What Exactly Is Guayusa? Health Benefits + How To Add It To Your Diet

You're probably familiar with beverages like green tea and yerba mate, which offer both a caffeine dose and bonus benefits. But what about guayusa tea?

Guayusa is a type of holly tree native to the Amazon rainforest. "Guayusa is typically grown on a small family farm and is hand-picked," says plant-based registered dietitian Amy Gorin, M.S., RDN. "The leaves of this tree are caffeinated." And even though guayusa may be a new and upcoming ingredient in the States, the use of guayusa leaves is no new discovery.

Historically, guayusa was most commonly consumed as a tea. "The leaves are picked, dried, and brewed to make an herbal tea that is often used as a coffee alternative," Nieves says. Today, you may find it as an ingredient in some natural energy drinks or sold as a caffeinated tea (such as Runa). It's also available to purchase in powder form.

Gorin says that Indigenous families in Ecuador would often wake up as early as 3 a.m. to sit around a fire and drink guayusa tea from gourds until the sunrise.

In addition to a boost in energy and alertness—thanks to caffeine content that's comparable to coffee—Gorin says that guayusa also contains theobromine, an alkaloid that may be linked to enhancing your mood1.

The most-researched benefit of guayusa, however, is its rich antioxidant levels. Studies indicate the plant is high in antioxidants, anti-inflammatory, and antibacterial activity. One research review also found that guayusa, among other benefits, may be rich in polyphenols, which are powerful brain-protective antioxidants.

"From what we know about guayusa so far, it appears to present no greater risk to health than other commonly used teas like green or yerba mate," says Nieves. "However, since guayusa does contain caffeine, it's important not to overdo it with caffeinated beverages." Excess amounts of caffeine may cause symptoms like nervousness, insomnia, and anxiety, Nieves says. 

Guayusa is becoming more popular stateside and can be a good option for a boost in energy and alertness, but it's important to drink the caffeinated beverage in moderation.

It's easy to brew your own guayusa tea at home, and, thanks to its high antioxidant levels, it may even help reduce your risk for some diseases.