(Data for this article drawn from GoodRx)
Beet juice contains nitrate, which can improve blood flow in the body. A clinical trial showed that when someone drank a little more than 2 cups of beet juice once a day, their blood pressure decreased. The drop can happen as soon as 30 minutes after drinking beet juice and lasts almost 24 hours. This effect may be more pronounced in people who are 45 years of age or older. Beet juice has also been found to improve cardiorespiratory endurance and performance in athletes.
Celery contains a phytochemical called phthalides. As an extract, it’s called NBP, and it relaxes the tissues of the artery walls to increase blood flow and reduce blood pressure.
Hibiscus tea contains the antioxidant anthocyanin. Research shows that 2 cups of hibiscus tea every day for at least 2 weeks can help decrease blood pressure. Most studies examine the effects after 4 weeks. Some research suggests it can take effect in 1.5 hours, while others saw no effect up to 4 hours after drinking it. This might be due to the variation in the amount of anthocyanins in each cup.
Like hibiscus, pomegranate juice also contains anthocyanins.
One study showed that men who drank about ¼ cup or more of pomegranate juice daily for 2 weeks lowered their blood pressure.