Refreshing and floral, hibiscus tea is a popular choice for its flavor. But this herbal favorite also has potential health benefits, with studies suggesting it may help support blood pressure.
To get the most out of hibiscus tea, does it matter when you do your sipping? Experts say certain times of day may be more helpful for blood pressure regulation, but consistent intake matters most.
Drinking hibiscus tea in the morning—ideally between 6 a.m. and 10 a.m.—may be the best time option for blood pressure benefits, said Lisa Andrews, MEd, RD, LD, owner of Sound Bites Nutrition.
It’s normal for blood pressure to be highest first thing in the morning, but levels that surge beyond a healthy range at wake-up time is a strong predictor of future coronary artery disease and stroke. It’s possible that a morning hibiscus could help bring blood pressure down at this crucial time.
That said, according to plant-based dietitian Sheri Gaw, RDN, CDCES, there’s no strong evidence that timing is a critical factor in the tea’s effectiveness. “When you drink hibiscus tea does not seem to matter as much as consistency,” she said.
Andrews noted, however, that some people may need to be mindful of timing if they take diuretics, which are commonly prescribed to treat high blood pressure. “As hibiscus tea has a natural diuretic effect, it should be spaced two hours from the use of diuretics to prevent excess diuresis and dizziness,” she said.
Studies have examined how different amounts of hibiscus tea affect blood pressure, and two to three cups daily appears to be the sweet spot. Andrews pointed to one paper suggesting that two daily cups were associated with blood pressure reductions, while two other studies found meaningful benefits with three cups daily.
Changes in average blood pressure won’t happen overnight, though. “A realistic timeline would be at least four weeks of use,” Andrews said. Gaw agreed, noting that a 2022 review found meaningful blood pressure improvements when participants consumed hibiscus tea for longer than four weeks.
As noted above, hibiscus tea can interfere with certain blood pressure medications. It may also interact adversely with immunosuppressant medications taken after liver or kidney transplants, potentially damaging the transplanted organ. Gaw advised anyone taking prescription drugs to consult their healthcare team before drinking hibiscus tea.
People with chronically low blood pressure should also be cautious, as the tea could cause a dangerous dip in blood pressure.
Women in certain life stages may need to limit or avoid this beverage. “Hibiscus tea contains phytoestrogens, which can interfere with hormonal balance and lead to possible complications for women who are pregnant, trying to get pregnant, or breastfeeding,” Gaw said. A 2023 case report discussed the possible interference with in-vitro fertilization while drinking hibiscus tea regularly, she added.
Finally, it’s important to remember that hibiscus tea is just one factor in supporting healthy blood pressure. “While hibiscus tea may be beneficial, it’s also important for individuals to eat a heart-healthy diet that includes high-potassium fruits and vegetables, dairy products, lean meats, nuts, seeds, and less processed foods,” Andrews said.
