I used to think herbal tea was just flavored hot water. Then I had a stomachache at a friend’s house and she handed me a cup of peppermint tea. Twenty minutes later my stomach felt completely fine. I was suspicious. I started reading.

Herbal teas are not medicine — I want to be clear about that — but many of them contain compounds with measurable physical effects. Here is what the research actually supports.

Peppermint — Stomach and Headaches

Peppermint contains menthol, which relaxes the smooth muscles of the digestive tract. This is why it helps with bloating, gas, and indigestion. Multiple studies have found peppermint oil capsules effective for IBS symptoms, and the tea has a milder version of the same effect.

For tension headaches, the menthol in peppermint tea acts as a mild muscle relaxant and the steam itself can open sinus passages. It is not as strong as a pain reliever, but it helps alongside one.

Ginger — Nausea and Inflammation

Ginger has the strongest research backing of any herbal tea. It is consistently effective against nausea — morning sickness, motion sickness, post-surgery nausea. The active compounds, called gingerols, work on the digestive tract and possibly the central nervous system.

Fresh ginger tea is better than bagged. Slice a 1-inch piece of fresh ginger root, simmer in water for 10 minutes, strain. Add honey if the spice is too much. Bagged ginger tea is milder but still helpful.

Chamomile — Sleep and Anxiety

Chamomile contains apigenin, an antioxidant that binds to the same brain receptors as benzodiazepines — albeit much, much more weakly. It is not a sedative, but it promotes relaxation. A 2016 study found chamomile extract significantly reduced moderate-to-severe anxiety symptoms over eight weeks.

For sleep, drink it 30-45 minutes before bed. The effect is subtle — you will not feel knocked out — but people who drink chamomile regularly report falling asleep faster.

A Quick Reference

• Upset stomach: Peppermint or ginger
• Can’t sleep: Chamomile or lemon balm
• Sore throat: Licorice root or slippery elm
• Stressed: Lemon balm or passionflower
• Congested: Eucalyptus or thyme

None of these replace a doctor. But I now keep peppermint, ginger, and chamomile in the cabinet. They cost a few dollars each and when my stomach acts up or I cannot wind down, a cup of the right tea usually helps.