4 Harmful Supplements To Avoid If You’re At Risk For High Blood Pressure
March 22, 2025 by Faith Geiger
Oftentimes, taking supplements can be a good way to boost your health—especially if there are any essential nutrients lacking from your diet. However, while supplements can be helpful, they can also come with hidden dangers. Staying aware of the potential risks at hand is a crucial part of keeping your health and safety in check.
There are a few supplements that can pose a risk to your heart health and, in particular, your blood pressure. To highlight a few of the most dangerous choices, we checked in with Dr. Kubanych Takyrbashev, MD and health & wellness advisor. He warned against kava, St. John’s Wort, licorice root, and green tea extract. Find all of his expert insight below.
1. Green Tea Extract
Green tea extract often contains caffeine, which can elevate blood pressure in some individuals. Excessive caffeine intake is associated with increased heart rate and blood pressure, which can be particularly problematic for those with hypertension or heart conditions.
"Green tea extract is rich in catechins and antioxidants with potential health benefits. However, in high doses, green tea extract supplements have been associated with liver toxicity and, in some individuals, an increase in blood pressure. The caffeine content in green tea extract can also elevate blood pressure, particularly in those sensitive to caffeine," Takyrbashev says.
2. Licorice Root
Licorice root, used for its potential digestive and anti-inflammatory benefits, leads to sodium retention, and potassium loss caused by glycyrrhizin can result in elevated blood pressure. Prolonged or excessive use of licorice root can exacerbate hypertension.
"Licorice root contains glycyrrhizin, a compound that can cause sodium retention and potassium loss in the body. This imbalance can lead to fluid retention and elevated blood pressure. Prolonged use of licorice root supplements can contribute to hypertension and worsen existing cardiovascular conditions," he reveals.
3. St. John's Wort
St. John’s Wort, commonly used for its potential antidepressant effects, can interact with various medications, including those used to manage blood pressure and cardiovascular conditions.
Takyrbashev elaborates further and says that this supplement "can interact with medications that are metabolized by the liver, potentially reducing their effectiveness. This interaction can sometimes lead to elevated blood pressure due to changes in how these medications regulate blood pressure." Yikes!
4. Kava
Kava, a supplement derived from the root of the kava plant, is often used for its calming effects and to promote relaxation. However, its use can have potential side effects related to blood pressure and cardiovascular health.
Takyrbashev says, "Kava is known for its soothing properties, but it's important to note that it has been linked to liver issues. Liver damage can adversely affect blood pressure regulation and overall cardiovascular health, especially with prolonged or excessive use." Noted!