Cardiologist Issues Warning Over Popular Black Sweet and Blood Pressure Risks
A leading cardiologist has highlighted a surprising dietary culprit that can contribute to high blood pressure: black liquorice. Dr Nicole Harkin, a board-certified expert in Internal Medicine, Cardiology, Echocardiography, and Clinical Lipidology, shared this insight in a recent social media post, cautioning that regular consumption of this popular sweet may negatively impact heart health.
The Shocking Discovery from Clinical Experience
In a video addressed to her 16,000 followers on TikTok, Dr Harkin disclosed that large quantities of black liquorice have been linked to elevated blood pressure levels. She recounted a specific case involving a patient who developed new blood pressure issues due to an obsession with the sweet. "I actually had one patient who had new blood pressure issues from her newfound obsession with black liquorice. It resolved when I figured it out and had her stop eating it!" Dr Harkin explained, underscoring the direct connection between the treat and cardiovascular concerns.
Understanding the Broader Context of Blood Pressure Factors
While diet, physical activity, age, and genetics are primary influencers of blood pressure, Dr Harkin emphasized that other elements can also play a significant role. Her list includes certain medications, thyroid disorders, obstructive sleep apnea, excessive alcohol intake, and notably, black liquorice. This comprehensive view helps raise awareness about less obvious triggers that individuals should monitor for optimal heart health.
British Heart Foundation Supports the Cautionary Advice
The British Heart Foundation (BHF) echoes this warning on its official website, stating that consuming large amounts of black liquorice poses risks, particularly for vulnerable populations. BHF dietitian Victoria Taylor clarified that while liquorice sweets coated in salt are clearly detrimental, moderate consumption occasionally is generally safe. However, she advised that daily intake of even moderate quantities—around 57 grams or 2 ounces—can lead to adverse physical effects, especially for those over 40 or with a history of cardiovascular disease or high blood pressure.
The Science Behind the Risk: Glycyrrhizin Explained
The potential dangers stem from glycyrrhizin, a compound found in liquorice root that is approximately 30 to 50 times sweeter than sugar. This substance can disrupt the balance of potassium and sodium in the body, which are crucial for regulating fluid levels. Excessive glycyrrhizin intake may result in fluid retention and muscle weakness, further complicating heart health. The BHF reassures that these effects are typically not permanent; discontinuing liquorice consumption usually allows sodium, potassium, and fluid levels to normalize. Nonetheless, individuals experiencing symptoms should consult a GP to rule out other causes.
Practical Recommendations for Consumers
To safeguard heart health, experts recommend limiting black liquorice intake, particularly for older adults or those with pre-existing conditions. Always seek medical advice for any health concerns, and be mindful of hidden sources of glycyrrhizin in foods and supplements. This revelation serves as a reminder that even seemingly harmless treats can have significant implications for cardiovascular well-being.
