Possibly Effective for:
- High blood pressure. Some early research shows that drinking hibiscus tea for 2-6 weeks decreases blood pressure in people with mildly high blood pressure. Other early research shows that taking a hibiscus extract by mouth for 4 weeks may be as effective as the prescription drug for reducing blood pressure in people with mild to moderate high blood pressure. However, an analysis of results from various clinical studies suggests that there is not enough evidence to draw strong conclusions about the effects of hibiscus in reducinghigh blood pressure.
Insufficient Evidence for:
- High cholesterol. Some early research suggests that taking hibiscus extract bymouth or consuming hibiscus tea might lower cholesterol levels in people withmetabolic syndrome or diabetes. However other early research shows that taking a specific extract of hibiscus leaves (Green Chem, Bangalore, India) for 90 days does not improve cholesterol levels in people with high cholesterol. Also, taking hibiscus extract by mouth for 12 weeks does not appear to reducecholesterol compared to the drug pravastatin and may actually increasecholesterol levels in people with high cholesterol.
- Loss of appetite.
- Irritated stomach.
- Fluid retention.
- Heart disease.
- Nerve disease.
- Other conditions.
Special Precautions & Warnings:Pregnancy and breast-feeding
: Hibiscus is POSSIBLY UNSAFE
when taken by mouth during pregnancy. There is some evidence that hibiscus might startmenstruation, and this could cause a miscarriage. There is not enough reliable information about the safety of taking hibiscus if you are breast-feeding. Stay on the safe side, and avoid use.Diabetes
: Hibiscus might decrease blood sugar levels. The dose of your diabetes medications might need to be adjusted by your healthcare provider.Low blood pressure
: Hibiscus might lower blood pressure. In theory, taking hibiscus might make blood pressure become too low in people with low blood pressure.Surgery
: Hibiscus might affect blood sugar levels, making blood sugar control difficult during and after surgery. Stop using hibiscus at least 2 weeks before a scheduled surgery.