High blood pressure, also known as hypertension, is a serious health condition that can lead to life-threatening illnesses such as heart attacks and strokes. It can also increase the risk of kidney disease and vascular dementia. Despite its potential severity, high blood pressure often presents very few early symptoms, meaning many individuals may have it without realizing it. Therefore, it is crucial to take steps to minimize your risk.
Understanding High Blood Pressure
High blood pressure occurs when the force of blood against the walls of your blood vessels is consistently too high. Over time, this can damage the vessel walls, causing tears. The body attempts to repair these tears by sending cells that stick to the damaged sites, but this can lead to a buildup of cholesterol and fats, narrowing the arteries. This narrowing forces the heart to work harder, further increasing blood pressure and potentially leading to heart failure, heart attack, stroke, or kidney failure.
Symptoms of High Blood Pressure
High blood pressure typically does not cause noticeable symptoms, so many people are unaware they have it. The only way to confirm is through a blood pressure check, usually performed at a doctor's surgery or pharmacy using a cuff around the upper arm. On rare occasions, symptoms may include headaches, vision changes, chest pain, shortness of breath, dizziness, nosebleeds, fatigue, heart palpitations, or facial flushing.
Risk Factors
While some risk factors like age, ethnicity, and family history are beyond your control, others are manageable. Key controllable factors include smoking, alcohol consumption, being overweight, chronic stress, and an unhealthy diet.
How to Lower Blood Pressure
Medication can be prescribed by a doctor, but lifestyle changes are also effective. The NHS recommends a healthy, balanced diet rich in fruits, vegetables, and whole grains; reducing salt intake; regular exercise (at least 150 minutes per week); weight loss if overweight; limiting alcohol to no more than 14 units per week; reducing caffeine; and quitting smoking.
The DASH diet (Dietary Approaches to Stop Hypertension) is specifically designed to combat high blood pressure. It emphasizes fiber, calcium, potassium, and magnesium while reducing sodium and unhealthy fats. This diet has been called the world's second healthiest diet.
Foods to Avoid for Blood Pressure
The most critical food group to cut is salty foods. Most salt intake comes from pre-packaged foods, including breakfast cereals and ultra-processed items like salty snacks and ready-made pizzas. Processed meats, such as ham, sausages, and bacon, are also high in salt and are classified as carcinogenic by the World Health Organisation.
Sugary and fatty foods do not directly raise blood pressure but contribute to weight gain, which is linked to hypertension. Alcohol and excess caffeine can also negatively affect blood pressure. A moderate intake of 4-5 cups of coffee per day is generally safe, but sensitivity varies.
Detailed List of Foods to Limit
- Salty foods: pizza, burgers, processed meats
- Sugary foods: desserts, granola bars, cereals, fizzy drinks, fruit juices, energy drinks
- Red meat: beef, lamb, venison
- Alcohol: all types
- Saturated fats: butter, processed meats, pre-made desserts
- Ultra-processed foods: various packaged items
What is Processed Meat?
According to the World Health Organisation, processed meat is meat transformed through salting, curing, fermentation, smoking, or other processes to enhance flavor or preservation. Examples include hot dogs, ham, sausages, corned beef, biltong, beef jerky, and canned meat.
