the digestive system. That faster emptying relieves nausea, cuts down on fermentation in the gut, and reduces bloating and gas. Ginger tea is also considered safe during pregnancy in moderate amounts, which is good news since morning sickness is one of the most common reasons people reach for it.
Hibiscus: A Tart Tea for Blood Pressure
Hibiscus tea has a bright, cranberry-like tartness and one of the strongest evidence bases of any herbal tea. A USDA-funded study found that drinking hibiscus tea daily lowered systolic blood pressure (the top number) by 7.2 points compared to a placebo. People who started with higher blood pressure saw even bigger drops: 13.2 points systolic and 6.4 points diastolic. Those are meaningful reductions, comparable to what some first-line blood pressure medications achieve at low doses.
It’s typically served iced in many cultures (known as agua de Jamaica in Mexico, bissap in West Africa, and karkade in Egypt), but it brews well hot too. The flavor is strong enough to stand on its own without sweetener, though a little honey rounds it out.
Echinacea and Elderberry: Cold Season Teas
These two are the most popular immune-support herbs, and both have clinical data behind them. A review of 14 studies found that echinacea may lower the risk of catching a cold by more than 50% and shorten the duration of colds by about a day and a half. It’s most effective when you start drinking it at the first sign of symptoms rather than waiting until you’re fully sick.
Elderberry works a bit differently. Rather than preventing infection, it appears to reduce how long a virus sticks around and how severe it gets. One study of 60 people with influenza found that those taking elderberry showed symptom improvement in two to four days, while the placebo group took seven to eight days. Elderberry targets the virus directly and reduces inflammation in the airways, which is why it tends to help most with respiratory symptoms like congestion and coughing. You’ll find elderberry in tea blends, syrups, and lozenges. The tea form is milder than a concentrated syrup but still worth brewing during cold and flu season.
Rooibos, Lemon Balm, and Other Options
Beyond the big names, several other herbal teas are worth knowing about:
- Rooibos comes from a South African shrub and has a naturally sweet, slightly nutty flavor. It’s caffeine-free and rich in antioxidants, making it a popular everyday replacement for black tea.
- Lemon balm belongs to the mint family and has a light citrus flavor. It’s traditionally used for anxiety and restlessness, and it blends well with chamomile for a stronger calming effect.
- Raspberry leaf tea has an earthy, mildly tannic taste similar to black tea. It’s commonly recommended in the third trimester of pregnancy and is considered safe throughout pregnancy and breastfeeding.
- Dandelion root tea has a roasted, coffee-like flavor and is often used as a caffeine-free coffee substitute. It has a mild diuretic effect.
- Turmeric tea contains curcumin, a compound with anti-inflammatory properties. Pairing it with a pinch of black pepper increases absorption significantly.
How to Brew for Best Results
Herbal teas are more forgiving than green or white tea, which turn bitter if the water is too hot. For nearly all herbal teas, use fully boiling water (212°F / 100°C) and steep for a full five minutes. That hotter temperature and longer steep time are necessary because you’re extracting flavor and beneficial compounds from tougher plant material like roots, bark, and dried flowers rather than delicate tea leaves.
For fresh herbs like mint or ginger, you can go even longer, up to 10 minutes, without any bitterness. Covering your mug while it steeps traps the steam and volatile oils that would otherwise evaporate, which makes a noticeable difference in both flavor and aroma. If you’re using a root like ginger or turmeric, slice it thinly or grate it to expose more surface area.
Interactions Worth Knowing About
Herbal teas are gentle, but they aren’t pharmacologically inert. A few interactions are well documented enough to be aware of. Chamomile can amplify the effect of sedative medications and may interact with blood thinners like warfarin. St. John’s wort, sometimes brewed as tea for mood support, has significant interactions with a wide range of medications including blood thinners, oral contraceptives, and certain antidepressants. Ginkgo biloba tea also increases bleeding risk when combined with anticoagulants.
Goldenseal is a less obvious one: it can reduce blood levels of the common diabetes medication metformin by about 25%, enough to meaningfully affect blood sugar control. Even green tea, while not technically an herbal tea, can interfere with certain blood pressure and cholesterol medications at high doses.
During pregnancy, ginger, peppermint, and raspberry leaf are the best-studied safe options. Chamomile has some evidence suggesting it could stimulate uterine contractions in large amounts, so moderation matters. For dandelion and rosehip tea, there simply isn’t enough safety data to make a clear call either way. If you’re on medication or pregnant, it’s worth checking whether your specific herbal tea has a known interaction before making it a daily habit.