Already considered one of the most powerful superfoods on the market today, Rooibos tea’s antioxidant army also packs a protective punch against heart disease, research shows.
Local and international studies are repeatedly reinforcing this discovery, with the latest study, conducted by Spanish researchers, showing that drinking Rooibos can prevent the development of heart disease by inhibiting the liver from storing excessive fat under the skin and around major organs. These researchers also determined that Rooibos not only reduces the number and size of fat cells, but also completely prevents the development of fatty liver disease – a condition where fat accumulates in the cells of the liver.
The study also confirmed that the complex mix of antioxidants in Rooibos are jointly responsible for its beneficial effects, and that it is therefore better to drink Rooibos tea, rather than isolated compounds from Rooibos.
These findings add further weight to an earlier South African study led by Professor Jeanine Marnewick, a specialist researcher at the Cape Peninsula University of Technology (CPUT), who was able to show a positive effect in adults at risk of heart disease, who drank six cups of Rooibos every day for six weeks.
Her study showed that Rooibos not only protected against oxidative lipid damage, but also favourably improved the lipid profile of the participants by reducing total blood cholesterol levels by 10%, with a significant reduction in “bad” LDL cholesterol levels.
A third study conducted in Sweden found that 30 to 60 minutes after drinking 400 ml of Rooibos, the activity of a specific enzyme (called angiotensin-converting enzyme, or ace) is significantly suppressed. This enzyme is believed to be involved in the development of cardiovascular disease, and therefore ace inhibitors are used to treat hypertension and heart disease.
The main heart-health promoting substance in Rooibos tea is the antioxidant Chrysoeriol. It helps to prevent and treat vascular disease by inhibiting the migration of smooth muscle cells inside the aorta, a key cause of the narrowing or hardening of the arteries that may lead to a heart attack. Chrysoeriol is also an effective bronchodilator, and helps to lower blood pressure and relieve spasms.
Ernest du Toit, spokesperson for the SA Rooibos Council (SARC) says it is very encouraging that leading research institutions around the world are working on Rooibos and are repeatedly producing such promising results.
“With more South Africans dying from heart disease and stroke than ever before, these studies underline the value of Rooibos as a widely available, affordable and uniquely South African product rich in dietary antioxidants, which promotes heart-health.
“Rooibos, in combination with an overall healthy diet with whole grains, fish, fruits and vegetables, and less processed foods, could significantly reduce the risk of heart disease,” says du Toit.
The South African Rooibos Council invests significantly into the research of Rooibos’ health properties. This year the Council is supporting research projects at several local universities focusing on the anti-aging potential of Rooibos as well as its effect on immunity.
Summaries of the most recent rooibos studies published in top peer-reviewed scientific journals can be found on the website of the SA Rooibos Council at www.sarooibos.org.za
Issued by Meropa Communications on behalf of the South African Rooibos Council. For more information contact Brigitte Taim on 021 683 6464 or firstname.lastname@example.org.
Notes to editor:
Shocking stats paint stark reality of heart disease in SA:
· Approximately 6.3 million South Africans are living with high blood pressure
· Premature deaths due to heart and blood vessel diseases in people of working age (35 – 64 years) are expected to increase by 41% between now and 2030
· Statistics show that about 130 heart attacks and 240 strokes occur daily in SA, which means that 10 people will suffer a stroke and five will have a heart attack every hour
One of the best-kept weight-loss secrets could already be in your pantry. Celebs swear by it, and research confirms that Rooibos tea is the ideal way to help you slim down this summer.
By swapping just one cup of coffee for Rooibos tea every day, you could lose as much as a kilo every month. Most of us load our coffee with sugary syrups, honey, whipped cream or milk and sugar which can add anything from 35 to 250+ calories per cup. And if one considers that the average South African knocks back about four cups of coffee a day, drinking Rooibos instead could lead to a whopping 7 – 14kg shed in a year.
Ernest du Toit, spokesperson for the SA Rooibos Council, says the indigenous tea offers dieters a healthy, enjoyable and sustainable way to lose weight.
“Rooibos tea contains no fat or carbohydrates and its weight-loss properties further extends to inhibiting fat-storage hormones within the body. Rooibos’s unique Bioflavonoid, Aspalathin, helps to reduce stress hormones that trigger hunger and fat storage, typically associated with high blood pressure, heart disease, metabolic syndrome, insulin resistance and Type 2 diabetes. In a nutshell, Rooibos tea can prevent the body from storing and even forming new fat cells.
“Rooibos tea is also caffeine-free and naturally sweet so there’s no need to add extra sugar. Plus it comes in a variety of flavours like berry, cinnamon, mint and citrus. It’s also 100% natural with no additives, no preservatives and no chemicals,” he says.
“Drinking Rooibos tea instead of a regular 35+ calorie cup of coffee (enjoyed with milk and a spoonful of sugar) or a 100+ calorie carbonated drink will automatically reduce your calorie intake, which should put you well on your way to losing centimetres.”
A-list celebrities sporting already svelte figures such as Angelina Jolie, Catherine Zeta Jones and supermodel Cindy Crawford all swear by Rooibos’s health benefits.
Drinking up to six cups a day – hot or cold – along with a healthy and balanced diet, will provide you with the maximum health and weight-loss benefits that Rooibos tea can offer.
Results from a clinical trial showing that Rooibos significantly reduces the risk of heart disease were announced at a Rooibos Science Café at the MTN ScienCentre in Cape Town on 26 November 2008. About 150 members of the media, health sector and the Rooibos industry attended the event and were delighted about this new and conclusive evidence of the health promoting properties of Rooibos in humans.
Researchers traced the protective effect of Rooibos by looking at two important markers in the blood, as well as the oxidative status of the 40 adults who participated in the study. They found a significant decrease in conjugated dienes and malondialdehydes of 35% and 50% respectively – two blood markers that indicate oxidative damage – in the group that drank six cups of Rooibos per day for 6 weeks. “This means that Rooibos may help to slow down atherosclerosis, or the hardening of arteries,” explained Dr Jeanine Marnewick, who led the clinical trial at the Oxidative Stress Research Centre at the Cape Peninsula University of Technology. On top of this, Rooibos also increased the levels of the body’s own ‘super anti-oxidant’ called glutathione and helped to reduce the levels of “bad” LDL-cholesterol significantly.
“This is incredible news for Rooibos and the public,” said Mientjie Mouton, a director of the South African Rooibos Council. “We need scientific evidence to substantiate what we have always known – that Rooibos is good for you!”
Dr Marnewick also explained that they asked study participants for feedback on how they felt during the clinical trial. “Many of them reported feeling irritated during the washout period when they could not drink Rooibos, and much calmer once they were enjoying their six cups of Rooibos per day. That is why she will continue the clinical trial to look at the effect of Rooibos and stress.”
At the same science café Dr Carl Albrecht, head of Research at the Cancer Association of South Africa (CANSA) gave an overview of nearly a decade of research at South Africa’s Medical Research Council into the ability of Rooibos to prevent or slow down cancer. He also emphasised the importance of the ability of Rooibos to reduce oxidative stress in the body, as shown by the results of a study on rats, published in 2003. “I am elated that Dr Marnewick and her team were now able to prove that Rooibos also has this effect in the human body,” he added. Oxidative stress plays a role in the development of a whole range of diseases, including cancer, stroke, heart and liver disease, diabetes and Alzheimer’s. Another important milestone was the discovery, published in 2004, that Rooibos can prevent and slow down skin cancer in mice. “The next challenge is to prove that Rooibos can also prevent cancer in people, and I believe that there is a good chance that we’ll be able to prove this,” Dr Albrecht said.
This Rooibos Science Café was organised by the South African Rooibos Council who invests in Rooibos research, along with funding partners such as South Africa’s National Research Foundation as well as the Medical Research Council and CANSA.