Blood pressure is a vital indicator of our overall health and can greatly affect our risk of heart attack and stroke. One factor that can significantly impact blood pressure is our salt intake. According to the NHS, consuming too much salt can raise blood pressure and increase our risk of heart disease and stroke. It is recommended that adults stick to no more than 6g of salt per day, which is equivalent to about a level teaspoon. However, there is another mineral that has been shown to have a positive effect on blood pressure – potassium.
The American Heart Association (AHA) states that potassium can help to control blood pressure by counteracting the effects of sodium. They explain that the more potassium we consume, the more sodium we lose through urine. This can help to lower blood pressure. However, the NHS advises against taking potassium supplements, as it is possible to get enough of this mineral through our diet. Too much potassium can also be dangerous, especially for older individuals.
Recently, on the podcast of gut health company ZOE, co-founder Professor Tim Spector discussed the potential benefits of potassium on blood pressure. He explained that potassium plays a role in regulating the balance of fluids in our body and ensuring our heart functions properly. Some research suggests that potassium may have an even greater impact on blood pressure than salt.
Professor Spector also highlighted the importance of the sodium-to-potassium ratio. He stated that this ratio is more significant than just salt intake alone. It is essential to remember that salt is a combination of sodium and chloride. A 2023 study found that this ratio could predict cardiovascular disease independently of other factors. Additionally, a 2020 meta-analysis linked a diet higher in potassium and lower in sodium to better blood pressure.
However, it is essential to note that increasing potassium intake does not mean we can consume too much salt safely. As Professor Spector advises, it is still crucial to reduce our salt intake. Nevertheless, individuals who consume enough potassium in their diet and also limit their salt intake may benefit from increased protection against high blood pressure.
But who should consume more potassium, and who should avoid it? The AHA suggests that adults with blood pressure of 120/80 mm Hg or higher may benefit from increasing potassium in their diet. However, it is essential to speak to a doctor before making any changes in your diet, especially if you have kidney disease, take certain medications, or have a condition that affects how your body handles potassium.
The NHS recommends that most adults should aim for 3,500mg of potassium per day, which is achievable through a balanced diet. Consuming too much potassium can cause an upset stomach, and as the NHS states, “older people should not take potassium supplements unless advised to by a doctor.”
Luckily, potassium is readily available in a variety of foods. Some of the top sources of potassium include potatoes, spinach, Swiss chard, water chestnuts, yams, kiwi fruit, orange juice, pomegranate juice, prune juice, bananas, acorn squash, bamboo shoots, carrot juice, fufu, lima beans, plantains, broccoli, parsnips, Brussels sprouts, beans and pulses, nuts and seeds, fish, beef, chicken, and turkey.
In conclusion, while it is crucial to limit our salt intake to protect our blood pressure, we should also pay attention to our potassium intake. The sodium-to-potassium ratio is vital, and a diet higher in potassium and lower in sodium may have a positive impact on our blood pressure. However, it is essential to consult a doctor before making any significant changes in our diet, and it is best to obtain potassium through food rather than supplements. Let’s strive for a balanced diet to maintain our blood pressure and overall health.
