Hibiscus

Hibiscus is a plant that is known for its large and colorful flowers. Different varieties of hibiscus are used as herbal remedies all over the world.

Over the past years, scientists have investigated the health benefits of hibiscus and of the chemicals contained in this plant.

What is hibiscus used for?

Hibiscus is used to treat a number of health problems such as high blood pressure, high cholesterol levels and head lice.

There is some promising research suggesting that hibiscus could help to lower blood pressure. However, further studies are still needed to confirm this. Some research suggests that hibiscus could be helpful in reducing cholesterol levels. One of these studies focused on people who suffered from metabolic syndrome. This condition is a cluster of risk factors including excess weight, a high blood sugar level and high blood pressure. Metabolic syndrome increases the risk of heart disease and diabetes. In the context of this study, the use of a hibiscus extract in people who suffered from metabolic syndrome was associated with a reduction in blood sugar, a reduction in total cholesterol, a higher level of “good” HDL cholesterol and an improved insulin sensitivity. However, there is still not enough scientific data to recommend the use of hibiscus for this area of application. A small study tested different herbal preparations for the treatment of head lice. A mixture that contained hibiscus and other plant extracts appeared to be effective. Here, too, further investigation is needed. Some scientists are examining hibiscus with regard to whether it could be used as an antioxidant, but further investigation is needed before a statement on this is possible.

Dosage

For none of the areas of application mentioned has an optimal dosage been established so far. Since the quality and the active ingredients of different supplements can vary greatly, it is difficult to define a standard dosage.

Can hibiscus be consumed in the form of natural foods?

Hibiscus tea is a popular beverage.

Risks and side effects

  • Side effects: Hibiscus can cause a drop in blood pressure and is also associated with dermatitis.
  • Risks: Hibiscus should be avoided if one reacts allergically to plants of the Malvaceae family. Hibiscus should be used with caution if one suffers from low blood pressure.
  • Interactions: Hibiscus tea can impair the effectiveness of some malaria medications.

References

  1. Natural Standard Professional Monograph: “Hibiscus.”
  2. Frank, T. Journal of the Science of Food and Agriculture, Aug. 15, 2012.
  3. Wahabi, H. Phytomedicine, February 2010.
  4. McKay, D. Journal of Nutrition, February 2010.
  5. Gurrola-Diaz, C. Phytomedicine, June 2010.
  6. National Institutes of Health: “What is metabolic syndrome?”
  7. Clemson Cooperative Extension: “Hibiscus.”