Hibiscus sabdariffa, commonly known as zobo in Nigeria and sorrel in the Caribbean and some parts of Africa, has been studied for various health benefits. When I was young, I remember that I used to remove the petals, get to the stalk, and duck out a form of nectar from it.

I’ve come to value its health benefits, which are science-based and research-supported. I love its sharp taste too.

Here are some, and they are amazing:

1. Blood Pressure Reduction
This is one of the most commonly known benefits. There is so much strong evidence to back this up! Multiple human clinical trials and meta-analyses have found that hibiscus tea or extract can reduce both systolic and diastolic blood pressure in people with and without hypertension. It was discovered that hibiscus reduced systolic BP by an average of 7.58 mmHg.

The mechanisms:
Likely related to its diuretic effect, which is a mode of action of some blood pressure-lowering meds called water tablets or diuretics. The ability to dilate blood vessels, termed vasodilation.

2. Cholesterol and Lipid Improvement
Sadly, in modern times, we have given cholesterol a bad name! We need cholesterol, and our liver helps produce it. It’s when levels and types are abnormal that we have problems. Some research has even shown that when levels are too low, it can trigger leukaemia. Some studies indicate that hibiscus may help reduce LDL (“bad”) cholesterol and triglycerides and/or increase HDL (“good”) cholesterol in individuals with dyslipidemia or diabetes. It must be borne in mind that people who suffer from diabetes tend to have higher cholesterol levels and higher blood pressure.

The mechanisms:
It’s rich in a group of antioxidants called anthocyanins, which help combat oxidative stress caused by free radicals and improve lipid profiles.

3. Antioxidant Effects
We need antioxidants in this modern world we live in like never before. Hibiscus is rich in antioxidant compounds (especially polyphenols like anthocyanins, flavonoids, and phenolic acids).

Mechanisms:
These compounds help neutralize free radicals, reducing oxidative stress and the risk of chronic diseases.

4. Antimicrobial and Immune Boosting
God put inside of us a powerful immune system. The function of the immune system is to protect the body against infections, diseases, and harmful substances. It acts as the body’s defense mechanism. It identifies and destroys things that may cause harm, such as bacteria, viruses, parasites, fungi, and even abnormal cells like cancer cells. Some lab and animal studies show hibiscus extracts inhibit bacteria(such as E. coli and Staphylococcus aureus) and certain fungi.

Mechanism:
It may also help modulate immune responses.

5. Support for Weight Management
Today, there seems to be a global pandemic of overweight and obesity. Below are global statistics according to WHO:
More than 1 billion people worldwide are obese: 650 million adults, 340 million adolescents, and 39 million children.
Overweight and obesity have nearly tripled since 1975. As of 2016 (WHO), 39% of adults (18+) were overweight. 13% of adults were obese.
People globally are finding ways to lose weight. Preliminary studies suggest hibiscus tea/extract might help reduce body weight, BMI, and fat accumulation(especially abdominal fat). Abdominal fat is one of the dangerous fats in the human body. Finding a simple plant that helps with this is mind-blowing.

Mechanisms:
This effect may be due to the inhibition of amylase and lipid metabolism enzymes by hibiscus polyphenols. Amylase is an important enzyme that plays a key role in the digestive system, especially in the breakdown of carbohydrates. So it stops the breakdown of carbs into glucose that can make us fat. Lipid metabolism is the process involved in the synthesis and degradation of lipids in cells.

6. Anti-Diabetic Potential
With the global population of people in the world suffering from diabetes-2 and its consequences, having a flower that can impact this chronic disease is a blessing.

Mechanisms:
Some studies in humans and animals observed improved insulin resistance. Insulin resistance is a major root cause of diabetes-2, where the cells refuse to accept the transported excess blood sugar into the cells to provide energy. This results in high blood sugar levels and lowers blood glucose levels in type 2 diabetes patients after regular consumption of hibiscus tea.

7. Liver Protection
The liver is a vital organ in the human body with many essential functions, which include detox, bile production, metabolism, etc, hence it must be well protected. Animal studies and small human trials show protective effects on the liver.

Mechanisms:
Reduce liver fat.
Reduce oxidative stress.

Safety & Considerations
It is generally recognised as safe at moderate levels (teas or traditional beverages). However, it may interact with diuretics or blood pressure medications due to additive effects, so a balance must be reached.

It’s important to consult with a health professional if you are on medication, pregnant or breastfeeding.

References:
Serban, C, et al. (2015). J. Hypertens, 33(6):1119-1127. [meta-analysis]
Mozaffari-Khosravi, H, et al. (2009). Phytomedicine, 16(5): 375-382.
Da-Costa-Rocha, I, et al. (2014). Food Chemistry, 165:424-443.
Caceres, A., et al. (1991). Journal of Ethnopharmacology, 31(1):23-27.
Chang, H-C, et al. (2014). Food & Function, 5, 1141-1147.
Ajiboye, BO, et al. (2011). Journal of Ethnopharmacology, 133(2): 469-474.
Lin, T-L, et al. (2007). Food & Chemical Toxicology, 45(5): 839-846.