It is widely known that managing hypertension requires quitting smoking and alcohol, adopting a low-salt, low-fat diet, and choosing easily digestible foods. The emphasis on low salt stems from the well-established scientific fact that high-salt diets contribute to hypertension.The link between high-salt diets and hypertension is not pseudoscience. So what is the underlying cause?
Numerous studies confirm a strong correlation between salt intake and blood pressure levels. Long-term high-salt consumption increases hypertension risk, which in turn leads to various health complications and severely impacts well-being.
The increased hypertension risk from high-salt diets stems from sodium in table salt. Sodium affects blood pressure primarily through these mechanisms:
1. Excessive salt intake raises sodium ions in the blood, increasing plasma osmotic pressure. To maintain osmotic balance, blood vessels draw in more water. This increased fluid volume naturally elevates blood pressure. This is the primary theory.
2. Sodium may directly act on angiotensin receptors. Excessive salt intake elevates sympathetic nervous system activity, inevitably causing arterial constriction and blood pressure elevation.
3. High salt intake promotes excessive release of endocrine hormones. These hormones are secreted by the kidneys to regulate water-electrolyte balance. This process also causes vasoconstriction, leading to a continuous rise in blood pressure and ultimately hypertension.
4. Long-term high sodium intake increases the excretory burden on the kidneys. The kidneys' primary functions include maintaining water and ion balance within the body and eliminating waste products. Excessive sodium intake inevitably increases the workload on the kidneys. If kidney problems arise, this will ultimately affect blood pressure.
In summary, current research indicates that a high-salt diet contributes to hypertension. Advocating for low-salt diets is scientifically sound, and a low-sodium diet is crucial for our health, helping to control blood pressure and reduce the burden on the kidneys.
Note: A high-salt diet not only contributes to hypertension but also increases the risk of numerous diseases, including osteoporosis, digestive disorders like gastritis and gastric cancer, obesity, diabetes, exacerbated bronchial asthma, upper respiratory infections, and heightened cardiac strain that may trigger heart failure. Therefore, for optimal health, a low-salt diet is advisable.